Commit Graph

4801 Commits

Author SHA1 Message Date
Linus Walleij 27b5ea2fcb Merge branch 'devel' into for-next 2020-11-11 17:38:21 +01:00
Damien Le Moal b72de3ff19 gpio: sifive: Fix SiFive gpio probe
Fix the check on the number of IRQs to allow up to the maximum (32)
instead of only the maximum minus one.

Fixes: 96868dce64 ("gpio/sifive: Add GPIO driver for SiFive SoCs")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Link: https://lore.kernel.org/r/20201107081420.60325-10-damien.lemoal@wdc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-11-11 09:53:09 +01:00
Linus Walleij 45fe0b539b gpio fixes for v5.10-rc3
- fix missing conversion to gpiolib irqchip in gpio-dwapb
 - fix bank properties for ast2600 variant in gpio-aspeed
 - make sysfs work again when the character device is disabled
 - fix interrupt handling in gpio-pcie-idio-24
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Merge tag 'gpio-fixes-for-v5.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into fixes

gpio fixes for v5.10-rc3

- fix missing conversion to gpiolib irqchip in gpio-dwapb
- fix bank properties for ast2600 variant in gpio-aspeed
- make sysfs work again when the character device is disabled
- fix interrupt handling in gpio-pcie-idio-24
2020-11-10 14:13:20 +01:00
Dmitry Osipenko 37174f3341 gpio: tegra: Use raw_spinlock
Use raw_spinlock in order to fix spurious messages about invalid context
when spinlock debugging is enabled. This happens because there is a legit
nested raw_spinlock->spinlock locking usage within IRQ-related code. IRQ
core uses raw spinlock and then Tegra GPIO driver uses a nested spinlock.
The debug code can't recognize and handle this case, hence we need to use
raw spinlock in the GPIO driver.

 [ BUG: Invalid wait context ]
 ...
  (dump_stack) from (__lock_acquire)
  (__lock_acquire) from (lock_acquire)
  (lock_acquire) from (_raw_spin_lock_irqsave)
  (_raw_spin_lock_irqsave) from (tegra_gpio_irq_set_type)
  (tegra_gpio_irq_set_type) from (__irq_set_trigger)
  (__irq_set_trigger) from (__setup_irq)
  (__setup_irq) from (request_threaded_irq)
  (request_threaded_irq) from (devm_request_threaded_irq)
  (devm_request_threaded_irq) from (elants_i2c_probe)
  (elants_i2c_probe) from (i2c_device_probe)
 ...

Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06 15:30:47 +01:00
Dmitry Osipenko 6ea68fc0a6 gpio: tegra: Add lockdep class
Add lockdep class in order to fix debug warnings that are coming from a
legit nested use of irq_set_irq_wake() by the Tegra GPIO driver.

 WARNING: possible recursive locking detected
 ...
  (irq_set_irq_wake) from (tegra_gpio_irq_set_wake)
  (tegra_gpio_irq_set_wake) from (irq_set_irq_wake)
  (irq_set_irq_wake) from (brcmf_sdiod_intr_register [brcmfmac])
 ...

Tested-by: Peter Geis <pgwipeout@gmail.com>
Reported-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06 15:30:37 +01:00
Arnaud de Turckheim 10a2f11d3c gpio: pcie-idio-24: Enable PEX8311 interrupts
This enables the PEX8311 internal PCI wire interrupt and the PEX8311
local interrupt input so the local interrupts are forwarded to the PCI.

Fixes: 5855620466 ("gpio: Add GPIO support for the ACCES PCIe-IDIO-24 family")
Cc: stable@vger.kernel.org
Signed-off-by: Arnaud de Turckheim <quarium@gmail.com>
Reviewed-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06 15:19:44 +01:00
Arnaud de Turckheim 23a7fdc06e gpio: pcie-idio-24: Fix IRQ Enable Register value
This fixes the COS Enable Register value for enabling/disabling the
corresponding IRQs bank.

Fixes: 5855620466 ("gpio: Add GPIO support for the ACCES PCIe-IDIO-24 family")
Cc: stable@vger.kernel.org
Signed-off-by: Arnaud de Turckheim <quarium@gmail.com>
Reviewed-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06 15:18:58 +01:00
Arnaud de Turckheim d8f270efea gpio: pcie-idio-24: Fix irq mask when masking
Fix the bitwise operation to remove only the corresponding bit from the
mask.

Fixes: 5855620466 ("gpio: Add GPIO support for the ACCES PCIe-IDIO-24 family")
Cc: stable@vger.kernel.org
Signed-off-by: Arnaud de Turckheim <quarium@gmail.com>
Reviewed-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-06 15:18:25 +01:00
Kent Gibson 1f5eb8b17f gpiolib: fix sysfs when cdev is not selected
In gpiochip_setup_dev() the call to gpiolib_cdev_register() indirectly
calls device_add().  This is still required for the sysfs even when
CONFIG_GPIO_CDEV is not selected in the build.

Replace the stubbed functions in gpiolib-cdev.h with macros in gpiolib.c
that perform the required device_add() and device_del() when
CONFIG_GPIO_CDEV is not selected.

Fixes: d143493c01 (gpiolib: make cdev a build option)
Reported-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Tested-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-11-05 15:35:40 +01:00
Geert Uytterhoeven 183245c4f2 gpio: rcar: Implement gpio_chip.get_multiple()
Add support for getting the state of multiple pins using a minimum of
register reads.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30 15:57:41 +01:00
Geert Uytterhoeven 208c80f14b gpio: rcar: Rework hardware features handling
Reuse gpio_rcar_info inside gpio_rcar_priv instead of duplicating the
individual members, so gpio_rcar_parse_dt() can copy them in one go.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30 15:57:33 +01:00
Geert Uytterhoeven 677d7d613a gpio: rcar: Align register offsets
Improve readability by aligning the offsets in the register definitions.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30 15:57:20 +01:00
Geert Uytterhoeven 714d3a2958 gpio: rcar: Cache gpiochip_get_data() return value
Since commit 43c54ecade ("gpio: move the subdriver data pointer
into gpio_device") changed gpiochip_get_data() to an out-of-line
function, it is now worthwhile to avoid multiple calls in a row by
caching its return value in a local variable.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30 15:57:12 +01:00
Kent Gibson 5e2ca893d7 gpiolib: cdev: add GPIO_V2_LINE_FLAG_EDGE_BOTH and use it in edge_irq_thread()
Add GPIO_V2_LINE_FLAG_EDGE_BOTH macro and use it in edge_irq_thread() to
improve readability of edge handling cases.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-30 15:53:19 +01:00
Deepak R Varma b9bf97105f gpio: 104-idi-48: improve code indentation
Address code indentation warning messages by checkpatch script. Combine
split function parameters on one line. This also resolves the "use tabs
instead of space" warning by checkpatch script.

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>

Link: https://lore.kernel.org/r/20201013190212.GA85788@ubuntu204
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-29 14:58:00 +01:00
Vincent Whitchurch 43ddebdd09 gpio: mockup: Allow probing from device tree
Allow the mockup driver to be probed via the device tree without any
module parameters, allowing it to be used to configure and test higher
level drivers like the leds-gpio driver and corresponding userspace
before actual hardware is available.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-29 10:39:09 +01:00
Tony Lindgren 7ffa081698 Revert "Revert "gpio: omap: Fix lost edge wake-up interrupts""
This reverts commit 579ced8fdb.

Turns out I was overly optimistic about cpu_pm blocking idle being a
solution for handling edge interrupts. While it helps in preventing
entering idle states that potentially lose context, we can still get
an edge interrupt triggering while entering idle. So we need to also
add back the workaround for seeing if there are any pending edge
interrupts when waking up.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Link: https://lore.kernel.org/r/20201028060556.56038-1-tony@atomide.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-28 16:40:47 +01:00
Linus Walleij 8aa1633505 gpio: stmpe: Fix forgotten refactoring
We actually handle the gpio_irq_chip set-up properly
now despite what the comment says. Also assign this
pointer along with the rest of the gpio_irq_chip
setup code.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201019134429.65563-1-linus.walleij@linaro.org
2020-10-28 15:51:27 +01:00
Linus Walleij f1f37abbe6 gpio: Retire the explicit gpio irqchip code
Now that all gpiolib irqchip users have been over to use
the irqchip template, we can finally retire the old code
path and leave just one way in to the irqchip: set up the
template when registering the gpio_chip. For a while
we had two code paths for this which was a bit confusing.

This brings this work to a conclusion, there is now one
way of doing this.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Link: https://lore.kernel.org/r/20201019134046.65101-1-linus.walleij@linaro.org
2020-10-28 15:50:06 +01:00
Andy Shevchenko 163d1719d3 gpiolib: Switch to use compat_need_64bit_alignment_fixup() helper
Use the new compat_need_64bit_alignment_fixup() helper to avoid
ugly ifdeffery in IOCTL compatibility code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Kent Gibson <warthog618@gmail.com>
Depends-on: 527c412519 ("compat: add a compat_need_64bit_alignment_fixup() helper")
Link: https://lore.kernel.org/r/20201014103315.82662-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-28 15:47:00 +01:00
Andy Shevchenko 9ef6293c06 gpiolib: Use proper type for bias enumerator in gpio_set_bias()
First of all, bias has a special type as being a part of enum pin_config_param.
Second, 0 is also defined bias which is equivalent to BUS_HOLD.

Taking into account above, change type of bias variable and refactor
gpio_set_bias() in a way that it doesn't use BUS_HOLD as a place holder.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201009184359.16427-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-28 15:47:00 +01:00
Billy Tsai 560b6ac37a gpio: aspeed: fix ast2600 bank properties
GPIO_T is mapped to the most significant byte of input/output mask, and
the byte in "output" mask should be 0 because GPIO_T is input only. All
the other bits need to be 1 because GPIO_Q/R/S support both input and
output modes.

Fixes: ab4a85534c ("gpio: aspeed: Add in ast2600 details to Aspeed driver")
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:51:57 +01:00
Jia He 3fe37204c9 gpio: dwapb: Fix missing conversion to GPIO-lib-based IRQ-chip
Commit 0ea683931a ("gpio: dwapb: Convert driver to using the
GPIO-lib-based IRQ-chip") missed the case in dwapb_irq_set_wake().

Without this fix, probing the dwapb gpio driver will hit a error:
"address between user and kernel address ranges" on a Ampere armv8a
server and cause a panic.

Fixes: 0ea683931a ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip")
Signed-off-by: Jia He <justin.he@arm.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:48:25 +01:00
Andy Shevchenko 95d9f84fca gpiolib: split error path in gpiod_request_commit()
For better maintenance and micro optimization split error path
in the gpiod_request_commit().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:43:41 +01:00
Andy Shevchenko 8bbff39c6c gpiolib: Unify expectations about ->request() returned value
Half of the code in the GPIO library is written in an expectation that
any non-zero value returned from the ->request() callback is an error code,
while some code checks only for negative values.

Unify expectations about ->request() returned value to be non-zero
for an error and 0 for the success.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:43:15 +01:00
Andy Shevchenko 40941954f6 gpiolib: of: Use named item for enum gpiod_flags variable
Use named item instead of plain integer for enum gpiod_flags
to make it clear that even 0 has its own meaning.

Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:35:55 +01:00
Kent Gibson 3ffb7c45d1 gpiolib: cdev: document that line eflags are shared
The line.eflags field is shared so document this fact and highlight it
throughout using READ_ONCE() and WRITE_ONCE() accessors.

Also use a local copy of the eflags in edge_irq_thread() to ensure
consistent control flow even if eflags changes.  This is only a defensive
measure as edge_irq_thread() is currently disabled when the eflags are
changed.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:26:31 +01:00
Andy Shevchenko 7b58696d9a gpiolib: Extract gpiod_not_found() helper
Several places in the code are using same idiom, i.e.
	IS_ERR(desc) && PTR_ERR(desc) == -ENOENT
which meaning is GPIO description is not found.

