2018-11-11 00:15:11 +08:00
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// SPDX-License-Identifier: GPL-2.0+
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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/*
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* Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO)
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*
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* Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren
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*
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* This driver is inspired by:
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* pinctrl-nomadik.c, please see original file for copyright information
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* pinctrl-tegra.c, please see original file for copyright information
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*/
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#include <linux/bitmap.h>
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#include <linux/bug.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/err.h>
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2015-12-09 05:01:00 +08:00
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#include <linux/gpio/driver.h>
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/irqdesc.h>
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2017-05-23 04:56:48 +08:00
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#include <linux/init.h>
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#include <linux/of_address.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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2018-05-01 08:42:13 +08:00
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#include <linux/pinctrl/pinconf-generic.h>
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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2018-05-01 08:42:13 +08:00
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#include <dt-bindings/pinctrl/bcm2835.h>
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#define MODULE_NAME "pinctrl-bcm2835"
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#define BCM2835_NUM_GPIOS 54
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#define BCM2835_NUM_BANKS 2
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2015-02-24 21:40:50 +08:00
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#define BCM2835_NUM_IRQS 3
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#define BCM2835_PIN_BITMAP_SZ \
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DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
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/* GPIO register offsets */
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#define GPFSEL0 0x0 /* Function Select */
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#define GPSET0 0x1c /* Pin Output Set */
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#define GPCLR0 0x28 /* Pin Output Clear */
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#define GPLEV0 0x34 /* Pin Level */
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#define GPEDS0 0x40 /* Pin Event Detect Status */
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#define GPREN0 0x4c /* Pin Rising Edge Detect Enable */
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#define GPFEN0 0x58 /* Pin Falling Edge Detect Enable */
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#define GPHEN0 0x64 /* Pin High Detect Enable */
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#define GPLEN0 0x70 /* Pin Low Detect Enable */
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#define GPAREN0 0x7c /* Pin Async Rising Edge Detect */
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#define GPAFEN0 0x88 /* Pin Async Falling Edge Detect */
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#define GPPUD 0x94 /* Pin Pull-up/down Enable */
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#define GPPUDCLK0 0x98 /* Pin Pull-up/down Enable Clock */
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2019-07-22 14:23:25 +08:00
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#define GP_GPIO_PUP_PDN_CNTRL_REG0 0xe4 /* 2711 Pin Pull-up/down select */
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pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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#define FSEL_REG(p) (GPFSEL0 + (((p) / 10) * 4))
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#define FSEL_SHIFT(p) (((p) % 10) * 3)
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#define GPIO_REG_OFFSET(p) ((p) / 32)
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#define GPIO_REG_SHIFT(p) ((p) % 32)
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2019-07-22 14:23:25 +08:00
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#define PUD_2711_MASK 0x3
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#define PUD_2711_REG_OFFSET(p) ((p) / 16)
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#define PUD_2711_REG_SHIFT(p) (((p) % 16) * 2)
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2018-11-01 08:46:54 +08:00
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/* argument: bcm2835_pinconf_pull */
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#define BCM2835_PINCONF_PARAM_PULL (PIN_CONFIG_END + 1)
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
2019-07-22 14:23:25 +08:00
|
|
|
#define BCM2711_PULL_NONE 0x0
|
|
|
|
|
#define BCM2711_PULL_UP 0x1
|
|
|
|
|
#define BCM2711_PULL_DOWN 0x2
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
struct bcm2835_pinctrl {
|
|
|
|
|
struct device *dev;
|
|
|
|
|
void __iomem *base;
|
2015-02-24 21:40:50 +08:00
|
|
|