For better readability extract gpiod_not_found() helper and use it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-10-26 15:23:33 +01:00
Linus Torvalds 1a31c12371 - New Drivers
- Add support for initialising shared (between children) Regmaps
    - Add support for Kontron SL28CPLD
    - Add support for ENE KB3930 Embedded Controller
    - Add support for Intel FPGA PAC MAX 10 BMC
 
  - New Device Support
    - Add support for Power to Ricoh RN5T618
    - Add support for UART to Intel Lakefield
    - Add support for LP87524_Q1 to Texas Instruments LP87565
 
  - New Functionality
    - Device Tree; ene-kb3930, sl28cpld, syscon, lp87565, lp87524-q1
    - Use new helper dev_err_probe(); madera-core, stmfx, wcd934x
    - Use new GPIOD API; dm355evm_msp
    - Add wake-up capability; sprd-sc27xx-spi
    - Add ACPI support; kempld-core
 
  - Fix-ups
    - Trivial (spelling/whitespace); Kconfig, ab8500
    - Fix for unused variables; khadas-mcu, kempld-core
    - Remove unused header file(s); mt6360-core
    - Use correct IRQ flags in docs; act8945a, gateworks-gsc, rohm,bd70528-pmic
    - Add COMPILE_TEST support; asic3, tmio_core
    - Add dependency on I2C; SL28CPLD
 
  - Bug Fixes
    - Fix memory leak(s); sm501
    - Do not free regmap_config's 'name' until exit; syscon
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Merge tag 'mfd-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Add support for initialising shared (between children) Regmaps
   - Add support for Kontron SL28CPLD
   - Add support for ENE KB3930 Embedded Controller
   - Add support for Intel FPGA PAC MAX 10 BMC

  New Device Support:
   - Add support for Power to Ricoh RN5T618
   - Add support for UART to Intel Lakefield
   - Add support for LP87524_Q1 to Texas Instruments LP87565

  New Functionality:
   - Device Tree; ene-kb3930, sl28cpld, syscon, lp87565, lp87524-q1
   - Use new helper dev_err_probe(); madera-core, stmfx, wcd934x
   - Use new GPIOD API; dm355evm_msp
   - Add wake-up capability; sprd-sc27xx-spi
   - Add ACPI support; kempld-core

  Fix-ups:
   - Trivial (spelling/whitespace); Kconfig, ab8500
   - Fix for unused variables; khadas-mcu, kempld-core
   - Remove unused header file(s); mt6360-core
   - Use correct IRQ flags in docs; act8945a, gateworks-gsc, rohm,bd70528-pmic
   - Add COMPILE_TEST support; asic3, tmio_core
   - Add dependency on I2C; SL28CPLD

  Bug Fixes:
   - Fix memory leak(s); sm501
   - Do not free regmap_config's 'name' until exit; syscon"

* tag 'mfd-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (34 commits)
  mfd: kempld-core: Fix unused variable 'kempld_acpi_table' when !ACPI
  mfd: sl28cpld: Depend on I2C
  mfd: asic3: Build if COMPILE_TEST=y
  dt-bindings: mfd: Correct interrupt flags in examples
  mfd: Add ACPI support to Kontron PLD driver
  mfd: intel-m10-bmc: Add Intel MAX 10 BMC chip support for Intel FPGA PAC
  mfd: lp87565: Add LP87524-Q1 variant
  dt-bindings: mfd: Add LP87524-Q1
  dt-bindings: mfd: lp87565: Convert to yaml
  mfd: mt6360: Remove unused include <linux/version.h>
  mfd: sm501: Fix leaks in probe()
  mfd: syscon: Don't free allocated name for regmap_config
  dt-bindings: mfd: syscon: Document Exynos3 and Exynos5433 compatibles
  dt-bindings: mfd: syscon: Merge Samsung Exynos Sysreg bindings
  dt-bindings: mfd: ab8500: Remove weird Unicode characters
  mfd: sprd: Add wakeup capability for PMIC IRQ
  mfd: intel-lpss: Add device IDs for UART ports for Lakefield
  mfd: dm355evm_msp: Convert LEDs to GPIO descriptor table
  mfd: wcd934x: Simplify with dev_err_probe()
  mfd: stmfx: Simplify with dev_err_probe()
  ...
2020-10-14 15:56:58 -07:00
Linus Torvalds 0486beaf88 GPIO bulk changes for the v5.10 kernel cycle:
Core changes:
 
 - The big core change is the updated (v2) userspace character
   device API. This corrects badly designed 64-bit alignment around
   the line events. We also add the debounce request feature.
   This echoes the often quotes passage from Frederick Brooks
   "The mythical man-month" to always throw one away, which we
   have seen before in things such as V4L2. So we put in a new
   one and deprecate and obsolete the old one.
 
 - All example tools in tools/gpio/* are migrated to the new API
   to set a good example. The libgpiod userspace library has been
   augmented to use this new API pretty much from day 1.
 
 - Some misc API hardening by using strn* function calls has been
   added as well.
 
 - Use the simpler IDA interface for GPIO chip instance enumeration.
 
 - Add device core function for counting string arrays in
   device properties.
 
 - Provide a generic library function kfree_strarray() that can
   be used throughout the kernel.
 
 Driver enhancements:
 
 - The DesignWare dwapb-gpio driver has been enhanced and now
   uses the IRQ handling in the gpiolib core.
 
 - The mockup and aggregator drivers have seen some substantial
   code clean-up and now use more of the core kernel
   inftrastructure.
 
 - Misc cleanups using dev_err_probe().
 
 - The MXC drivers (Freescale/NXP) can now be built modularized,
   which makes modularized GKI Android kernels happy.
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Merge tag 'gpio-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This time very little driver changes but lots of core changes.

  We have some interesting cooperative work for ARM and Intel alike,
  making the GPIO subsystem more and more suitable for industrial
  systems and the like, in addition to the in-kernel users.

  We touch driver core (device properties) and lib/* by adding one
  simple string array free function, these are authored by Andy
  Shevchenko who is a well known and recognized core helpers maintainers
  so this should be fine.

  We also see some Android GKI-related modularization in the MXC
  drivers.

  Core changes:

   - The big core change is the updated (v2) userspace character device
     API.

     This corrects badly designed 64-bit alignment around the line
     events. We also add the debounce request feature. This echoes the
     often quotes passage from Frederick Brooks "The mythical man-month"
     to always throw one away, which we have seen before in things such
     as V4L2. So we put in a new one and deprecate and obsolete the old
     one.

   - All example tools in tools/gpio/* are migrated to the new API to
     set a good example. The libgpiod userspace library has been
     augmented to use this new API pretty much from day 1.

   - Some misc API hardening by using strn* function calls has been
     added as well.

   - Use the simpler IDA interface for GPIO chip instance enumeration.

   - Add device core function for counting string arrays in device
     properties.

   - Provide a generic library function kfree_strarray() that can be
     used throughout the kernel.

  Driver enhancements:

   - The DesignWare dwapb-gpio driver has been enhanced and now uses the
     IRQ handling in the gpiolib core.

   - The mockup and aggregator drivers have seen some substantial code
     clean-up and now use more of the core kernel inftrastructure.

   - Misc cleanups using dev_err_probe().

   - The MXC drivers (Freescale/NXP) can now be built modularized, which
     makes modularized GKI Android kernels happy"

* tag 'gpio-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (73 commits)
  gpiolib: Update header block in gpiolib-cdev.h
  gpiolib: cdev: switch from kstrdup() to kstrndup()
  docs: gpio: add a new document to its index.rst
  gpio: pca953x: Add support for the NXP PCAL9554B/C
  tools: gpio: add debounce support to gpio-event-mon
  tools: gpio: add multi-line monitoring to gpio-event-mon
  tools: gpio: port gpio-event-mon to v2 uAPI
  tools: gpio: port gpio-hammer to v2 uAPI
  tools: gpio: rename nlines to num_lines
  tools: gpio: port gpio-watch to v2 uAPI
  tools: gpio: port lsgpio to v2 uAPI
  gpio: uapi: document uAPI v1 as deprecated
  gpiolib: cdev: support setting debounce
  gpiolib: cdev: support GPIO_V2_LINE_SET_VALUES_IOCTL
  gpiolib: cdev: support GPIO_V2_LINE_SET_CONFIG_IOCTL
  gpiolib: cdev: support edge detection for uAPI v2
  gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL
  gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL
  gpiolib: add build option for CDEV v1 ABI
  gpiolib: make cdev a build option
  ...
2020-10-13 10:09:33 -07:00
Linus Torvalds c457cc800e Updates for the interrupt subsystem:
Core:
     - Allow trimming of interrupt hierarchy to support odd hardware setups
       where only a subset of the interrupts requires the full hierarchy.
 
     - Allow the retrigger mechanism to follow a hierarchy to simplify
       driver code.
 
     - Provide a mechanism to force enable wakeup interrrupts on suspend.
 
     - More infrastructure to handle IPIs in the core code
 
  Architectures:
 
     - Convert ARM/ARM64 IPI handling to utilize the interrupt core code.
 
  Drivers:
 
     - The usual pile of new interrupt chips (MStar, Actions Owl, TI PRUSS,
       Designware ICTL)
 
     - ARM(64) IPI related conversions
 
     - Wakeup support for Qualcom PDC
 
     - Prevent hierarchy corruption in the NVIDIA Tegra driver
 
     - The usual small fixes, improvements and cleanups all over the place.
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Merge tag 'irq-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Updates for the interrupt subsystem:

  Core:
   - Allow trimming of interrupt hierarchy to support odd hardware
     setups where only a subset of the interrupts requires the full
     hierarchy.

   - Allow the retrigger mechanism to follow a hierarchy to simplify
     driver code.

   - Provide a mechanism to force enable wakeup interrrupts on suspend.

   - More infrastructure to handle IPIs in the core code

  Architectures:
   - Convert ARM/ARM64 IPI handling to utilize the interrupt core code.

  Drivers:
   - The usual pile of new interrupt chips (MStar, Actions Owl, TI
     PRUSS, Designware ICTL)

   - ARM(64) IPI related conversions

   - Wakeup support for Qualcom PDC

   - Prevent hierarchy corruption in the NVIDIA Tegra driver

   - The usual small fixes, improvements and cleanups all over the
     place"

* tag 'irq-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (59 commits)
  dt-bindings: interrupt-controller: Add MStar interrupt controller
  irqchip/irq-mst: Add MStar interrupt controller support
  soc/tegra: pmc: Don't create fake interrupt hierarchy levels
  soc/tegra: pmc: Allow optional irq parent callbacks
  gpio: tegra186: Allow optional irq parent callbacks
  genirq/irqdomain: Allow partial trimming of irq_data hierarchy
  irqchip/qcom-pdc: Reset PDC interrupts during init
  irqchip/qcom-pdc: Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag
  pinctrl: qcom: Set IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag
  genirq/PM: Introduce IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND flag
  pinctrl: qcom: Use return value from irq_set_wake() call
  pinctrl: qcom: Set IRQCHIP_SET_TYPE_MASKED and IRQCHIP_MASK_ON_SUSPEND flags
  ARM: Handle no IPI being registered in show_ipi_list()
  MAINTAINERS: Add entries for Actions Semi Owl SIRQ controller
  irqchip: Add Actions Semi Owl SIRQ controller
  dt-bindings: interrupt-controller: Add Actions SIRQ controller binding
  dt-bindings: dw-apb-ictl: Update binding to describe use as primary interrupt controller
  irqchip/dw-apb-ictl: Add primary interrupt controller support
  irqchip/dw-apb-ictl: Refactor priot to introducing hierarchical irq domains
  genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER
  ...
2020-10-12 11:34:32 -07:00
Marc Zyngier 986ec63d44 gpio: tegra186: Allow optional irq parent callbacks
Make the tegra186 GPIO driver resistent to variable depth
interrupt hierarchy, which we are about to introduce.

No functionnal change yet.

Signed-off-by: Marc Zyngier <maz@kernel.org>
2020-10-10 12:12:10 +01:00
Andy Shevchenko fc709df553 gpiolib: Update header block in gpiolib-cdev.h
The dev_t is defined in types.h while struct gpio_device forward declaration
is missed. Take into account above and update header block in gpiolib-cdev.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201005095622.73616-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-08 22:57:16 +02:00
Kent Gibson f188ac1251 gpiolib: cdev: switch from kstrdup() to kstrndup()
Use kstrndup() to copy line labels from the userspace provided char
array, rather than ensuring the char array contains a null terminator
and using kstrdup().