int irq[BCM2835_NUM_IRQS];
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
/* note: locking assumes each bank will have its own unsigned long */
|
|
|
|
|
unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
|
|
|
|
|
unsigned int irq_type[BCM2835_NUM_GPIOS];
|
|
|
|
|
|
|
|
|
|
struct pinctrl_dev *pctl_dev;
|
|
|
|
|
struct gpio_chip gpio_chip;
|
|
|
|
|
struct pinctrl_gpio_range gpio_range;
|
|
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spinlock_t irq_lock[BCM2835_NUM_BANKS];
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* pins are just named GPIO0..GPIO53 */
|
|
|
|
|
#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
|
2013-06-18 17:04:24 +08:00
|
|
|
static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
BCM2835_GPIO_PIN(0),
|
|
|
|
|
BCM2835_GPIO_PIN(1),
|
|
|
|
|
BCM2835_GPIO_PIN(2),
|
|
|
|
|
BCM2835_GPIO_PIN(3),
|
|
|
|
|
BCM2835_GPIO_PIN(4),
|
|
|
|
|
BCM2835_GPIO_PIN(5),
|
|
|
|
|
BCM2835_GPIO_PIN(6),
|
|
|
|
|
BCM2835_GPIO_PIN(7),
|
|
|
|
|
BCM2835_GPIO_PIN(8),
|
|
|
|
|
BCM2835_GPIO_PIN(9),
|
|
|
|
|
BCM2835_GPIO_PIN(10),
|
|
|
|
|
BCM2835_GPIO_PIN(11),
|
|
|
|
|
BCM2835_GPIO_PIN(12),
|
|
|
|
|
BCM2835_GPIO_PIN(13),
|
|
|
|
|
BCM2835_GPIO_PIN(14),
|
|
|
|
|
BCM2835_GPIO_PIN(15),
|
|
|
|
|
BCM2835_GPIO_PIN(16),
|
|
|
|
|
BCM2835_GPIO_PIN(17),
|
|
|
|
|
BCM2835_GPIO_PIN(18),
|
|
|
|
|
BCM2835_GPIO_PIN(19),
|
|
|
|
|
BCM2835_GPIO_PIN(20),
|
|
|
|
|
BCM2835_GPIO_PIN(21),
|
|
|
|
|
BCM2835_GPIO_PIN(22),
|
|
|
|
|
BCM2835_GPIO_PIN(23),
|
|
|
|
|
BCM2835_GPIO_PIN(24),
|
|
|
|
|
BCM2835_GPIO_PIN(25),
|
|
|
|
|
BCM2835_GPIO_PIN(26),
|
|
|
|
|
BCM2835_GPIO_PIN(27),
|
|
|
|
|
BCM2835_GPIO_PIN(28),
|
|
|
|
|
BCM2835_GPIO_PIN(29),
|
|
|
|
|
BCM2835_GPIO_PIN(30),
|
|
|
|
|
BCM2835_GPIO_PIN(31),
|
|
|
|
|
BCM2835_GPIO_PIN(32),
|
|
|
|
|
BCM2835_GPIO_PIN(33),
|
|
|
|
|
BCM2835_GPIO_PIN(34),
|
|
|
|
|
BCM2835_GPIO_PIN(35),
|
|
|
|
|
BCM2835_GPIO_PIN(36),
|
|
|
|
|
BCM2835_GPIO_PIN(37),
|
|
|
|
|
BCM2835_GPIO_PIN(38),
|
|
|
|
|
BCM2835_GPIO_PIN(39),
|
|
|
|
|
BCM2835_GPIO_PIN(40),
|
|
|
|
|
BCM2835_GPIO_PIN(41),
|
|
|
|
|
BCM2835_GPIO_PIN(42),
|
|
|
|
|
BCM2835_GPIO_PIN(43),
|
|
|
|
|
BCM2835_GPIO_PIN(44),
|
|
|
|
|
BCM2835_GPIO_PIN(45),
|
|
|
|
|
BCM2835_GPIO_PIN(46),
|
|
|
|
|
BCM2835_GPIO_PIN(47),
|
|
|
|
|
BCM2835_GPIO_PIN(48),
|
|
|
|
|
BCM2835_GPIO_PIN(49),
|
|
|
|
|
BCM2835_GPIO_PIN(50),
|
|
|
|
|
BCM2835_GPIO_PIN(51),
|
|
|
|
|
BCM2835_GPIO_PIN(52),
|
|
|
|
|
BCM2835_GPIO_PIN(53),
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* one pin per group */
|
|
|
|
|
static const char * const bcm2835_gpio_groups[] = {
|
|
|
|
|
"gpio0",
|
|
|
|
|
"gpio1",
|
|
|
|
|
"gpio2",
|
|
|
|
|
"gpio3",
|
|
|
|
|
"gpio4",
|
|
|
|
|
"gpio5",
|
|
|
|
|
"gpio6",
|
|
|
|
|
"gpio7",
|
|
|
|
|
"gpio8",
|
|
|
|
|
"gpio9",
|
|
|
|
|
"gpio10",
|
|
|
|
|
"gpio11",
|
|
|
|
|
"gpio12",
|
|
|
|
|
"gpio13",
|
|
|
|
|
"gpio14",
|
|
|
|
|
"gpio15",
|
|
|
|
|
"gpio16",
|
|
|
|
|
"gpio17",
|
|
|
|
|
"gpio18",
|
|
|
|
|
"gpio19",
|
|
|
|
|
"gpio20",
|
|
|
|
|
"gpio21",
|
|
|
|
|
"gpio22",
|
|
|
|
|
"gpio23",
|
|
|
|
|
"gpio24",
|
|
|
|
|
"gpio25",
|
|
|
|
|
"gpio26",
|
|
|
|
|
"gpio27",
|
|
|
|
|
"gpio28",
|
|
|
|
|
"gpio29",
|
|
|
|
|
"gpio30",
|
|
|
|
|
"gpio31",
|
|
|
|
|
"gpio32",
|
|
|
|
|
"gpio33",
|
|
|
|
|
"gpio34",
|
|
|
|
|
"gpio35",
|
|
|
|
|
"gpio36",
|
|
|
|
|
"gpio37",
|
|
|
|
|
"gpio38",
|
|
|
|
|
"gpio39",
|
|
|
|
|
"gpio40",
|
|
|
|
|
"gpio41",
|
|
|
|
|
"gpio42",
|
|
|
|
|
"gpio43",
|
|
|
|
|
"gpio44",
|
|
|
|
|
"gpio45",
|
|
|
|
|
"gpio46",
|
|
|
|
|
"gpio47",
|
|
|
|
|
"gpio48",
|
|
|
|
|
"gpio49",
|
|
|
|
|
"gpio50",
|
|
|
|
|
"gpio51",
|
|
|
|
|
"gpio52",
|
|
|
|
|
"gpio53",
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
enum bcm2835_fsel {
|
|
|
|
|
BCM2835_FSEL_COUNT = 8,
|
|
|
|
|
BCM2835_FSEL_MASK = 0x7,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = {
|
|
|
|
|
[BCM2835_FSEL_GPIO_IN] = "gpio_in",
|
|
|
|
|
[BCM2835_FSEL_GPIO_OUT] = "gpio_out",
|
|
|
|
|
[BCM2835_FSEL_ALT0] = "alt0",
|
|
|
|
|
[BCM2835_FSEL_ALT1] = "alt1",
|
|
|
|
|
[BCM2835_FSEL_ALT2] = "alt2",
|
|
|
|
|
[BCM2835_FSEL_ALT3] = "alt3",
|
|
|
|
|
[BCM2835_FSEL_ALT4] = "alt4",
|
|
|
|
|
[BCM2835_FSEL_ALT5] = "alt5",
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const char * const irq_type_names[] = {
|
|
|
|
|
[IRQ_TYPE_NONE] = "none",
|
|
|
|
|
[IRQ_TYPE_EDGE_RISING] = "edge-rising",
|
|
|
|
|
[IRQ_TYPE_EDGE_FALLING] = "edge-falling",
|
|
|
|
|
[IRQ_TYPE_EDGE_BOTH] = "edge-both",
|
|
|
|
|
[IRQ_TYPE_LEVEL_HIGH] = "level-high",
|
|
|
|
|
[IRQ_TYPE_LEVEL_LOW] = "level-low",
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg)
|
|
|
|
|
{
|
|
|
|
|
return readl(pc->base + reg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg,
|
|
|
|
|
u32 val)
|
|
|
|
|
{
|
|
|
|
|
writel(val, pc->base + reg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg,
|
|
|
|
|
unsigned bit)
|
|
|
|
|
{
|
|
|
|
|
reg += GPIO_REG_OFFSET(bit) * 4;
|
|
|
|
|
return (bcm2835_gpio_rd(pc, reg) >> GPIO_REG_SHIFT(bit)) & 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* note NOT a read/modify/write cycle */
|
|
|
|
|
static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned reg, unsigned bit)
|
|
|
|
|
{
|
|
|
|
|
reg += GPIO_REG_OFFSET(bit) * 4;
|
|
|
|
|
bcm2835_gpio_wr(pc, reg, BIT(GPIO_REG_SHIFT(bit)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get(
|
|
|
|
|
struct bcm2835_pinctrl *pc, unsigned pin)
|
|
|
|
|
{
|
|
|
|
|
u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
|
|
|
|
|
enum bcm2835_fsel status = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
|
|
|
|
|
|
|
|
|
|
dev_dbg(pc->dev, "get %08x (%u => %s)\n", val, pin,
|
|
|
|
|
bcm2835_functions[status]);
|
|
|
|
|
|
|
|
|
|
return status;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void bcm2835_pinctrl_fsel_set(
|
|
|
|
|
struct bcm2835_pinctrl *pc, unsigned pin,
|
|
|
|
|
enum bcm2835_fsel fsel)
|
|
|
|
|
{
|
|
|
|
|
u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
|
|
|
|
|
enum bcm2835_fsel cur = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
|
|
|
|
|
|
|
|
|
|
dev_dbg(pc->dev, "read %08x (%u => %s)\n", val, pin,
|
|
|
|
|
bcm2835_functions[cur]);
|
|
|
|
|
|
|
|
|
|
if (cur == fsel)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (cur != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_IN) {
|
|
|
|
|
/* always transition through GPIO_IN */
|
|
|
|
|
val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
|
|
|
|
|
val |= BCM2835_FSEL_GPIO_IN << FSEL_SHIFT(pin);
|
|
|
|
|
|
|
|
|
|
dev_dbg(pc->dev, "trans %08x (%u <= %s)\n", val, pin,
|
|
|
|
|
bcm2835_functions[BCM2835_FSEL_GPIO_IN]);
|
|
|
|
|
bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
|
|
|
|
|
val |= fsel << FSEL_SHIFT(pin);
|
|
|
|
|
|
|
|
|
|
dev_dbg(pc->dev, "write %08x (%u <= %s)\n", val, pin,
|
|
|
|
|
bcm2835_functions[fsel]);
|
|
|
|
|
bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
|
|
|
{
|
|
|
|
|
return pinctrl_gpio_direction_input(chip->base + offset);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|
|
|
|
{
|
2015-12-09 05:01:00 +08:00
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
|
|
|
|
|
}
|
|
|
|
|
|
2016-03-28 22:58:24 +08:00
|
|
|
static int bcm2835_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
|
|
|
|
enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
|
|
|
|
|
|
|
|
|
|
/* Alternative function doesn't clearly provide a direction */
|
|
|
|
|
if (fsel > BCM2835_FSEL_GPIO_OUT)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
return (fsel == BCM2835_FSEL_GPIO_IN);
|
|
|
|
|
}
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
|
|
|
|
|
{
|
2015-12-09 05:01:00 +08:00
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
|
|
|
|
|
}
|
|
|
|
|
|
2015-11-19 08:32:27 +08:00
|
|
|
static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
|
|
|
|
|
unsigned offset, int value)
|
|
|
|
|
{
|
|
|
|
|
bcm2835_gpio_set(chip, offset, value);
|
|
|
|
|
return pinctrl_gpio_direction_output(chip->base + offset);
|
|
|
|
|
}
|
|
|
|
|
|
2017-07-12 02:03:39 +08:00
|
|
|
static const struct gpio_chip bcm2835_gpio_chip = {
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.label = MODULE_NAME,
|
|
|
|
|
.owner = THIS_MODULE,
|
2015-10-11 23:34:19 +08:00
|
|
|
.request = gpiochip_generic_request,
|
|
|
|
|
.free = gpiochip_generic_free,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.direction_input = bcm2835_gpio_direction_input,
|
|
|
|
|
.direction_output = bcm2835_gpio_direction_output,
|
2016-03-28 22:58:24 +08:00
|
|
|
.get_direction = bcm2835_gpio_get_direction,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.get = bcm2835_gpio_get,
|
|
|
|
|
.set = bcm2835_gpio_set,
|
2019-02-03 21:02:34 +08:00
|
|
|
.set_config = gpiochip_generic_config,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.base = -1,
|
|
|
|
|
.ngpio = BCM2835_NUM_GPIOS,
|
2013-12-04 21:42:46 +08:00
|
|
|
.can_sleep = false,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
};
|
|
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
static void bcm2835_gpio_irq_handle_bank(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned int bank, u32 mask)
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
{
|
|
|
|
|
unsigned long events;
|
|
|
|
|
unsigned offset;
|
|
|
|
|
unsigned gpio;
|
|
|
|
|
|
|
|
|
|
events = bcm2835_gpio_rd(pc, GPEDS0 + bank * 4);
|
2015-02-24 21:40:50 +08:00
|
|
|
events &= mask;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
events &= pc->enabled_irq_map[bank];
|
|
|
|
|
for_each_set_bit(offset, &events, 32) {
|
|
|
|
|
gpio = (32 * bank) + offset;
|
2017-11-09 16:36:07 +08:00
|
|
|
generic_handle_irq(irq_linear_revmap(pc->gpio_chip.irq.domain,
|
2016-11-15 01:48:19 +08:00
|
|
|
gpio));
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
}
|
2015-02-24 21:40:50 +08:00
|
|
|
}
|
|
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
static void bcm2835_gpio_irq_handler(struct irq_desc *desc)
|
2015-02-24 21:40:50 +08:00
|
|
|
{
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = irq_desc_get_handler_data(desc);
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
|
|
|
|
struct irq_chip *host_chip = irq_desc_get_chip(desc);
|
|
|
|
|
int irq = irq_desc_get_irq(desc);
|
|
|
|
|
int group;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pc->irq); i++) {
|
|
|
|
|
if (pc->irq[i] == irq) {
|
2017-07-21 00:59:12 +08:00
|
|
|
group = i;
|
2016-11-15 01:48:19 +08:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
/* This should not happen, every IRQ has a bank */
|
|
|
|
|
if (i == ARRAY_SIZE(pc->irq))
|
|
|
|
|
BUG();
|
2015-02-24 21:40:50 +08:00
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
chained_irq_enter(host_chip, desc);
|
|
|
|
|
|
|
|
|
|
switch (group) {
|
2015-02-24 21:40:50 +08:00
|
|
|
case 0: /* IRQ0 covers GPIOs 0-27 */
|
2016-11-15 01:48:19 +08:00
|
|
|
bcm2835_gpio_irq_handle_bank(pc, 0, 0x0fffffff);
|
2015-02-24 21:40:50 +08:00
|
|
|
break;
|
|
|
|
|
case 1: /* IRQ1 covers GPIOs 28-45 */
|
2016-11-15 01:48:19 +08:00
|
|
|
bcm2835_gpio_irq_handle_bank(pc, 0, 0xf0000000);
|
|
|
|
|
bcm2835_gpio_irq_handle_bank(pc, 1, 0x00003fff);
|
2015-02-24 21:40:50 +08:00
|
|
|
break;
|
|
|
|
|
case 2: /* IRQ2 covers GPIOs 46-53 */
|
2016-11-15 01:48:19 +08:00
|
|
|
bcm2835_gpio_irq_handle_bank(pc, 1, 0x003fc000);
|
2015-02-24 21:40:50 +08:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
chained_irq_exit(host_chip, desc);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned reg, unsigned offset, bool enable)
|
|
|
|
|
{
|
|
|
|
|
u32 value;
|
|
|
|
|
reg += GPIO_REG_OFFSET(offset) * 4;
|
|
|
|
|