Note that the length provided to kstrndup() still assumes that the char
array does contain a null terminator, so the maximum string length is one
less than the array.  This is consistent with the previous behaviour.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20201005070246.20927-1-warthog618@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-08 22:57:16 +02:00
Marc Zyngier 8b81edd80b gpio: pca953x: Survive spurious interrupts
The pca953x driver never checks the result of irq_find_mapping(),
which returns 0 when no mapping is found. When a spurious interrupt
is delivered (which can happen under obscure circumstances), the
kernel explodes as it still tries to handle the error code as
a real interrupt.

Handle this particular case and warn on spurious interrupts.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201005140217.1390851-1-maz@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-07 11:47:41 +02:00
Andy Shevchenko 47e538d86d gpiolib: Disable compat ->read() code in UML case
It appears that UML (arch/um) has no compat.h header defined and hence
can't compile a recently provided piece of code in GPIO library.

Disable compat ->read() code in UML case to avoid compilation errors.

While at it, use pattern which is already being used in the kernel elsewhere.

Fixes: 5ad284ab3a ("gpiolib: Fix line event handling in syscall compatible mode")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201005131044.87276-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-07 11:42:03 +02:00
Linus Torvalds 0bf0dfda00 Some late GPIO fixes for the v5.9 series:
- Fix compiler warnings on the OMAP when PM is disabled
 
 - Clear the interrupt when setting edge sensitivity on the
   Spreadtrum driver.
 
 - Fix up spurious interrupts on the TC35894.
 
 - Support threaded interrupts on the Siox controller.
 
 - Fix resource leaks on the mockup driver.
 
 - Fix line event handling in syscall compatible mode
   for the character device.
 
 - Fix an unitialized variable in the PCA953A driver.
 
 - Fix access to all GPIO IRQs on the Aspeed AST2600.
 
 - Fix line direction on the AMD FCH driver.
 
 - Use the bitmap API instead of compiler intrinsics for
   bit manipulation in the PCA953x driver.
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Merge tag 'gpio-v5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Some late GPIO fixes for the v5.9 series:

   - Fix compiler warnings on the OMAP when PM is disabled

   - Clear the interrupt when setting edge sensitivity on the Spreadtrum
     driver.

   - Fix up spurious interrupts on the TC35894.

   - Support threaded interrupts on the Siox controller.

   - Fix resource leaks on the mockup driver.

   - Fix line event handling in syscall compatible mode for the
     character device.

   - Fix an unitialized variable in the PCA953A driver.

   - Fix access to all GPIO IRQs on the Aspeed AST2600.

   - Fix line direction on the AMD FCH driver.

   - Use the bitmap API instead of compiler intrinsics for bit
     manipulation in the PCA953x driver"

* tag 'gpio-v5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: pca953x: Correctly initialize registers 6 and 7 for PCA957x
  gpio: pca953x: Use bitmap API over implicit GCC extension
  gpio: amd-fch: correct logic of GPIO_LINE_DIRECTION
  gpio: aspeed: fix ast2600 bank properties
  gpio/aspeed-sgpio: don't enable all interrupts by default
  gpio/aspeed-sgpio: enable access to all 80 input & output sgpios
  gpio: pca953x: Fix uninitialized pending variable
  gpiolib: Fix line event handling in syscall compatible mode
  gpio: mockup: fix resource leak in error path
  gpio: siox: explicitly support only threaded irqs
  gpio: tc35894: fix up tc35894 interrupt configuration
  gpio: sprd: Clear interrupt when setting the type as edge
  gpio: omap: Fix warnings if PM is disabled
2020-10-02 09:51:42 -07:00
Andy Shevchenko 8c1f1c3477 gpio: pca953x: Correctly initialize registers 6 and 7 for PCA957x
When driver has been converted to the bitmap API the non-bitmap functions
started behaving differently on 32-bit BE architectures since the bytes in
two consequent unsigned longs are in different order in comparison to byte
array. Hence if the chip had had more than 32 lines the memset() call over
it would have not set up upper lines correctly.
Although it's currently a theoretical case (no supported chips of this type
has 32+ lines), it's better to provide a clean code to avoid people thinking
this is okay and potentially producing not fully working things.

Fixes: 35d13d9489 ("gpio: pca953x: convert to use bitmap API")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200930142013.59247-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-01 10:00:18 +02:00
Andy Shevchenko e09e200e07 gpio: pca953x: Use bitmap API over implicit GCC extension
In IRQ handler we have to clear bitmap before use. Currently
the GCC extension has been used for that. For sake of the consistency
switch to bitmap API. As expected bloat-o-meter shows no difference
in the object size.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200930142013.59247-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-10-01 10:00:17 +02:00
Mike Looijmans 237d96164f gpio: pca953x: Add support for the NXP PCAL9554B/C
The NXP PCAL9554B is a variant of the PCA953x GPIO expander,
with 8 GPIOs, latched interrupts and some advanced configuration
options. The "C" version only differs in I2C address.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200930092053.2114-2-mike.looijmans@topic.nl
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-09-30 11:50:34 +02:00
Kent Gibson 65cff70464 gpiolib: cdev: support setting debounce
Add support for setting debounce on a line via the GPIO uAPI.
Where debounce is not supported by hardware, a software debounce is
provided.

The implementation of the software debouncer waits for the line to be
stable for the debounce period before determining if a level change,
and a corresponding edge event, has occurred.  This provides maximum
protection against glitches, but also introduces a debounce_period
latency to edge events.

The software debouncer is integrated with the edge detection as it
utilises the line interrupt, and integration is simpler than getting
the two to interwork.  Where software debounce AND edge detection is
required, the debouncer provides both.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:57:04 +02:00
Kent Gibson 7b8e00d981 gpiolib: cdev: support GPIO_V2_LINE_SET_VALUES_IOCTL
Add support for the GPIO_V2_LINE_SET_VALUES_IOCTL.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:57:02 +02:00
Kent Gibson a54756cb24 gpiolib: cdev: support GPIO_V2_LINE_SET_CONFIG_IOCTL
Add support for GPIO_V2_LINE_SET_CONFIG_IOCTL, the uAPI v2
line set config ioctl.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:59 +02:00
Kent Gibson 73e0341992 gpiolib: cdev: support edge detection for uAPI v2
Add support for edge detection to lines requested using
GPIO_V2_GET_LINE_IOCTL.

The edge_detector implementation is based on the v1 lineevent
implementation.  Unlike the v1 implementation, an overflow of the event
buffer results in discarding older events, rather than the most
recent, so the final event in a burst will correspond to the current
state of the line.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:56 +02:00
Kent Gibson aad955842d gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL
Add support for GPIO_V2_GET_LINEINFO_IOCTL and
GPIO_V2_GET_LINEINFO_WATCH_IOCTL.

The core of this change is the event kfifo switching to contain
struct gpioline_info_changed_v2, instead of v1 as v2 is richer.

The two uAPI versions are mostly independent - other than where they both
provide line info changes via reads on the chip fd.  As the info change
structs differ between v1 and v2, the infowatch implementation tracks which
version of the infowatch ioctl, either GPIO_GET_LINEINFO_WATCH_IOCTL or
GPIO_V2_GET_LINEINFO_WATCH_IOCTL, initiates the initial watch and returns
the corresponding info change struct to the read.  The version supported
on that fd locks to that version on the first watch request, so subsequent
watches from that process must use the same uAPI version.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:52 +02:00
Kent Gibson 3c0d9c635a gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL
Add support for requesting lines using the GPIO_V2_GET_LINE_IOCTL, and
returning their current values using GPIO_V2_LINE_GET_VALUES_IOCTL.

The struct linereq implementation is based on the v1 struct linehandle
implementation.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:49 +02:00
Kent Gibson 957ebb61a4 gpiolib: add build option for CDEV v1 ABI
Add a build option to allow the removal of the CDEV v1 ABI.

Suggested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:46 +02:00
Kent Gibson d143493c01 gpiolib: make cdev a build option
Make the gpiolib-cdev module a build option.  This allows the CDEV
interface to be removed from the kernel to reduce kernel size in
applications where is it not required, and provides the parent for
other CDEV interface specific build options to follow.

Suggested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:42 +02:00
Kent Gibson 69e4e13688 gpiolib: cdev: replace strncpy() with strscpy()
Replace usage of strncpy() with strscpy() to remove -Wstringop-truncation
warnings.

The structures being populated are zeroed, to prevent stack leakage as
they are returned to userspace, so strscpy() performs the equivalent
function without the warnings.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:27 +02:00
Kent Gibson 0dc11e3ad3 gpiolib: cdev: gpio_desc_to_lineinfo() should set info offset
Set the value of the line info offset in gpio_desc_to_lineinfo(), rather
than relying on it being passed in the info.  This makes the function
behave as you would expect from the name - it generates the line info
corresponding to a given GPIO desc.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:56:23 +02:00
Bartosz Golaszewski 42e9acc679 gpio: mockup: refactor the module init function
Let's move the code preparing the device properties into a separate
routine. This has the advantage of simplifying the error handling and
makes the indentation less deep.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:52:21 +02:00
Bartosz Golaszewski 582be05ea4 gpio: mockup: use the generic 'gpio-line-names' property
GPIO line names are currently created by the driver from the chip label.
We'll want to support custom formats for line names (for instance: to
name all lines the same) for user-space tests so create them in the
module init function and pass them to the driver using the standard
'gpio-line-names' property.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:52:15 +02:00
Bartosz Golaszewski 148c2560c5 gpio: mockup: pass the chip label as device property
While we do check the "chip-name" property in probe(), we never actually
use it. Let's pass the chip label to the driver using device properties
as we'll want to allow users to define their own once dynamically
created chips are supported.

The property is renamed to "chip-label" to not cause any confusion with
the actual chip name which is of the form: "gpiochipX".

If the "chip-label" property is missing, let's do what most devices in
drivers/gpio/ do and use dev_name().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:52:11 +02:00
Bartosz Golaszewski 383bb2de4d gpio: mockup: increase the number of supported device properties
The driver actually supports 4 properties but we only ever set up up to
three. This will change however in upcoming patches so increase the
number of really (as in: the number the property array can hold)
supported properties to 4.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:51:43 +02:00
Bartosz Golaszewski 66f222ef45 gpio: mockup: remove unneeded return statement
There's a return; at the end of a void function. This is not needed so
remove it.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:51:26 +02:00
Bartosz Golaszewski 56f6cb35e2 gpio: mockup: use pr_fmt()
We don't need a custom logging helper. Let's use the standard pr_fmt()
macro which allows us to use all pr_*() routines with custom format.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:51:22 +02:00
Bartosz Golaszewski 25f0006603 gpio: mockup: use KBUILD_MODNAME
Drop the definition for the driver name. Let's use KBUILD_MODNAME for
the log format and use the "gpio-mockup" value directly in the only
place where it's relevant: in the name of the device.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:50:30 +02:00
Bartosz Golaszewski 94502ba9a4 gpio: mockup: drop unneeded includes
This module doesn't need gpio/consumer.h - it's a provider. It also
doesn't use any symbols from init.h so let's remove both includes.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:50:30 +02:00
Michael Walle 3795d7cc4f gpio: mpc8xxx: simplify ls1028a/ls1088a support
Some Layerscape/QoriQ SoCs have input buffers which needs to be enabled
first. This was done in two different ways in the driver. Unify it.

This was tested on a LS1028A SoC.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-30 10:50:30 +02:00
Bartosz Golaszewski e0ab949f15 gpio: mockup: fix resource leak in error path
If the module init function fails after creating the debugs directory,
it's never removed. Add proper cleanup calls to avoid this resource
leak.

Fixes: 9202ba2397 ("gpio: mockup: implement event injecting over debugfs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-30 10:50:25 +02:00
Anson Huang 12d16b397c gpio: mxc: Support module build
Change config to tristate, add module device table, module author,
description and license to support module build for i.MX GPIO driver.

As this is a SoC GPIO module, it provides common functions for most
of the peripheral devices, such as GPIO pins control, secondary
interrupt controller for GPIO pins IRQ etc., without GPIO driver, most
of the peripheral devices will NOT work properly, so GPIO module is
similar with clock, pinctrl driver that should be loaded ONCE and
never unloaded.

Since MXC GPIO driver needs to have init function to register syscore
ops once, here still use subsys_initcall(), NOT module_platform_driver().

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1600320829-1453-1-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-09-29 15:04:31 +02:00
Ed Wildgoose d25e8fdebd gpio: amd-fch: correct logic of GPIO_LINE_DIRECTION
The original commit appears to have the logic reversed in
amd_fch_gpio_get_direction. Also confirmed by observing the value of
"direction" in the sys tree.

Signed-off-by: Ed Wildgoose <lists@wildgooses.com>
Fixes: e09d168f13 ("gpio: AMD G-Series PCH gpio driver")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-28 12:22:04 +02:00
Tao Ren 3e640b1eec gpio: aspeed: fix ast2600 bank properties
GPIO_U is mapped to the least significant byte of input/output mask, and
the byte in "output" mask should be 0 because GPIO_U is input only. All
the other bits need to be 1 because GPIO_V/W/X support both input and
output modes.

Similarly, GPIO_Y/Z are mapped to the 2 least significant bytes, and the
according bits need to be 1 because GPIO_Y/Z support both input and
output modes.

Fixes: ab4a85534c ("gpio: aspeed: Add in ast2600 details to Aspeed driver")
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:37:18 +02:00
Jeremy Kerr bf0d394e88 gpio/aspeed-sgpio: don't enable all interrupts by default
Currently, the IRQ setup for the SGPIO driver enables all interrupts in
dual-edge trigger mode. Since the default handler is handle_bad_irq, any
state change on input GPIOs will trigger bad IRQ warnings.

This change applies sensible IRQ defaults: single-edge trigger, and all
IRQs disabled.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:10:56 +02:00
Jeremy Kerr ac67b07e26 gpio/aspeed-sgpio: enable access to all 80 input & output sgpios
Currently, the aspeed-sgpio driver exposes up to 80 GPIO lines,
corresponding to the 80 status bits available in hardware. Each of these
lines can be configured as either an input or an output.

However, each of these GPIOs is actually an input *and* an output; we
actually have 80 inputs plus 80 outputs.

This change expands the maximum number of GPIOs to 160; the lower half
of this range are the input-only GPIOs, the upper half are the outputs.
We fix the GPIO directions to correspond to this mapping.

This also fixes a bug when setting GPIOs - we were reading from the
input register, making it impossible to set more than one output GPIO.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae7 ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:10:40 +02:00
Ye Li e43c26e12d gpio: pca953x: Fix uninitialized pending variable
When pca953x_irq_pending returns false, the pending parameter won't
be set. But pca953x_irq_handler continues using this uninitialized
variable as pending irqs and will cause problem.
Fix the issue by initializing pending to 0.

Fixes: 064c73afe7 ("gpio: pca953x: Synchronize interrupt handler properly")
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-24 15:06:44 +02:00
Linus Walleij 36eccdb58f gpio updates for v5.10 - part 1
- automatically drive GPHY leds in gpio-stp-xway
 - refactor ->{get, set}_multiple() in gpio-aggregator
 - add support for a new model in rcar-gpio DT bindings
 - simplify several GPIO drivers with dev_err_probe()
 - disable Direct KBD interrupts in gpio-tc35894
 - use DEFINE_SEQ_ATTRIBUTE() in GPIO chardev to shrink code
 - switch to using a simpler IDA API in gpiolib
 - make devprop_gpiochip_set_names() more generic by using device properties
   instead of using fwnode helpers
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Merge tag 'gpio-updates-for-v5.10-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.10 - part 1

- automatically drive GPHY leds in gpio-stp-xway
- refactor ->{get, set}_multiple() in gpio-aggregator
- add support for a new model in rcar-gpio DT bindings
- simplify several GPIO drivers with dev_err_probe()
- disable Direct KBD interrupts in gpio-tc35894
- use DEFINE_SEQ_ATTRIBUTE() in GPIO chardev to shrink code
- switch to using a simpler IDA API in gpiolib
- make devprop_gpiochip_set_names() more generic by using device properties
  instead of using fwnode helpers
2020-09-21 23:39:50 +02:00
Michael Walle b7536d8749 gpio: Add support for the sl28cpld GPIO controller
Add support for the GPIO controller of the sl28 board management
controller. This driver is part of a multi-function device.

A controller has 8 lines. There are three different flavors:
full-featured GPIO with interrupt support, input-only and output-only.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-09-17 16:00:20 +01:00
Bartosz Golaszewski 587823d39f gpiolib: check for parent device in devprop_gpiochip_set_names()
It's possible for a GPIO chip to not have a parent device (whose
properties we inspect for 'gpio-line-names'). In this case we should
simply return from devprop_gpiochip_set_names(). Add an appropriate
check for this use-case.

Fixes: 7cba1a4d5e ("gpiolib: generalize devprop_gpiochip_set_names() for device properties")
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-09-17 12:07:02 +02:00
Andy Shevchenko 5ad284ab3a gpiolib: Fix line event handling in syscall compatible mode
The introduced line event handling ABI in the commit

  61f922db72 ("gpio: userspace ABI for reading GPIO line events")

missed the fact that 64-bit kernel may serve for 32-bit applications.
In such case the very first check in the lineevent_read() will fail
due to alignment differences.

To workaround this introduce lineevent_get_size() helper which returns actual
size of the structure in user space.

Fixes: 61f922db72 ("gpio: userspace ABI for reading GPIO line events")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-17 12:03:37 +02:00
Bartosz Golaszewski 32fc5aa2df gpiolib: unexport devprop_gpiochip_set_names()
Now that devprop_gpiochip_set_names() is only used in a single place
inside drivers/gpio/gpiolib.c, there's no need anymore for it to be
exported or to even live in its own source file. Pull this function into
the core source file for gpiolib.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-14 10:54:42 +02:00
Bartosz Golaszewski 7cba1a4d5e gpiolib: generalize devprop_gpiochip_set_names() for device properties
devprop_gpiochip_set_names() is overly complicated with taking the
fwnode argument (which requires using dev_fwnode() & of_fwnode_handle()
in ACPI and OF GPIO code respectively). Let's just switch to using the
generic device properties.

This allows us to pull the code setting line names directly into
gpiochip_add_data_with_key() instead of handling it separately for
ACPI and OF.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2020-09-14 10:54:01 +02:00
Bartosz Golaszewski 8d4a85b6ab gpiolib: switch to simpler IDA interface
We don't need to specify any ranges when allocating IDs so we can switch
to ida_alloc() and ida_free() instead of the ida_simple_ counterparts.

ida_simple_get(ida, 0, 0, gfp) is equivalent to
ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to
ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID
larger than INT_MAX.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-14 10:52:41 +02:00
Andy Shevchenko 425c5b3e17 gpiolib: convert to use DEFINE_SEQ_ATTRIBUTE macro
Use DEFINE_SEQ_ATTRIBUTE macro to simplify the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-11 17:33:51 +02:00
Bartosz Golaszewski 1b02d9e770 gpio: mockup: fix resource leak in error path
If the module init function fails after creating the debugs directory,
it's never removed. Add proper cleanup calls to avoid this resource
leak.

Fixes: 9202ba2397 ("gpio: mockup: implement event injecting over debugfs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-09-09 13:07:11 +02:00
Ahmad Fatoum 45ccf65567 gpio: siox: explicitly support only threaded irqs
The gpio-siox driver uses handle_nested_irq() to implement its
interrupt support. This is only capable of handling threaded irq
actions. For a hardirq action it triggers a NULL pointer oops.
(It calls action->thread_fn which is NULL then.)

Prevent registration of a hardirq action by setting
gpio_irq_chip::threaded to true.

Cc: u.kleine-koenig@pengutronix.de
Fixes: be8c8facc7 ("gpio: new driver to work with a 8x12 siox")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-09 12:59:15 +02:00
dillon min d284c16f84 gpio: tc35894: Disable Direct KBD interrupts to enable gpio irq
On tc35894, have to disable direct keypad interrupts to make
it as general purpose interrupts functionality work.
if not, after chip reset, IRQST(0x91) will always 0x20,
IRQN always low level, can't be clear.

Configure DIRECTx to enable general purpose gpio mode,
else read GPIOMISx register always zero in irq routine.

verified on tc35894, need more test on other tc3589x.

Signed-off-by: dillon min <dillon.minfei@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-09 11:33:07 +02:00
dillon min 214b0e1ad0 gpio: tc35894: fix up tc35894 interrupt configuration
The offset of regmap is incorrect, j * 8 is move to the
wrong register.

for example:

asume i = 0, j = 1. we want to set KPY5 as interrupt
falling edge mode, regmap[0][1] should be TC3589x_GPIOIBE1 0xcd
but, regmap[i] + j * 8 = TC3589x_GPIOIBE0 + 8 ,point to 0xd4,
this is TC3589x_GPIOIE2 not TC3589x_GPIOIBE1.

Fixes: d88b25be35 ("gpio: Add TC35892 GPIO driver")
Cc: Cc: stable@vger.kernel.org
Signed-off-by: dillon min <dillon.minfei@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-09-09 11:31:09 +02:00
Taiping Lai 5fcface659 gpio: sprd: Clear interrupt when setting the type as edge
The raw interrupt status of GPIO maybe set before the interrupt is enabled,
which would trigger the interrupt event once enabled it from user side.
This is the case for edge interrupts only. Adding a clear operation when
setting interrupt type can avoid that.

There're a few considerations for the solution:
1) This issue is for edge interrupt only; The interrupts requested by users
   are IRQ_TYPE_LEVEL_HIGH as default, so clearing interrupt when request
   is useless.
2) The interrupt type can be set to edge when request and following up
   with clearing it though, but the problem is still there once users set
   the interrupt type to level trggier.
3) We can add a clear operation after each time of setting interrupt
   enable bit, but it is redundant for level trigger interrupt.

Therefore, the solution is this patch seems the best for now.

Fixes: 9a3821c2bb ("gpio: Add GPIO driver for Spreadtrum SC9860 platform")
Signed-off-by: Taiping Lai <taiping.lai@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-31 18:06:28 +02:00
Krzysztof Kozlowski 805a6ef8ac gpio: zynq: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:16:06 +02:00
Krzysztof Kozlowski 308a028d07 gpio: pisosr: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:15:51 +02:00
Krzysztof Kozlowski ca6a77eb34 gpio: pca953x: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:15:34 +02:00
Krzysztof Kozlowski 4e7ed69685 gpio: omap: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:15:23 +02:00
Krzysztof Kozlowski 33b78b5f14 gpio: davinci: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:15:06 +02:00
Krzysztof Kozlowski cff9d73f3d gpio: bcm-kona: Simplify with dev_err_probe()
Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-28 20:13:51 +02:00
Serge Semin feeaefd378 gpio: dwapb: Use resource managed GPIO-chip add data method
Since the resource managed version of gpiochip_add_data() will handle the
GPIO-chip data automated cleanup we can freely remove the DW APB GPIO
driver code responsible for that. After doing so the DW APB GPIO driver
removal callback can be also fully discarded since there is nothing left
to be done for it. All the cleanups are now performed by means of the
device managed framework.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-11-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:58 +02:00
Serge Semin daa3f58d18 gpio: dwapb: Get clocks by means of resource managed interface
The kernel clock framework provides the resource managed version of
the clk_bulk_get() method. The only thing which needs to be also automated
is the clocks disable/unprepare procedure executed on the device removal.
It can be implemented by means of the custom action definition. After that
the clocks acquisition and release will be purely managed by the device
resources interface.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-10-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:58 +02:00
Serge Semin 4731d80f5e gpio: dwapb: Get reset control by means of resource managed interface
The reset control interface provides the resource managed version of
the reset_control_get() method. The only thing which needs to be also
automated is the reset lane assertion on the device removal. It can be
implemented by means of the custom action definition. After that the reset
control will be purely managed by the device resources interface.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-9-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:58 +02:00
Serge Semin 69a6f5d9b6 gpio: dwapb: Discard ACPI GPIO-chip IRQs request
Since GPIOlib-based IRQ-chip interface is now utilized there is no need
in calling the methods acpi_gpiochip_{request,free}_interrupts() here.
They will be called from gpiochip_add_irqchip()/gpiochip_irqchip_remove()
anyway.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-8-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:58 +02:00
Serge Semin ca4cf5ea04 gpio: dwapb: Discard GPIO-to-IRQ mapping function
Since GPIOlib-based IRQ-chip interface is now utilized there is no need in
setting up a custom GPIO-to-IRQ mapping method. GPIO-lib defines the
standard mapping method - gpiochip_to_irq(), which will be used anyway no
matter whether the custom to_irq callback is specified or not.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-7-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:57 +02:00
Serge Semin 0ea683931a gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip
GPIO-lib provides a ready-to-use interface to initialize an IRQ-chip on
top of a GPIO chip. It's better from maintainability and readability
point of view to use one instead of supporting a hand-written Generic
IRQ-chip-based implementation. Moreover the new implementation won't
cause much functional overhead but will provide a cleaner driver code.
All of that makes the DW APB GPIO driver conversion pretty much justified
especially seeing a tendency of the other GPIO drivers getting converted
too.