value = bcm2835_gpio_rd(pc, reg);
|
|
|
|
|
if (enable)
|
|
|
|
|
value |= BIT(GPIO_REG_SHIFT(offset));
|
|
|
|
|
else
|
|
|
|
|
value &= ~(BIT(GPIO_REG_SHIFT(offset)));
|
|
|
|
|
bcm2835_gpio_wr(pc, reg, value);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* fast path for IRQ handler */
|
|
|
|
|
static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned offset, bool enable)
|
|
|
|
|
{
|
|
|
|
|
switch (pc->irq_type[offset]) {
|
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPHEN0, offset, enable);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
|
|
|
__bcm2835_gpio_irq_config(pc, GPLEN0, offset, enable);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void bcm2835_gpio_irq_enable(struct irq_data *data)
|
|
|
|
|
{
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
unsigned gpio = irqd_to_hwirq(data);
|
|
|
|
|
unsigned offset = GPIO_REG_SHIFT(gpio);
|
|
|
|
|
unsigned bank = GPIO_REG_OFFSET(gpio);
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_lock_irqsave(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
set_bit(offset, &pc->enabled_irq_map[bank]);
|
|
|
|
|
bcm2835_gpio_irq_config(pc, gpio, true);
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void bcm2835_gpio_irq_disable(struct irq_data *data)
|
|
|
|
|
{
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
unsigned gpio = irqd_to_hwirq(data);
|
|
|
|
|
unsigned offset = GPIO_REG_SHIFT(gpio);
|
|
|
|
|
unsigned bank = GPIO_REG_OFFSET(gpio);
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_lock_irqsave(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
bcm2835_gpio_irq_config(pc, gpio, false);
|
2015-06-30 19:35:39 +08:00
|
|
|
/* Clear events that were latched prior to clearing event sources */
|
|
|
|
|
bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
clear_bit(offset, &pc->enabled_irq_map[bank]);
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned offset, unsigned int type)
|
|
|
|
|
{
|
|
|
|
|
switch (type) {
|
|
|
|
|
case IRQ_TYPE_NONE:
|
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
|
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
|
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* slower path for reconfiguring IRQ type */
|
|
|
|
|
static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned offset, unsigned int type)
|
|
|
|
|
{
|
|
|
|
|
switch (type) {
|
|
|
|
|
case IRQ_TYPE_NONE:
|
|
|
|
|
if (pc->irq_type[offset] != type) {
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
|
|
|
if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
|
|
|
|
|
/* RISING already enabled, disable FALLING */
|
|
|
|
|
pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
} else if (pc->irq_type[offset] != type) {
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
|
|
|
if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
|
|
|
|
|
/* FALLING already enabled, disable RISING */
|
|
|
|
|
pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
} else if (pc->irq_type[offset] != type) {
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
|
|
|
if (pc->irq_type[offset] == IRQ_TYPE_EDGE_RISING) {
|
|
|
|
|
/* RISING already enabled, enable FALLING too */
|
|
|
|
|
pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
} else if (pc->irq_type[offset] == IRQ_TYPE_EDGE_FALLING) {
|
|
|
|
|
/* FALLING already enabled, enable RISING too */
|
|
|
|
|
pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
} else if (pc->irq_type[offset] != type) {
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
|
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
|
|
|
if (pc->irq_type[offset] != type) {
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, false);
|
|
|
|
|
pc->irq_type[offset] = type;
|
|
|
|
|
bcm2835_gpio_irq_config(pc, offset, true);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type)
|
|
|
|
|
{
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
unsigned gpio = irqd_to_hwirq(data);
|
|
|
|
|
unsigned offset = GPIO_REG_SHIFT(gpio);
|
|
|
|
|
unsigned bank = GPIO_REG_OFFSET(gpio);
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
int ret;
|
|
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_lock_irqsave(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
if (test_bit(offset, &pc->enabled_irq_map[bank]))
|
|
|
|
|
ret = __bcm2835_gpio_irq_set_type_enabled(pc, gpio, type);
|
|
|
|
|
else
|
|
|
|
|
ret = __bcm2835_gpio_irq_set_type_disabled(pc, gpio, type);
|
|
|
|
|
|
2015-04-07 18:43:45 +08:00
|
|
|
if (type & IRQ_TYPE_EDGE_BOTH)
|
2015-06-23 21:52:41 +08:00
|
|
|
irq_set_handler_locked(data, handle_edge_irq);
|
2015-04-07 18:43:45 +08:00
|
|
|
else
|
2015-06-23 21:52:41 +08:00
|
|
|
irq_set_handler_locked(data, handle_level_irq);
|
2015-04-07 18:43:45 +08:00
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
2015-04-07 18:43:45 +08:00
|
|
|
static void bcm2835_gpio_irq_ack(struct irq_data *data)
|
|
|
|
|
{
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
|
struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
|
2015-04-07 18:43:45 +08:00
|
|
|
unsigned gpio = irqd_to_hwirq(data);
|
|
|
|
|
|
|
|
|
|
bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
|
|
|
|
|
}
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
static struct irq_chip bcm2835_gpio_irq_chip = {
|
|
|
|
|
.name = MODULE_NAME,
|
|
|
|
|
.irq_enable = bcm2835_gpio_irq_enable,
|
|
|
|
|
.irq_disable = bcm2835_gpio_irq_disable,
|
|
|
|
|
.irq_set_type = bcm2835_gpio_irq_set_type,
|
2015-04-07 18:43:45 +08:00
|
|
|
.irq_ack = bcm2835_gpio_irq_ack,
|
|
|
|
|
.irq_mask = bcm2835_gpio_irq_disable,
|
|
|
|
|
.irq_unmask = bcm2835_gpio_irq_enable,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
|
|
|
|
|
{
|
|
|
|
|
return ARRAY_SIZE(bcm2835_gpio_groups);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned selector)
|
|
|
|
|
{
|
|
|
|
|
return bcm2835_gpio_groups[selector];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned selector,
|
|
|
|
|
const unsigned **pins,
|
|
|
|
|
unsigned *num_pins)
|
|
|
|
|
{
|
|
|
|
|
*pins = &bcm2835_gpio_pins[selector].number;
|
|
|
|
|
*num_pins = 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
|
|
|
|
|
struct seq_file *s,
|
|
|
|
|
unsigned offset)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
2016-11-15 01:48:19 +08:00
|
|
|
struct gpio_chip *chip = &pc->gpio_chip;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
|
|
|
|
|
const char *fname = bcm2835_functions[fsel];
|
|
|
|
|
int value = bcm2835_gpio_get_bit(pc, GPLEV0, offset);
|
2017-11-08 02:15:47 +08:00
|
|
|
int irq = irq_find_mapping(chip->irq.domain, offset);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
seq_printf(s, "function %s in %s; irq %d (%s)",
|
|
|
|
|
fname, value ? "hi" : "lo",
|
|
|
|
|
irq, irq_type_names[pc->irq_type[offset]]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev,
|
|
|
|
|
struct pinctrl_map *maps, unsigned num_maps)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < num_maps; i++)
|
|
|
|
|
if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
|
|
|
|
|
kfree(maps[i].data.configs.configs);
|
|
|
|
|
|
|
|
|
|
kfree(maps);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc,
|
|
|
|
|
struct device_node *np, u32 pin, u32 fnum,
|
|
|
|
|
struct pinctrl_map **maps)
|
|
|
|
|
{
|
|
|
|
|
struct pinctrl_map *map = *maps;
|
|
|
|
|
|
|
|
|
|
if (fnum >= ARRAY_SIZE(bcm2835_functions)) {
|
2017-07-19 05:43:23 +08:00
|
|
|
dev_err(pc->dev, "%pOF: invalid brcm,function %d\n", np, fnum);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
map->type = PIN_MAP_TYPE_MUX_GROUP;
|
|
|
|
|
map->data.mux.group = bcm2835_gpio_groups[pin];
|
|
|
|
|
map->data.mux.function = bcm2835_functions[fnum];
|
|
|
|
|
(*maps)++;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc,
|
|
|
|
|
struct device_node *np, u32 pin, u32 pull,
|
|
|
|
|
struct pinctrl_map **maps)
|
|
|
|
|
{
|
|
|
|
|
struct pinctrl_map *map = *maps;
|
|
|
|
|
unsigned long *configs;
|
|
|
|
|
|
|
|
|
|
if (pull > 2) {
|
2017-07-19 05:43:23 +08:00
|
|
|
dev_err(pc->dev, "%pOF: invalid brcm,pull %d\n", np, pull);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
configs = kzalloc(sizeof(*configs), GFP_KERNEL);
|
|
|
|
|
if (!configs)
|
|
|
|
|
return -ENOMEM;
|
2018-05-01 08:42:13 +08:00
|
|
|
configs[0] = pinconf_to_config_packed(BCM2835_PINCONF_PARAM_PULL, pull);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
map->type = PIN_MAP_TYPE_CONFIGS_PIN;
|
|
|
|
|
map->data.configs.group_or_pin = bcm2835_gpio_pins[pin].name;
|
|
|
|
|
map->data.configs.configs = configs;
|
|
|
|
|
map->data.configs.num_configs = 1;
|
|
|
|
|
(*maps)++;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
|
|
|
|
|
struct device_node *np,
|
2018-05-01 08:42:13 +08:00
|
|
|
struct pinctrl_map **map, unsigned int *num_maps)
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
struct property *pins, *funcs, *pulls;
|
|
|
|
|
int num_pins, num_funcs, num_pulls, maps_per_pin;
|
|
|
|
|
struct pinctrl_map *maps, *cur_map;
|
|
|
|
|
int i, err;
|
|
|
|
|
u32 pin, func, pull;
|
|
|
|
|
|
2018-05-01 08:42:13 +08:00
|
|
|
/* Check for generic binding in this node */
|
|
|
|
|
err = pinconf_generic_dt_node_to_map_all(pctldev, np, map, num_maps);
|
|
|
|
|
if (err || *num_maps)
|
|
|
|
|
return err;
|
|
|
|
|
|
|
|
|
|
/* Generic binding did not find anything continue with legacy parse */
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
pins = of_find_property(np, "brcm,pins", NULL);
|
|
|
|
|
if (!pins) {
|
2017-07-19 05:43:23 +08:00
|
|
|
dev_err(pc->dev, "%pOF: missing brcm,pins property\n", np);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
funcs = of_find_property(np, "brcm,function", NULL);
|
|
|
|
|
pulls = of_find_property(np, "brcm,pull", NULL);
|
|
|
|
|
|
|
|
|
|
if (!funcs && !pulls) {
|
|
|
|
|
dev_err(pc->dev,
|
2017-07-19 05:43:23 +08:00
|
|
|
"%pOF: neither brcm,function nor brcm,pull specified\n",
|
|
|
|
|
np);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
num_pins = pins->length / 4;
|
|
|
|
|
num_funcs = funcs ? (funcs->length / 4) : 0;
|
|
|
|
|
num_pulls = pulls ? (pulls->length / 4) : 0;
|
|
|
|
|
|
|
|
|
|
if (num_funcs > 1 && num_funcs != num_pins) {
|
|
|
|
|
dev_err(pc->dev,
|
2017-07-19 05:43:23 +08:00
|
|
|
"%pOF: brcm,function must have 1 or %d entries\n",
|
|
|
|
|
np, num_pins);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (num_pulls > 1 && num_pulls != num_pins) {
|
|
|
|
|
dev_err(pc->dev,
|
2017-07-19 05:43:23 +08:00
|
|
|
"%pOF: brcm,pull must have 1 or %d entries\n",
|
|
|
|
|
np, num_pins);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
maps_per_pin = 0;
|
|
|
|
|
if (num_funcs)
|
|
|
|
|
maps_per_pin++;
|
|
|
|
|
if (num_pulls)
|
|
|
|
|
maps_per_pin++;
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 05:03:40 +08:00
|
|
|
cur_map = maps = kcalloc(num_pins * maps_per_pin, sizeof(*maps),
|
|
|
|
|
GFP_KERNEL);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
if (!maps)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < num_pins; i++) {
|
2013-03-28 13:09:57 +08:00
|
|
|
err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
|
2017-07-19 05:43:23 +08:00
|
|
|
dev_err(pc->dev, "%pOF: invalid brcm,pins value %d\n",
|
|
|
|
|
np, pin);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
err = -EINVAL;
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (num_funcs) {
|
2013-03-28 13:09:57 +08:00
|
|
|
err = of_property_read_u32_index(np, "brcm,function",
|
|
|
|
|
(num_funcs > 1) ? i : 0, &func);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
err = bcm2835_pctl_dt_node_to_map_func(pc, np, pin,
|
|
|
|
|
func, &cur_map);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