Here is what we do in the framework of this commit to convert the driver
to using the GPIO-lib-based IRQ-chip interface:

1) IRQ ack, mask and unmask callbacks are locally defined instead of
using the Generic IRQ-chip ones.

2) An irq_chip structure instance is embedded into the dwapb_gpio
private data. Note we can't have a static instance of that structure since
GPIO-lib will add some hooks into it by calling gpiochip_set_irq_hooks().
A warning about that would have been printed by the GPIO-lib code if we
used a single irq_chip structure instance for multiple DW APB GPIO
controllers.

3) Initialize the gpio_irq_chip structure embedded into the gpio_chip
descriptor. By default there is no IRQ enabled so any event raised will be
handled by the handle_bad_irq() IRQ flow handler. If DW APB GPIO IP-core
is synthesized to have non-shared reference IRQ-lines, then as before the
hierarchical and cascaded cases are distinguished by checking how many
parental IRQs are defined. (Note irq_set_chained_handler_and_data() won't
initialize IRQs, which descriptors couldn't be found.) If DW APB GPIO IP
is used on a platform with shared IRQ line, then we simply won't let the
GPIO-lib to initialize the parental IRQs, but will handle them locally in
the driver.

4) Discard linear IRQ-domain and Generic IRQ-chip initialization, since
GPIO-lib IRQ-chip interface will create a new domain and accept a standard
IRQ-chip structure pointer based on the setting we provided in the
gpio_irq_chip structure.

5) Manually select a proper IRQ flow handler directly in the
irq_set_type() callback by calling irq_set_handler_locked() method, since
an ordinary (not Generic) irq_chip descriptor is now utilized. Note this
shalln't give any regression

6) Alter CONFIG_GPIO_DWAPB kernel config to select
CONFIG_GPIOLIB_IRQCHIP instead of CONFIG_GENERIC_IRQ_CHIP.

Note neither 4) nor 5) shall cause a regression of commit 6a2f4b7dad
("gpio: dwapb: use a second irq chip"), since the later isn't properly
used here anyway.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-6-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:57 +02:00
Serge Semin f9f890ba2b gpio: dwapb: Add max GPIOs macro
Add a new macro DWAPB_MAX_GPIOS which defines the maximum possible number
of GPIO lines corresponding to the maximum DW APB GPIO controller port
width. Use the new macro instead of number literal 32 where it's
applicable.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-5-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:57 +02:00
Serge Semin 75c1236a4d gpio: dwapb: Move MFD-specific IRQ handler
For better readability let's group all the IRQ handlers in a single place
of the driver instead of having them scatter around all over the file.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-4-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:57 +02:00
Serge Semin 7569486d79 gpio: dwapb: Add ngpios DT-property support
Indeed generic GPIO DT-schema implies that number of GPIOs should be
described by the "ngpios" property located under a GPIO-provider DT node.
In that case it's redundant to have a vendor-specific "snps,nr-gpios"
property describing the same setting. Moreover it might be errors prone.

Since commit 93d2e4322a ("of: platform: Batch fwnode parsing when adding
all top level devices") the fwnode parsing is resumed after the vast
majority of the platform devices are added. Implicitly that commit
activates re-parsing of the whole device tree GPIOs-phandle properties
detected having "-gpio/-gpios" suffixes. Since the vendor-specific number
of GPIOs property is defined with "-gpios" suffix, then of_link_property()
will consider it as a suffix-property with "#gpio-cells" structure, which
obviously it doesn't have. As a result for two DW APB GPIO controllers
we'll have the next errors printed.

OF: /bus@1f059000/gpio@1f044000/gpio-port@0: could not find phandle
OF: /bus@1f059000/gpio@1f045000/gpio-port@0: could not get #gpio-cells for /opp-table
OF: /bus@1f059000/gpio@1f044000/gpio-port@0: could not find phandle
OF: /bus@1f059000/gpio@1f045000/gpio-port@0: could not get #gpio-cells for /opp-table

See, the kernel fwnode parsing procedure even tried to resolve the phandle
ID, which it thought was the opp-table DT-node, while in fact it was just
a number "32". What would happen if that magic number actually referred to
a GPIO DT-node with "#gpio-cells" property defined?..

In order to fix the problem let's mark the "snps,nr-gpios" property as
deprecated and add the generic "ngpios" property support with the same
purpose as the deprecated one. That and the errors log above shall
motivate the platform developer to convert the DW APB GPIO DT-nodes to
using the standard number of GPIOs property.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200730152808.2955-3-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-27 10:32:57 +02:00
Gustavo A. R. Silva df561f6688 treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-23 17:36:59 -05:00
Tony Lindgren d3f99f9183 gpio: omap: Fix warnings if PM is disabled
Fix warnings for omap_gpio_resume and omap_gpio_suspend
defined but not used when PM is disabled as noticed when
doing make randconfig builds.

Fixes: f02a03985d ("gpio: omap: Add missing PM ops for suspend")
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-19 18:16:16 +02:00
Andy Shevchenko 01e8d85b68 gpio: aggregator: Refactor ->{get, set}_multiple() to make Sparse happy
Sparse can't see locking scheme used in ->get_multiple() and
->set_multiple() callbacks.
  CHECK   .../drivers/gpio/gpio-aggregator.c
  .../spinlock.h:409:9: warning: context imbalance in 'gpio_fwd_get_multiple' - unexpected unlock
  .../spinlock.h:409:9: warning: context imbalance in 'gpio_fwd_set_multiple' - unexpected unlock

Refactor them to have better readability and make Sparse happy.

Code size impact is +52 bytes with arm-linux-gnueabihf-gcc 7.5.0.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-18 21:39:39 +02:00
Aleksander Jan Bajkowski 329afb94e0 gpio: stp-xway: automatically drive GPHY leds on ar10 and grx390
Ar10 (xr300) has 3 and grx390 (xrx330) has 4 built-in GPHY. PHY LEDs are
connected via STP. STP is a peripheral controller used to drive external
shift register cascades. The hardware is able to allow the GPHY to drive
some GPIO of the cascade automatically.This patch allows for this on ar10
and grx390.

Tested on D-Link DWR-966 with OpenWRT.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-08-18 21:32:28 +02:00
Linus Torvalds 1d8ce0e093 This is the bulk of GPIO changes for the v5.9 kernel cycle:
Core changes:
 
 - Introduce the for_each_requested_gpio() macro to help in
   dependent code all over the place. Also patch a few locations
   to use it while we are at it.
 
 - Split out the sysfs code into its own file.
 
 - Split out the character device code into its own file, then
   make a set of refactorings and improvements to this code.
   We are setting the stage to revamp the userspace API a bit
   in the next cycle.
 
 - Fix a whole slew of kerneldoc that was wrong or missing.
 
 New drivers:
 
 - The PCA953x driver now supports the PCAL9535.
 
 Driver improvements:
 
 - A host of incremental modernizations and improvements to the
   PCA953x driver.
 
 - Incremental improvements to the Xilinx Zynq driver.
 
 - Some improvements to the GPIO aggregator driver.
 
 - I ran all over the place switching all threaded and other
   drivers requesting their own IRQ while using the core
   GPIO IRQ helpers to pass the GPIO irq chip as a template
   instead of calling the explicit set-up functions. Next merge
   window we may retire the old code altogether.
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Merge tag 'gpio-v5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v5.9 kernel cycle.

  There is nothing too exciting in it, but a new macro that fixes a
  build failure on a minor ARM32 platform that appeared yesterday is
  part of it so we better merge it.

  Core changes:

   - Introduce the for_each_requested_gpio() macro to help in dependent
     code all over the place. Also patch a few locations to use it while
     we are at it.

   - Split out the sysfs code into its own file.

   - Split out the character device code into its own file, then make a
     set of refactorings and improvements to this code. We are setting
     the stage to revamp the userspace API a bit in the next cycle.

   - Fix a whole slew of kerneldoc that was wrong or missing.

  New drivers:

   - The PCA953x driver now supports the PCAL9535.

  Driver improvements:

   - A host of incremental modernizations and improvements to the
     PCA953x driver.

   - Incremental improvements to the Xilinx Zynq driver.

   - Some improvements to the GPIO aggregator driver.

   - I ran all over the place switching all threaded and other drivers
     requesting their own IRQ while using the core GPIO IRQ helpers to
     pass the GPIO irq chip as a template instead of calling the
     explicit set-up functions. Next merge window we may retire the old
     code altogether"

* tag 'gpio-v5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (97 commits)
  gpio: wcove: Request IRQ after all initialisation done
  gpio: crystalcove: Free IRQ on error path
  gpio: pca953x: Request IRQ after all initialisation done
  gpio: don't use same lockdep class for all devm_gpiochip_add_data users
  gpio: max732x: Use irqchip template
  gpio: stmpe: Move chip registration
  gpio: rcar: Use irqchip template
  gpio: regmap: fix type clash
  gpio: Correct kernel-doc inconsistency
  gpio: pci-idio-16: Use irqchip template
  gpio: pcie-idio-24: Use irqchip template
  gpio: 104-idio-16: Use irqchip template
  gpio: 104-idi-48: Use irqchip template
  gpio: 104-dio-48e: Use irqchip template
  gpio: ws16c48: Use irqchip template
  gpio: omap: improve coding style for pin config flags
  gpio: dln2: Use irqchip template
  gpio: sch: Add a blank line between declaration and code
  gpio: sch: changed every 'unsigned' to 'unsigned int'
  gpio: ich: changed every 'unsigned' to 'unsigned int'
  ...
2020-08-05 12:56:27 -07:00
Andy Shevchenko 22cc422070 gpio: wcove: Request IRQ after all initialisation done
There is logically better to request IRQ when we initialise all structures.
Align the driver with the rest on the same matter.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200728125504.27786-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-04 01:25:02 +02:00
Andy Shevchenko a1cdaa64aa gpio: crystalcove: Free IRQ on error path
It appears that all, but request_irq(), calls in the driver are device managed.
In unlikely case of devm_gpiochip_add_data() failure the IRQ left requested.
Free IRQ on error path by switching to devm_request_threaded_irq() API.

Byproduct of this change is a drop of ->remove() callback completely.

Fixes: 945e72db36 ("gpio: crystalcove: Use irqchip template")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200728125504.27786-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-04 01:25:02 +02:00
Andy Shevchenko 2a93a0da06 gpio: pca953x: Request IRQ after all initialisation done
There is logically better to request IRQ when we initialise all structures.
Align the driver with the rest on the same matter.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200728125504.27786-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-04 01:25:02 +02:00
Ahmad Fatoum 5f402bb175 gpio: don't use same lockdep class for all devm_gpiochip_add_data users
Commit 959bc7b22b ("gpio: Automatically add lockdep keys") documents
in its commits message its intention to "create a unique class key for
each driver".

It does so by having gpiochip_add_data add in-place the definition of
two static lockdep classes for LOCKDEP use. That way, every caller of
the macro adds their gpiochip with unique lockdep classes.

There are many indirect callers of gpiochip_add_data, however, via
use of devm_gpiochip_add_data. devm_gpiochip_add_data has external
linkage and all its users will share the same lockdep classes, which
probably is not intended.