if (num_pulls) {
|
2013-03-28 13:09:57 +08:00
|
|
|
err = of_property_read_u32_index(np, "brcm,pull",
|
2016-03-01 09:30:08 +08:00
|
|
|
(num_pulls > 1) ? i : 0, &pull);
|
2013-03-28 13:09:57 +08:00
|
|
|
if (err)
|
|
|
|
|
goto out;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
err = bcm2835_pctl_dt_node_to_map_pull(pc, np, pin,
|
|
|
|
|
pull, &cur_map);
|
|
|
|
|
if (err)
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
*map = maps;
|
|
|
|
|
*num_maps = num_pins * maps_per_pin;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
out:
|
2015-12-21 08:44:04 +08:00
|
|
|
bcm2835_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2013-02-16 17:25:07 +08:00
|
|
|
static const struct pinctrl_ops bcm2835_pctl_ops = {
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.get_groups_count = bcm2835_pctl_get_groups_count,
|
|
|
|
|
.get_group_name = bcm2835_pctl_get_group_name,
|
|
|
|
|
.get_group_pins = bcm2835_pctl_get_group_pins,
|
|
|
|
|
.pin_dbg_show = bcm2835_pctl_pin_dbg_show,
|
|
|
|
|
.dt_node_to_map = bcm2835_pctl_dt_node_to_map,
|
|
|
|
|
.dt_free_map = bcm2835_pctl_dt_free_map,
|
|
|
|
|
};
|
|
|
|
|
|
2016-05-06 19:32:47 +08:00
|
|
|
static int bcm2835_pmx_free(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned offset)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
|
|
|
|
|
/* disable by setting to GPIO_IN */
|
|
|
|
|
bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
|
|
|
|
|
{
|
|
|
|
|
return BCM2835_FSEL_COUNT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned selector)
|
|
|
|
|
{
|
|
|
|
|
return bcm2835_functions[selector];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned selector,
|
|
|
|
|
const char * const **groups,
|
|
|
|
|
unsigned * const num_groups)
|
|
|
|
|
{
|
|
|
|
|
/* every pin can do every function */
|
|
|
|
|
*groups = bcm2835_gpio_groups;
|
|
|
|
|
*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2014-09-03 19:02:56 +08:00
|
|
|
static int bcm2835_pmx_set(struct pinctrl_dev *pctldev,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
unsigned func_selector,
|
|
|
|
|
unsigned group_selector)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
|
|
|
|
|
bcm2835_pinctrl_fsel_set(pc, group_selector, func_selector);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
|
|
|
|
|
struct pinctrl_gpio_range *range,
|
|
|
|
|
unsigned offset)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
|
|
|
|
|
/* disable by setting to GPIO_IN */
|
|
|
|
|
bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
|
|
|
|
|
struct pinctrl_gpio_range *range,
|
|
|
|
|
unsigned offset,
|
|
|
|
|
bool input)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
enum bcm2835_fsel fsel = input ?
|
|
|
|
|
BCM2835_FSEL_GPIO_IN : BCM2835_FSEL_GPIO_OUT;
|
|
|
|
|
|
|
|
|
|
bcm2835_pinctrl_fsel_set(pc, offset, fsel);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2013-02-16 17:25:07 +08:00
|
|
|
static const struct pinmux_ops bcm2835_pmx_ops = {
|
2016-05-06 19:32:47 +08:00
|
|
|
.free = bcm2835_pmx_free,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.get_functions_count = bcm2835_pmx_get_functions_count,
|
|
|
|
|
.get_function_name = bcm2835_pmx_get_function_name,
|
|
|
|
|
.get_function_groups = bcm2835_pmx_get_function_groups,
|
2014-09-03 19:02:56 +08:00
|
|
|
.set_mux = bcm2835_pmx_set,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.gpio_disable_free = bcm2835_pmx_gpio_disable_free,
|
|
|
|
|
.gpio_set_direction = bcm2835_pmx_gpio_set_direction,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned pin, unsigned long *config)
|
|
|
|
|
{
|
|
|
|
|
/* No way to read back config in HW */
|
|
|
|
|
return -ENOTSUPP;
|
|
|
|
|
}
|
|
|
|
|
|
2018-05-01 08:42:13 +08:00
|
|
|
static void bcm2835_pull_config_set(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned int pin, unsigned int arg)
|
|
|
|
|
{
|
|
|
|
|
u32 off, bit;
|
|
|
|
|
|
|
|
|
|
off = GPIO_REG_OFFSET(pin);
|
|
|
|
|
bit = GPIO_REG_SHIFT(pin);
|
|
|
|
|
|
|
|
|
|
bcm2835_gpio_wr(pc, GPPUD, arg & 3);
|
|
|
|
|
/*
|
|
|
|
|
* BCM2835 datasheet say to wait 150 cycles, but not of what.
|
|
|
|
|
* But the VideoCore firmware delay for this operation
|
|
|
|
|
* based nearly on the same amount of VPU cycles and this clock
|
|
|
|
|
* runs at 250 MHz.
|
|
|
|
|
*/
|
|
|
|
|
udelay(1);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit));
|
|
|
|
|
udelay(1);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0);
|
|
|
|
|
}
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
|
2018-05-01 08:42:13 +08:00
|
|
|
unsigned int pin, unsigned long *configs,
|
|
|
|
|
unsigned int num_configs)
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
2018-05-01 08:42:13 +08:00
|
|
|
u32 param, arg;
|
2013-08-28 02:32:12 +08:00
|
|
|
int i;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
2013-08-28 02:32:12 +08:00
|
|
|
for (i = 0; i < num_configs; i++) {
|
2018-05-01 08:42:13 +08:00
|
|
|
param = pinconf_to_config_param(configs[i]);
|
|
|
|
|
arg = pinconf_to_config_argument(configs[i]);
|
|
|
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
|
/* Set legacy brcm,pull */
|
|
|
|
|
case BCM2835_PINCONF_PARAM_PULL:
|
|
|
|
|
bcm2835_pull_config_set(pc, pin, arg);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Set pull generic bindings */
|
|
|
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
|
|
|
bcm2835_pull_config_set(pc, pin, BCM2835_PUD_OFF);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
|
|
|
bcm2835_pull_config_set(pc, pin, BCM2835_PUD_DOWN);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
|
|
|
bcm2835_pull_config_set(pc, pin, BCM2835_PUD_UP);
|
|
|
|
|
break;
|
2013-08-28 02:32:12 +08:00
|
|
|
|
2018-05-01 08:42:14 +08:00
|
|
|
/* Set output-high or output-low */
|
|
|
|
|