Fix this by replicating the gpio_chip_add_data statics-in-macro for
the devm_ version as well.

Fixes: 959bc7b22b ("gpio: Automatically add lockdep keys")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/r/20200731123835.8003-1-a.fatoum@pengutronix.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-08-04 01:22:02 +02:00
Linus Walleij bb58a47a12 gpio: max732x: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20200726221259.133536-1-linus.walleij@linaro.org
2020-08-04 01:12:43 +02:00
Linus Walleij beb3fb4165 gpio: stmpe: Move chip registration
Make sure to register the GPIO chip after requesting the
interrupt and setting up the IRQ members of the irqchip.

Fixes: 9745079609 ("gpio: stmpe: Use irqchip template")
Reported-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Patrice Chotard <patrice.chotard@st.com>
Link: https://lore.kernel.org/r/20200728072706.348725-1-linus.walleij@linaro.org
2020-08-04 01:07:23 +02:00
Linus Walleij b470cef1ff gpio: rcar: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Biju Das <biju.das@bp.renesas.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200722113141.243163-1-linus.walleij@linaro.org
2020-07-30 00:13:10 +02:00
Mark Brown 11ba28229f
Merge remote-tracking branch 'spi/for-5.9' into spi-next 2020-07-29 14:52:00 +01:00
Linus Walleij 4530a840e7 gpio: pci-idio-16: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.
Also move the IRQ initialization to the special .init_hw()
callback.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722110649.202223-1-linus.walleij@linaro.org
2020-07-23 15:11:26 +02:00
Linus Walleij 866e863edb gpio: pcie-idio-24: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722110027.192782-1-linus.walleij@linaro.org
2020-07-23 15:10:55 +02:00
Linus Walleij 82e4613d3d gpio: 104-idio-16: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.
Also move the IRQ initialization to the special .init_hw()
callback.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722105517.186137-1-linus.walleij@linaro.org
2020-07-23 15:10:25 +02:00
Linus Walleij 44b01cf5d2 gpio: 104-idi-48: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.
Also move the IRQ initialization to the special .init_hw()
callback.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722104820.174654-1-linus.walleij@linaro.org
2020-07-23 15:09:54 +02:00
Linus Walleij 2fa1d392cd gpio: 104-dio-48e: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.
Also move the IRQ initialization to the special .init_hw()
callback.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722103915.162156-1-linus.walleij@linaro.org
2020-07-23 15:09:26 +02:00
Linus Walleij fceb7ab385 gpio: ws16c48: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit call to gpiochip_irqchip_add().

The irqchip is instead added while adding the gpiochip.
Also move the IRQ initialization to the special .init_hw()
callback.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20200722101938.151265-1-linus.walleij@linaro.org
2020-07-23 15:08:55 +02:00
Drew Fustini bde8c0e64c gpio: omap: improve coding style for pin config flags
Change the handling of pin config flags from if/else to switch
statement to make the code more readable and cleaner.

Suggested-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200722120755.230741-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-23 15:05:23 +02:00
Linus Walleij ecb55df8f3 gpio: dln2: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add(). The irqchip is
instead added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Cc: Daniel Baluta <daniel.baluta@gmail.com>
Cc: Octavian Purdila <octavian.purdila@nxp.com>
Link: https://lore.kernel.org/r/20200722073426.38890-1-linus.walleij@linaro.org
2020-07-23 15:03:25 +02:00
Linus Walleij ce8672c20b intel-gpio for v5.9-1
* Move GPIO PMIC drivers to use IRQ chip template
 * Introduce for_each_requested_gpio() and convert existing users
 * Replace unsigned by unsigned int in few drivers
 * Fix an issue in kernel doc that validator complains about
 * Move to verbose debug level the IRQ status message in gpio-pch
 
 The following is an automated git shortlog grouped by driver:
 
 ARM/orion/gpio:
  -  Make use of for_each_requested_gpio()
 
 crystalcove:
  -  Use irqchip template
  -  changed every 'unsigned' to 'unsigned int'
 
 gpiolib:
  -  Introduce for_each_requested_gpio_in_range() macro
 
 gpio-ml-ioh:
  -  Fix missing ':' in 'struct ioh_gpio_reg_data
 
 ich:
  -  changed every 'unsigned' to 'unsigned int'
 
 mvebu:
  -  Make use of for_each_requested_gpio()
 
 pch:
  -  Add a blank line between declaration and code
  -  changed every 'unsigned' to 'unsigned int'
  -  Move IRQ status message to verbose debug level
 
 pinctrl:
  -  at91: Make use of for_each_requested_gpio()
 
 sch:
  -  Add a blank line between declaration and code
  -  changed every 'unsigned' to 'unsigned int'
 
 wcove:
  -  Use irqchip template
 
 xra1403:
  -  Make use of for_each_requested_gpio()
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Merge tag 'intel-gpio-v5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel into devel

intel-gpio for v5.9-1

* Move GPIO PMIC drivers to use IRQ chip template
* Introduce for_each_requested_gpio() and convert existing users
* Replace unsigned by unsigned int in few drivers
* Fix an issue in kernel doc that validator complains about
* Move to verbose debug level the IRQ status message in gpio-pch

The following is an automated git shortlog grouped by driver:

ARM/orion/gpio:
 -  Make use of for_each_requested_gpio()

crystalcove:
 -  Use irqchip template
 -  changed every 'unsigned' to 'unsigned int'

gpiolib:
 -  Introduce for_each_requested_gpio_in_range() macro

gpio-ml-ioh:
 -  Fix missing ':' in 'struct ioh_gpio_reg_data

ich:
 -  changed every 'unsigned' to 'unsigned int'

mvebu:
 -  Make use of for_each_requested_gpio()

pch:
 -  Add a blank line between declaration and code
 -  changed every 'unsigned' to 'unsigned int'
 -  Move IRQ status message to verbose debug level

pinctrl:
 -  at91: Make use of for_each_requested_gpio()

sch:
 -  Add a blank line between declaration and code
 -  changed every 'unsigned' to 'unsigned int'

wcove:
 -  Use irqchip template

xra1403:
 -  Make use of for_each_requested_gpio()
2020-07-22 16:01:00 +02:00
Abanoub Sameh 4941b8dedb gpio: sch: Add a blank line between declaration and code
Added a lined between a declaration and other statements according to the
kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-22 16:00:27 +03:00
Abanoub Sameh 2c58e44a42 gpio: sch: changed every 'unsigned' to 'unsigned int'
Changed 'unsigned' to 'unsigned int'.
This makes the code more uniform, and compliant with the kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-22 16:00:27 +03:00
Abanoub Sameh ae84f15c65 gpio: ich: changed every 'unsigned' to 'unsigned int'
Changed 'unsigned' to 'unsigned int'.
This makes the code more uniform, and compliant with the kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-22 16:00:27 +03:00
Linus Walleij 22f61d4e6f gpio: wcove: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Cc: Bin Gao <bin.gao@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-22 16:00:27 +03:00
Linus Walleij 945e72db36 gpio: crystalcove: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-22 16:00:27 +03:00
Linus Walleij 4726773292
spi: ppc4xx: Convert to use GPIO descriptors
This converts the PPC4xx SPI driver to use GPIO descriptors.

The driver is already just picking some GPIOs from the device
tree so the conversion is pretty straight forward. However
this driver is looking form a pure "gpios" property rather
than the standard binding "cs-gpios" so we need to add a new
exception to the gpiolib OF parser to allow this for this
driver's compatibles.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20200714072226.26071-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-22 01:55:52 +01:00
Abanoub Sameh 3abbdbe3dc gpio: crystalcove: changed every 'unsigned' to 'unsigned int'
Changed 'unsigned' to 'unsigned int'.
This makes the code more uniform, and compliant with the kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-21 19:12:57 +03:00
Abanoub Sameh 37ceab74f1 gpio: pch: Add a blank line between declaration and code
Added a lined between a declaration and other statements according to the
kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-21 19:12:57 +03:00
Abanoub Sameh 0c106a23d6 gpio: pch: changed every 'unsigned' to 'unsigned int'
Changed 'unsigned' to 'unsigned int'.
This makes the code more uniform, and compliant with the kernel coding style.

Signed-off-by: Abanoub Sameh <abanoubsameh@protonmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-21 19:12:57 +03:00
Linus Walleij edee3bc658 gpio: pca953x: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Adam Ford <aford173@gmail.com>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200717144040.63253-1-linus.walleij@linaro.org
2020-07-20 16:05:57 +02:00
Drew Fustini 75dec56710 gpio: omap: handle pin config bias flags
Modify omap_gpio_set_config() to handle pin config bias flags by calling
gpiochip_generic_config().

The pin group for the gpio line must have the corresponding pinconf
properties:

PIN_CONFIG_BIAS_PULL_UP requires "pinctrl-single,bias-pullup"
PIN_CONFIG_BIAS_PULL_DOWN requires "pinctrl-single,bias-pulldown"

This is necessary for pcs_pinconf_set() to find the requested bias
parameter in the PIN_MAP_TYPE_CONFIGS_GROUP pinctrl map.

Signed-off-by: Drew Fustini <drew@beagleboard.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20200715213738.1640030-1-drew@beagleboard.org
Link: https://lore.kernel.org/r/20200717194043.1774643-1-drew@beagleboard.org
2020-07-20 16:04:41 +02:00
Linus Walleij 50787be3ad gpio: pcf857x: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Anders Darander <anders@chargestorm.se>
Cc: Roger Quadros <rogerq@ti.com>
Link: https://lore.kernel.org/r/20200717144835.68150-1-linus.walleij@linaro.org
2020-07-20 15:56:40 +02:00
Linus Walleij dfc3a26deb gpio: adp5588: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Cc: Nikolaus Voss <nv@vosn.de>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Link: https://lore.kernel.org/r/20200716150502.195821-1-linus.walleij@linaro.org
2020-07-20 15:47:50 +02:00
Linus Walleij 565a0e9ab8 gpio: adnp: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Roland Stigge <stigge@antcom.de>
Cc: Lars Poeschel <poeschel@lemonage.de>
Link: https://lore.kernel.org/r/20200716120318.127176-1-linus.walleij@linaro.org
2020-07-20 15:34:59 +02:00
Linus Walleij 9745079609 gpio: stmpe: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Link: https://lore.kernel.org/r/20200716100638.112451-1-linus.walleij@linaro.org
2020-07-20 15:34:17 +02:00
Linus Walleij 0fcfd9aa61 gpio: tc35892: Use irqchip template
This makes the driver use the irqchip template to assign
properties to the gpio_irq_chip instead of using the
explicit calls to gpiochip_irqchip_add_nested() and
gpiochip_set_nested_irqchip(). The irqchip is instead
added while adding the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200716093459.76378-1-linus.walleij@linaro.org
2020-07-20 15:33:34 +02:00
Linus Walleij 80606cb241 gpio: max77620: Use helper variable and clarify
Most other drivers fill out the gpio_irq_chip using a
struct gpio_irq_chip *girq helper variable for ease of
reading.

We also make a habit of explicitly assigning NULL and
zero to the parent IRQs when using ordinary IRQ handlers
in the driver, mostly for code readability and
maintenance.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Cc: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200716092835.69176-1-linus.walleij@linaro.org
2020-07-17 14:03:38 +02:00
Andy Shevchenko 761b5c30c2 gpio: mmio: replace open-coded for_each_set_bit()
Use for_each_set_bit() instead of open-coding it to simplify the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200713154429.23662-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 15:07:18 +02:00
Sungbo Eo 16d44b6085 gpio: pca9570: add GPO driver for PCA9570
NXP PCA9570 is a 4-bit I2C GPO expander without interrupt functionality.
Its ports are controlled only by a data byte without register address.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Datasheet: https://www.nxp.com/docs/en/data-sheet/PCA9570.pdf
Link: https://lore.kernel.org/r/20200709134829.216393-1-mans0n@gorani.run
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 14:35:12 +02:00
Dmitry Osipenko e6827bc3fa gpio: max77620: Initialize hardware state of interrupts
I noticed on Nexus 7 that after rebooting from downstream kernel to
upstream, the GPIO interrupt is triggering non-stop despite interrupts
being disabled for all of GPIOs. This happens because Nexus 7 uses a
soft-reboot, meaning that bootloader should take care of resetting
hardware, but the bootloader doesn't do it well. As a result, GPIO
interrupt may be left ON at a boot time. Let's mask all GPIO interrupts
at the driver's initialization time in order to resolve the issue.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Link: https://lore.kernel.org/r/20200709171203.12950-7-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Dmitry Osipenko 15d9e7e847 gpio: max77620: Use irqchip template
This change addresses one of the GPIO-core TODOs for the MAX77620 driver
which requires modern drivers to use the irqchip template. Instead of
using the GPIO's irqchip-helpers for creating the IRQ domain, the
gpio_irq_chip structure is now filled by the driver itself and then
gpiochip_add_data() takes care of instantiating the IRQ domain for us.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Link: https://lore.kernel.org/r/20200709171203.12950-6-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Dmitry Osipenko c607e5e2e4 gpio: max77620: Don't shadow error code of platform_get_irq()
The platform_get_irq() returns a positive interrupt number on success and
negative error code on failure (zero shouldn't ever happen in practice, it
would produce a noisy warning). Hence let's return the error code directly
instead of overriding it with -ENODEV.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Link: https://lore.kernel.org/r/20200709171203.12950-5-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Dmitry Osipenko 78934d885e gpio: max77620: Don't set of_node
The gpiochip_add_data() takes care of setting the of_node to the parent's
device of_node, hence there is no need to do it manually in the driver's
code. This patch corrects the parent's device pointer and removes the
unnecessary setting of the of_node.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Link: https://lore.kernel.org/r/20200709171203.12950-4-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Dmitry Osipenko 2a5e6f7eed gpio: max77620: Fix missing release of interrupt
The requested interrupt is never released by the driver. Fix this by
using the resource-managed variant of request_threaded_irq().

Fixes: ab3dd9cc24 ("gpio: max77620: Fix interrupt handling")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: <stable@vger.kernel.org> # 5.5+
Link: https://lore.kernel.org/r/20200709171203.12950-3-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Dmitry Osipenko 4ee82256ee gpio: max77620: Replace 8 with MAX77620_GPIO_NR
The MAX77620_GPIO_NR enum value represents the total number of GPIOs,
let's use it instead of a raw value in order to improve the code's
readability a tad.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Link: https://lore.kernel.org/r/20200709171203.12950-2-digetx@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-16 10:50:40 +02:00
Kent Gibson 4682427241 gpiolib: cdev: refactor lineevent cleanup into lineevent_free
Consolidate the cleanup of lineevents, currently duplicated in
lineevent_create and lineevent_release, into a helper function
lineevent_free.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:01 +02:00
Kent Gibson 883f919818 gpiolib: cdev: refactor linehandle cleanup into linehandle_free
Consolidate the cleanup of linehandles, currently duplicated in
linehandle_create and linehandle_release, into a helper function
linehandle_free.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:01 +02:00
Kent Gibson 1bf7ba4001 gpiolib: cdev: remove recalculation of offset
Remove recalculation of offset from desc, where desc itself was calculated
from offset.

There is no benefit from the desc -> hwgpio conversion in this context.
The only implicit benefit of the offset -> desc -> hwgpio is
the range check in the offset -> desc, but where desc is required you
still get that, and where desc isn't required it is simpler to perform
the range check directly.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:01 +02:00
Kent Gibson f30ef3e837 gpiolib: cdev: fix minor race in GET_LINEINFO_WATCH
Merge separate usage of test_bit/set_bit into test_and_set_bit to remove
the possibility of a race between the test and set.

Similarly test_bit and clear_bit.

In the existing code it is possible for two threads to race past the
test_bit and then set or clear the watch bit, and neither return EBUSY.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:01 +02:00
Kent Gibson e2b781c5f0 gpiolib: cdev: rename priv to cdev
Rename priv to cdev to improve readability.

The name "priv" indicates that the object is pointed to by
file->private_data, not what the object is actually is.
As it is always used to point to a struct gpio_chardev_data, renaming
it to cdev is more appropriate.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson 6accc376a7 gpiolib: cdev: use blocking notifier call chain instead of atomic
Replace usage of atomic_notifier_call_chain with
blocking_notifier_call_chain as the notifier function,
lineinfo_changed_notify, calls gpio_desc_to_lineinfo,
which calls pinctrl_gpio_can_use_line, which can sleep.

The chain isn't being called from an atomic context so the
the blocking notifier is a suitable substitute.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson 0cdc85a371 gpiolib: cdev: remove pointless decrement of i
Remove pointless decrement of variable, and associated comment.

While i is used subsequently, it is re-initialized so this decrement
serves no purpose.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson 52b7b596dd gpiolib: cdev: rename numdescs to num_descs
Rename numdescs to num_descs to be more consistent with the naming of
other counters and improve readability.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson 49bc52798d gpiolib: cdev: rename 'filep' and 'filp' to 'file' to be consistent with other use
Rename 'filep' and 'filp' to 'file' to be consistent with other use
and improve readability.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson c274b58a4b gpiolib: cdev: refactor gpiohandle_flags_to_desc_flags
Refactor the mapping from handle flags to desc flags into a helper
function.

The assign_bit is overkill where it is replacing the set_bit cases, as is
rechecking bits known to be clear in some circumstances, but the DRY
simplification more than makes up for any performance degradation,
especially as this is not a hot path.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson a18512e3f1 gpiolib: cdev: minor indentation fixes
Make indentation consistent with other use to improve readability.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson d189f6270f gpiolib: cdev: sort includes
Sort the includes of gpiolib-cdev.c to make it easier to identify if a
module is included and to avoid duplication.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Kent Gibson ef087d8e95 gpiolib: move gpiolib-sysfs function declarations into their own header
Move gpiolib-sysfs function declarations into their own header.

These functions are in gpiolib-sysfs.c, and are only required by gpiolib.c,
and so should be in a module header, not gpiolib.h.

This brings gpiolib-sysfs into line with gpiolib-cdev, and is another step
towards removing the sysfs inferface.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-07-12 10:22:00 +02:00
Linus Walleij 4672a4a9fb Merge branch 'devel' into for-next 2020-07-09 17:06:28 +02:00
Linus Walleij a6175e894d Merge branch 'lee-fixes' into devel 2020-07-08 09:24:37 +02:00
Lee Jones a7a9ad232f gpio: gpio-mlxbf2.c: Provide __releases() annotation to stop confusing Sparse
Sparse cannot peer into other functions to see when and if locks are
acquired and released, thus it simply warns that a 'context imbalance'
is detected instead.  Let's be kind to Sparse and let it know that
this behaviour is intentional.

 drivers/gpio/gpio-mlxbf2.c:125:12: warning: context imbalance in 'mlxbf2_gpio_lock_acquire' - different lock contexts for basic block
 drivers/gpio/gpio-mlxbf2.c:151:13: warning: context imbalance in 'mlxbf2_gpio_lock_release' - unexpected unlock

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Asmaa Mnebhi <asmaa@mellanox.com>
Cc: Asmaa Mnebhi <Asmaa@mellanox.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-11-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:08 +02:00
Lee Jones 2f9bce5f38 gpio: gpio-mlxbf2: Tell the compiler that ACPI functions may not be use
... as is the case when !CONFIG_ACPI.

Fixes the following W=1 kernel build warning:

 drivers/gpio/gpio-mlxbf2.c:312:36: warning: ‘mlxbf2_gpio_acpi_match’ defined but not used [-Wunused-const-variable=]
 312 | static const struct acpi_device_id mlxbf2_gpio_acpi_match[] = {
 | ^~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Asmaa Mnebhi <asmaa@mellanox.com>
Cc: Asmaa Mnebhi <Asmaa@mellanox.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-10-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:08 +02:00
Lee Jones 6ac2de953b gpio: gpio-mlxbf: Tell the compiler that ACPI functions may not be used
... as is the case when !CONFIG_ACPI.

Fixes the following W=1 kernel build warning:

 drivers/gpio/gpio-mlxbf.c:130:36: warning: ‘mlxbf_gpio_acpi_match’ defined but not used [-Wunused-const-variable=]
 130 | static const struct acpi_device_id mlxbf_gpio_acpi_match[] = {
 | ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Shravan Kumar Ramani <sramani@mellanox.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-9-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:08 +02:00
Lee Jones 4e2912901e gpio: gpio-it87: Fix formatting issues which confuse kerneldoc
Kerneldoc expects struct properties to be documented using the syntax
'@.*: ', but no ':' has been provided in 'struct it87_gpio's
header.  Add them to stop confusing kerneldoc.

Fixes the following W=1 warnings:

 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'chip' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'lock' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'io_base' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'io_size' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'output_base' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'simple_base' not described in 'it87_gpio'
 drivers/gpio/gpio-it87.c:69: warning: Function parameter or member 'simple_size' not described in 'it87_gpio'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: "Diego Elio Pettenò" <flameeyes@flameeyes.eu>
Link: https://lore.kernel.org/r/20200630133345.2232932-8-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:08 +02:00
Lee Jones 5f3beb67b5 gpio: gpio-syscon: Fix formatting issues which confuse kerneldoc
Kerneldoc expects struct properties to be documented using the syntax
'@.*: ', but no '@' has been provided in 'struct syscon_gpio_data's
header.  Add them to stop confusing kerneldoc.

Fixes the following W=1 warnings:

 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'compatible' not described in 'syscon_gpio_data'
 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'flags' not described in 'syscon_gpio_data'
 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'bit_count' not described in 'syscon_gpio_data'
 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'dat_bit_offset' not described in 'syscon_gpio_data'
 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'dir_bit_offset' not described in 'syscon_gpio_data'
 drivers/gpio/gpio-syscon.c:48: warning: Function parameter or member 'set' not described in 'syscon_gpio_data'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Alexander Shiyan <shc_work@mail.ru>
Link: https://lore.kernel.org/r/20200630133345.2232932-7-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:08 +02:00
Lee Jones 392a584698 gpio: gpio-sama5d2-piobu: Demote all kerneldoc headers to basic comment blocks
No attempt has been made to provide proper descriptions for each of
the function arguments throughout the file.  Simply demote all
kerneldoc headers to basic function headers.

Fixes the following W=1 kernel build warnings:

 drivers/gpio/gpio-sama5d2-piobu.c:59: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_setup_pin'
 drivers/gpio/gpio-sama5d2-piobu.c:59: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_setup_pin'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'mask' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:81: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_write_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:97: warning: Function parameter or member 'mask' not described in 'sama5d2_piobu_read_value'
 drivers/gpio/gpio-sama5d2-piobu.c:116: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_get_direction'
 drivers/gpio/gpio-sama5d2-piobu.c:116: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_get_direction'
 drivers/gpio/gpio-sama5d2-piobu.c:131: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_direction_input'
 drivers/gpio/gpio-sama5d2-piobu.c:131: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_direction_input'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:140: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_direction_output'
 drivers/gpio/gpio-sama5d2-piobu.c:154: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_get'
 drivers/gpio/gpio-sama5d2-piobu.c:154: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_get'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'chip' not described in 'sama5d2_piobu_set'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'pin' not described in 'sama5d2_piobu_set'
 drivers/gpio/gpio-sama5d2-piobu.c:174: warning: Function parameter or member 'value' not described in 'sama5d2_piobu_set'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Andrei Stefanescu <andrei.stefanescu@microchip.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-6-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:07 +02:00
Lee Jones 3cd7f770fe gpio: gpio-pmic-eic-sprd: Fix incorrectly named property 'map'
A good attempt has been made to properly document 'struct
sprd_pmic_eic', but 'map' has been incorrectly described as
'regmap' since the driver's inception in 2018.

Fixes the following W=1 kernel build warning:

 drivers/gpio/gpio-pmic-eic-sprd.c:65: warning: Function parameter or member 'map' not described in 'sprd_pmic_eic'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Baolin Wang <baolin.wang7@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-5-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:07 +02:00
Lee Jones 670647d7c4 gpio: gpio-altera: Add missing kerneldoc entry and demote comment
'struct altera_gpio_chip's 'irq_chip' property is undocumented.  So
add property description to the struct's kerneldoc header.  Also
demote comment block which is clearly not in kerneldoc format.