case PIN_CONFIG_OUTPUT:
|
|
|
|
|
bcm2835_gpio_set_bit(pc, arg ? GPSET0 : GPCLR0, pin);
|
|
|
|
|
break;
|
|
|
|
|
|
2018-05-01 08:42:13 +08:00
|
|
|
default:
|
2019-02-03 21:02:34 +08:00
|
|
|
return -ENOTSUPP;
|
2013-08-28 02:32:12 +08:00
|
|
|
|
2018-05-01 08:42:13 +08:00
|
|
|
} /* switch param type */
|
2013-08-28 02:32:12 +08:00
|
|
|
} /* for each config */
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2013-02-16 17:25:07 +08:00
|
|
|
static const struct pinconf_ops bcm2835_pinconf_ops = {
|
2019-02-03 21:02:33 +08:00
|
|
|
.is_generic = true,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.pin_config_get = bcm2835_pinconf_get,
|
|
|
|
|
.pin_config_set = bcm2835_pinconf_set,
|
|
|
|
|
};
|
|
|
|
|
|
2019-07-22 14:23:25 +08:00
|
|
|
static void bcm2711_pull_config_set(struct bcm2835_pinctrl *pc,
|
|
|
|
|
unsigned int pin, unsigned int arg)
|
|
|
|
|
{
|
|
|
|
|
u32 shifter;
|
|
|
|
|
u32 value;
|
|
|
|
|
u32 off;
|
|
|
|
|
|
|
|
|
|
off = PUD_2711_REG_OFFSET(pin);
|
|
|
|
|
shifter = PUD_2711_REG_SHIFT(pin);
|
|
|
|
|
|
|
|
|
|
value = bcm2835_gpio_rd(pc, GP_GPIO_PUP_PDN_CNTRL_REG0 + (off * 4));
|
|
|
|
|
value &= ~(PUD_2711_MASK << shifter);
|
|
|
|
|
value |= (arg << shifter);
|
|
|
|
|
bcm2835_gpio_wr(pc, GP_GPIO_PUP_PDN_CNTRL_REG0 + (off * 4), value);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int bcm2711_pinconf_set(struct pinctrl_dev *pctldev,
|
|
|
|
|
unsigned int pin, unsigned long *configs,
|
|
|
|
|
unsigned int num_configs)
|
|
|
|
|
{
|
|
|
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
|
u32 param, arg;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < num_configs; i++) {
|
|
|
|
|
param = pinconf_to_config_param(configs[i]);
|
|
|
|
|
arg = pinconf_to_config_argument(configs[i]);
|
|
|
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
|
/* convert legacy brcm,pull */
|
|
|
|
|
case BCM2835_PINCONF_PARAM_PULL:
|
|
|
|
|
if (arg == BCM2835_PUD_UP)
|
|
|
|
|
arg = BCM2711_PULL_UP;
|
|
|
|
|
else if (arg == BCM2835_PUD_DOWN)
|
|
|
|
|
arg = BCM2711_PULL_DOWN;
|
|
|
|
|
else
|
|
|
|
|
arg = BCM2711_PULL_NONE;
|
|
|
|
|
|
|
|
|
|
bcm2711_pull_config_set(pc, pin, arg);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Set pull generic bindings */
|
|
|
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
|
|
|
bcm2711_pull_config_set(pc, pin, BCM2711_PULL_NONE);
|
|
|
|
|
break;
|
|
|
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
|
|
|
bcm2711_pull_config_set(pc, pin, BCM2711_PULL_DOWN);
|
|
|
|
|
break;
|
|
|
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
|
|
|
bcm2711_pull_config_set(pc, pin, BCM2711_PULL_UP);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Set output-high or output-low */
|
|
|
|
|
case PIN_CONFIG_OUTPUT:
|
|
|
|
|
bcm2835_gpio_set_bit(pc, arg ? GPSET0 : GPCLR0, pin);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
return -ENOTSUPP;
|
|
|
|
|
}
|
|
|
|
|
} /* for each config */
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct pinconf_ops bcm2711_pinconf_ops = {
|
|
|
|
|
.is_generic = true,
|
|
|
|
|
.pin_config_get = bcm2835_pinconf_get,
|
|
|
|
|
.pin_config_set = bcm2711_pinconf_set,
|
|
|
|
|
};
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
static struct pinctrl_desc bcm2835_pinctrl_desc = {
|
|
|
|
|
.name = MODULE_NAME,
|
|
|
|
|
.pins = bcm2835_gpio_pins,
|
|
|
|
|
.npins = ARRAY_SIZE(bcm2835_gpio_pins),
|
|
|
|
|
.pctlops = &bcm2835_pctl_ops,
|
|
|
|
|
.pmxops = &bcm2835_pmx_ops,
|
|
|
|
|
.confops = &bcm2835_pinconf_ops,
|
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
|
};
|
|
|
|
|
|
2012-11-20 02:25:13 +08:00
|
|
|
static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
.name = MODULE_NAME,
|
|
|
|
|
.npins = BCM2835_NUM_GPIOS,
|
|
|
|
|
};
|
|
|
|
|
|
2019-07-22 14:23:25 +08:00
|
|
|
static const struct of_device_id bcm2835_pinctrl_match[] = {
|
|
|
|
|
{
|
|
|
|
|
.compatible = "brcm,bcm2835-gpio",
|
|
|
|
|
.data = &bcm2835_pinconf_ops,
|
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
.compatible = "brcm,bcm2711-gpio",
|
|
|
|
|
.data = &bcm2711_pinconf_ops,
|
|
|
|
|
},
|
|
|
|
|
{}
|
|
|
|
|
};
|
|
|
|
|
|
2012-12-22 05:10:23 +08:00
|
|
|
static int bcm2835_pinctrl_probe(struct platform_device *pdev)
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
{
|
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
|
struct device_node *np = dev->of_node;
|
|
|
|
|
struct bcm2835_pinctrl *pc;
|
|
|
|
|
struct resource iomem;
|
|
|
|
|
int err, i;
|
2019-07-22 14:23:25 +08:00
|
|
|
const struct of_device_id *match;
|
|
|
|
|
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
|
|
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
|
|
|
|
|
|
|
|
|
|
pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
|
|
|
|
|
if (!pc)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, pc);
|
|
|
|
|
pc->dev = dev;
|
|
|
|
|
|
|
|
|
|
err = of_address_to_resource(np, 0, &iomem);
|
|
|
|
|
if (err) {
|
|
|
|
|
dev_err(dev, "could not get IO memory\n");
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2013-01-21 18:09:14 +08:00
|
|
|
pc->base = devm_ioremap_resource(dev, &iomem);
|
|
|
|
|
if (IS_ERR(pc->base))
|
|
|
|
|
return PTR_ERR(pc->base);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
|
|
|
|
|
pc->gpio_chip = bcm2835_gpio_chip;
|
2015-11-04 16:56:26 +08:00
|
|
|
pc->gpio_chip.parent = dev;
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
pc->gpio_chip.of_node = np;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < BCM2835_NUM_BANKS; i++) {
|
|
|
|
|
unsigned long events;
|
|
|
|
|
unsigned offset;
|
|
|
|
|
|
|
|
|
|
/* clear event detection flags */
|
|
|
|
|
bcm2835_gpio_wr(pc, GPREN0 + i * 4, 0);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPFEN0 + i * 4, 0);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPHEN0 + i * 4, 0);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPLEN0 + i * 4, 0);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPAREN0 + i * 4, 0);
|
|
|
|
|
bcm2835_gpio_wr(pc, GPAFEN0 + i * 4, 0);
|
|
|
|
|
|
|
|
|
|
/* clear all the events */
|
|
|
|
|
events = bcm2835_gpio_rd(pc, GPEDS0 + i * 4);
|
|
|
|
|
for_each_set_bit(offset, &events, 32)
|
|
|
|
|
bcm2835_gpio_wr(pc, GPEDS0 + i * 4, BIT(offset));
|
|
|
|
|
|
2018-10-27 16:15:33 +08:00
|
|
|
raw_spin_lock_init(&pc->irq_lock[i]);
|
2015-02-24 21:40:50 +08:00
|
|
|
}
|
|
|
|
|
|
2015-12-09 05:01:00 +08:00
|
|
|
err = gpiochip_add_data(&pc->gpio_chip, pc);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
if (err) {
|
|
|
|
|
dev_err(dev, "could not add GPIO chip\n");
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
err = gpiochip_irqchip_add(&pc->gpio_chip, &bcm2835_gpio_irq_chip,
|
|
|
|
|
0, handle_level_irq, IRQ_TYPE_NONE);
|
|
|
|
|
if (err) {
|
|
|
|
|
dev_info(dev, "could not add irqchip\n");
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < BCM2835_NUM_IRQS; i++) {
|
|
|
|
|
pc->irq[i] = irq_of_parse_and_map(np, i);
|
2017-06-22 02:20:04 +08:00
|
|
|
|
|
|
|
|
if (pc->irq[i] == 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
2016-11-15 01:48:19 +08:00
|
|
|
/*
|
|
|
|
|
* Use the same handler for all groups: this is necessary
|
|
|
|
|
* since we use one gpiochip to cover all lines - the
|
|
|
|
|
* irq handler then needs to figure out which group and
|
|
|
|
|
* bank that was firing the IRQ and look up the per-group
|
|
|
|
|
* and bank data.
|
|
|
|
|
*/
|
|
|
|
|
gpiochip_set_chained_irqchip(&pc->gpio_chip,
|
|
|
|
|
&bcm2835_gpio_irq_chip,
|
|
|
|
|
pc->irq[i],
|
|
|
|
|
bcm2835_gpio_irq_handler);
|
|
|
|
|
}
|
|
|
|
|
|
2019-07-22 14:23:25 +08:00
|
|
|
match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
|
|
|
|
|
if (match) {
|
|
|
|
|
bcm2835_pinctrl_desc.confops =
|
|
|
|
|
(const struct pinconf_ops *)match->data;
|
|
|
|
|
}
|
|
|
|
|
|
2016-02-24 17:14:07 +08:00
|
|
|
pc->pctl_dev = devm_pinctrl_register(dev, &bcm2835_pinctrl_desc, pc);
|
2015-06-09 12:01:16 +08:00
|
|
|
if (IS_ERR(pc->pctl_dev)) {
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
gpiochip_remove(&pc->gpio_chip);
|
2015-06-09 12:01:16 +08:00
|
|
|
return PTR_ERR(pc->pctl_dev);
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pc->gpio_range = bcm2835_pinctrl_gpio_range;
|
|
|
|
|
pc->gpio_range.base = pc->gpio_chip.base;
|
|
|
|
|
pc->gpio_range.gc = &pc->gpio_chip;
|
|
|
|
|
pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static struct platform_driver bcm2835_pinctrl_driver = {
|
|
|
|
|
.probe = bcm2835_pinctrl_probe,
|
|
|
|
|
.driver = {
|
|
|
|
|
.name = MODULE_NAME,
|
|
|
|
|
.of_match_table = bcm2835_pinctrl_match,
|
2017-05-23 04:56:48 +08:00
|
|
|
.suppress_bind_attrs = true,
|
pinctrl: add bcm2835 driver
The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt
controller, and pinmux/control device.
Original driver by Simon Arlott.
Rewrite including GPIO chip device by Chris Boot.
Upstreaming changes by Stephen Warren:
* Wrote DT binding documentation.
* Changed brcm,function to an integer to more directly match the
datasheet, and to match brcm,pins being an integer.
* Implemented pull-up/down pin config.
* Removed read-only DT property and related code. The restriction this
implemented are driven by the board, not the GPIO HW block, so don't
really make sense of a HW block binding, were in general incomplete
(since they could only know about the few pins hard-coded into the
Raspberry Pi B board design and not the uncommitted GPIOS), and are
better represented simply by not writing incorrect data into pin
configuration nodes.
* Don't set GPIO_IN function select in gpio_request_enable() to avoid
glitches; defer this to gpio_set_direction(). Consequently, removed
empty bcm2835_pmx_gpio_request_enable().
* Simplified enabled_irq_map[]; make it explicitly 1 entry per bank.
* Lifted use of enabled_irq_map[] outside the per-interrupt loop in
IRQ handler, thus fixing an issue where the code was indexing into
enabled_irq_map[] by intra-bank GPIO ID, not global GPIO ID.
* Removed locking in IRQ handler, since all other code uses
spin_lock_irqsave() and so guarantees it doesn't run concurrently
with the handler.
* Moved duplicated BUILD_BUG_ON()s into probe(). Also check size of
bcm2835_gpio_pins[].
* Remove range-checking from bcm2835_pctl_get_groups_count() since we've
decided to trust the pinctrl core.
* Made bcm2835_pmx_gpio_disable_free() call bcm2835_pinctrl_fsel_set()
directly for simplicity.
* Fixed body of dt_free_map() to match latest dt_node_to_map().
* Removed GPIO ownership check from bcm2835_pmx_enable() since the pinctrl
core owns doing this.
* Made irq_chip and pinctrl_gpio_range .name == MODULE_NAME so it's more
descriptive.
* Simplified remove(); removed call to non-existent
pinctrl_remove_gpio_range(), remove early return on error.
* Don't force gpiochip's base to 0. Set gpio_range.base to gpiochip's
base GPIO number.
* Error-handling cleanups in probe().
* Switched to module_platform_driver() rather than open-coding.
* Made pin, group, and function names lower-case.
* s/broadcom/brcm/ in DT property names.
* s/2708/2835/.
* Fixed a couple minor checkpatch warnings, and other minor cleanup.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Chris Boot <bootc@bootc.net>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-09-28 12:10:11 +08:00
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},
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};
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2017-05-23 04:56:48 +08:00
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builtin_platform_driver(bcm2835_pinctrl_driver);
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