Fixes the following W=1 warnings:

 drivers/gpio/gpio-altera.c:34: warning: Function parameter or member 'irq_chip' not described in 'altera_gpio_chip'
 drivers/gpio/gpio-altera.c:78: warning: Function parameter or member 'd' not described in 'altera_gpio_irq_set_type'
 drivers/gpio/gpio-altera.c:78: warning: Function parameter or member 'type' not described in 'altera_gpio_irq_set_type'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Joyce Ooi <joyce.ooi@intel.com>
Cc: Tien Hock Loh <thloh@altera.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-3-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:07 +02:00
Lee Jones c5a66b970a gpio: gpiolib-of: Provide documentation for of_gpio_spi_cs_get_count()
Descriptions for of_gpio_spi_cs_get_count()'s 2 arguments are
missing.  Document both 'dev' and 'con_id'.

Fixes the following W=1 kernel build warnings:

 drivers/gpio/gpiolib-of.c:36: warning: Function parameter or member 'dev' not described in 'of_gpio_spi_cs_get_count'
 drivers/gpio/gpiolib-of.c:36: warning: Function parameter or member 'con_id' not described in 'of_gpio_spi_cs_get_count'

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Link: https://lore.kernel.org/r/20200630133345.2232932-2-lee.jones@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-08 09:24:07 +02:00
Geert Uytterhoeven ec75039d55 gpio: aggregator: Use bitmap_parselist() for parsing GPIO offsets
Replace the custom code to parse GPIO offsets and/or GPIO offset ranges
by a call to bitmap_parselist(), and an iteration over the returned bit
mask.

This should have no impact on the format of the configuration parameters
written to the "new_device" virtual file in sysfs.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200701114212.8520-3-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-07 14:30:27 +02:00
Geert Uytterhoeven 2073ea3ab1 gpio: aggregator: Drop pre-initialization in get_arg()
In get_arg(), the variable start is pre-initialized, but overwritten
again in the first statement.  Rework the assignment to not rely on
pre-initialization, to make the code easier to read.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200701114212.8520-2-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-07-07 14:30:27 +02:00
Andy Shevchenko 532e762d51 gpio: pch: Move IRQ status message to verbose debug level
If one of the devices which share the same IRQ line doesn't care about
interrupt GPIO will spam the log with status equal to 0x00. Move IRQ
status message to verbose debug level (it still might be useful).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-07-02 13:16:05 +03:00
Linus Walleij b239e4454e gpio updates for v5.9
- use kobj_to_dev() in sysfs interface
 - kerneldoc and documentation fixes
 - relax the interrupt flags in gpio-mpc8xxx
 - support new model in gpio-pca953x
 - remove a redundant check from gpio-max732x
 - support a new platform in gpio-zynq (+ some minor fixes)
 - don't depend on GPIOLIB when already inside the "if GPIOLIB" in Kconfig
 - support PM ops for suspend in gpio-omap
 - minor tweaks in gpiolib
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Merge tag 'gpio-updates-for-v5.9-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.9

- use kobj_to_dev() in sysfs interface
- kerneldoc and documentation fixes
- relax the interrupt flags in gpio-mpc8xxx
- support new model in gpio-pca953x
- remove a redundant check from gpio-max732x
- support a new platform in gpio-zynq (+ some minor fixes)
- don't depend on GPIOLIB when already inside the "if GPIOLIB" in Kconfig
- support PM ops for suspend in gpio-omap
- minor tweaks in gpiolib
2020-06-30 23:53:11 +02:00
Lee Jones 85b565c99e gpio: gpio-ml-ioh: Fix missing ':' in 'struct ioh_gpio_reg_data
'struct ioh_gpio_reg_data's 'ien_reg' property is missing a ':'
which confuses the kerneldoc tooling/parsers/validators.

Replacing it squashes the following W=1 warning:

 drivers/gpio/gpio-ml-ioh.c:63: warning: Function parameter or member 'ien_reg' not described in 'ioh_gpio_reg_data'

Cc: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-06-30 17:00:11 +03:00
Andy Shevchenko ae66eca000 gpiolib: Deduplicate find_first_zero_bit() call
bitmap_full() is a shortcut to find_first_zero_bit().
Thus, no need to call it twice.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-30 12:39:14 +02:00
Tony Lindgren f02a03985d gpio: omap: Add missing PM ops for suspend
We've had the legacy platform code take care of suspend for us but
this no longer is the case when probed without legacy mode with
ti-sysc. We need to configure PM ops like standard Linux device
drivers do.

As we still have some SoCs booting also the legacy mode, we need to
add omap_gpio_suspend() and omap_gpio_resume(), and check for the
is_suspended flag to avoid legacy _od_suspend_noirq() calling them
on an already suspended GPIO instance.

Once we have no SoCs booting in legacy mode, we can just switch to
using the standard PM ops with pm_runtime_force_suspend() and
pm_runtime_force_resume().

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-30 11:02:45 +02:00
Linus Walleij 93e0272a43 gpio fixes for v5.8-rc3
- several fixes for gpio-pca953x
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Merge tag 'gpio-fixes-for-v5.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into fixes

gpio fixes for v5.8-rc3

- several fixes for gpio-pca953x
2020-06-26 23:53:25 +02:00
Geert Uytterhoeven e4c6a52c64 gpio: Drop superfluous dependencies on GPIOLIB
All config options for GPIO drivers are inside a big "if GPIOLIB ...
endif" block, so there is no reason for individual config options to
have expicit dependencies on GPIOLIB.  Hence remove them.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:19:47 +02:00
Shubhrajyoti Datta 0077428118 gpio: zynq: Remove error prints in EPROBE_DEFER
In case of probe is deferred do not print the errors.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:17:12 +02:00
Shubhrajyoti Datta 73c612fe2a gpio: zynq: Add pmc gpio support
Add PMC gpio support.
Only bank 0,1, 3 and 4 are connected to the multiplexed Input output
pins. Bank 0 and 1 to mio and bank 3 and 4 to extended multiplexed input
output pins.

Versal devices are the industry's first adaptive compute
acceleration platforms.
https://www.xilinx.com/support/documentation/data_sheets/ds950-versal-overview.pdf

On the Versal platform, we are using two customized GPIO controllers(IP)
which were used in Zynq/ZynqMp platform.
One of them present in the Platform Management Controller(PMC) block and
other in Processing System(PS) block.

In PMC_GPIO only Bank0,1,3 & 4 are enabled and in PS_GPIO only
Bank 0 & 3 are enabled.

You can find more details of GPIO IP in ZynqMP TRM General Purpose
I/O(Chapter-27).
https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:16:57 +02:00
Shubhrajyoti Datta 26ebdbf8c2 gpio: zynq: Disable the irq if it is not a wakeup source
If gpio is not set to wake disable the interrupt. ATF set all slaves with
enabled interrupts as wakeup sources and if gpio is used in r5 then it
wakes up linux.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:16:39 +02:00
Shubhrajyoti Datta 675002448e gpio: zynq: Add Versal support
Add Versal support in gpio.
Only bank 0 and 3 are connected to the Multiplexed Input output pins.
Bank 0 to mio and bank3 to fabric Multiplexed input output pins.

Versal devices are the industry's first adaptive compute
acceleration platforms.
https://www.xilinx.com/support/documentation/data_sheets/ds950-versal-overview.pdf

On the Versal platform, we are using two customized GPIO controllers(IP)
which were used in Zynq/ZynqMp platform.
One of them present in the Platform Management Controller(PMC) block and
other in Processing System(PS) block.

In PMC_GPIO only Bank0,1,3 & 4 are enabled and in PS_GPIO only
Bank 0 & 3 are enabled.

You can find more details of GPIO IP in ZynqMP TRM General Purpose
I/O(Chapter-27).
https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:15:50 +02:00
Glenn Langedock fdcfec11b2 gpio: zynq: protect direction in/out with a spinlock
Fix race condition when changing the direction (in/out) of the GPIO pin.
The read-modify-write sequence (as coded in the driver) isn't atomic and
requires synchronization (spinlock).

Signed-off-by: Glenn Langedock <Glenn.Langedock@barco.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-24 12:10:09 +02:00
Andy Shevchenko 5d8913504c gpio: pca953x: Fix GPIO resource leak on Intel Galileo Gen 2
When adding a quirk for IRQ on Intel Galileo Gen 2 the commit ba8c90c618
("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
missed GPIO resource release. We can safely do this in the same quirk, since
IRQ will be locked by GPIO framework when requested and unlocked on freeing.

Fixes: ba8c90c618 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-22 18:51:53 +02:00
Gaurav Singh 8346b92ecd gpio: max732x: remove redundant check from probe()
The pdata is already checked for its validity.
Remove the redundant check.

Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-22 18:50:01 +02:00
Linus Walleij 84651e81ee Merge branch 'ib-for-each-requested' into devel 2020-06-20 23:13:49 +02:00
Andy Shevchenko 7796cdc911 gpio: xra1403: Make use of for_each_requested_gpio()
Make use of for_each_requested_gpio() instead of home grown analogue.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Nandor Han <nandor.han@ge.com>
Cc: Semi Malinen <semi.malinen@ge.com>
Link: https://lore.kernel.org/r/20200615150545.87964-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-20 23:13:27 +02:00
Andy Shevchenko 86661fd7fa gpio: mvebu: Make use of for_each_requested_gpio()
Make use of for_each_requested_gpio() instead of home grown analogue.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200615150545.87964-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-20 23:13:27 +02:00
Kent Gibson 925ca36913 gpiolib: split character device into gpiolib-cdev
Split the cdev specific functionality out of gpiolib.c and into
gpiolib-cdev.c. This improves the readability and maintainability of both
the cdev and core gpiolib code.

Suggested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Link: https://lore.kernel.org/r/20200616093615.5167-1-warthog618@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-20 22:38:37 +02:00
Gaurav Singh 1f6bd574e9 gpio: max732x: remove redundant check
The pdata is already checked for its validity. Remove
this redundant check.

Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
Link: https://lore.kernel.org/r/20200610113630.11922-1-gaurav1086@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-20 22:15:39 +02:00
Andy Shevchenko ec3decd213 gpio: pca953x: disable regmap locking for automatic address incrementing
It's a repetition of the commit aa58a21ae3
  ("gpio: pca953x: disable regmap locking")
which states the following:

  This driver uses its own locking but regmap silently uses
  a mutex for all operations too. Add the option to disable
  locking to the regmap config struct.

Fixes: bcf41dc480 ("gpio: pca953x: fix handling of automatic address incrementing")
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-16 11:22:56 +02:00
Andy Shevchenko 0b22c25e1b gpio: pca953x: Fix direction setting when configure an IRQ
The commit 0f25fda840 ("gpio: pca953x: Zap ad-hoc reg_direction cache")
seems inadvertently made a typo in pca953x_irq_bus_sync_unlock().

When the direction bit is 1 it means input, and the piece of code in question
was looking for output ones that should be turned to inputs.

Fix direction setting when configure an IRQ by injecting a bitmap complement
operation.

Fixes: 0f25fda840 ("gpio: pca953x: Zap ad-hoc reg_direction cache")
Depends-on: 35d13d9489 ("gpio: pca953x: convert to use bitmap API")
Cc: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-16 11:22:41 +02:00
Andy Shevchenko ba8c90c618 gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2
ACPI table on Intel Galileo Gen 2 has wrong pin number for IRQ resource
of one of the I²C GPIO expanders. Since we know what that number is and
luckily have GPIO bases fixed for SoC's controllers, we may use a simple
DMI quirk to match the platform and retrieve GpioInt() pin on it for
the expander in question.

Mika suggested the way to avoid a quirk in the GPIO ACPI library and
here is the second, almost rewritten version of it.

Fixes: f32517bf1a ("gpio: pca953x: support ACPI devices found on Galileo Gen2")
Depends-on: 25e3ef894e ("gpio: acpi: Split out acpi_gpio_get_irq_resource() helper")
Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-16 11:22:20 +02:00
Andy Shevchenko 064c73afe7 gpio: pca953x: Synchronize interrupt handler properly
Since the commit aa58a21ae3 ("gpio: pca953x: disable regmap locking")
the locking of regmap is disabled and that immediately introduces
a synchronization issue. It's easy to see when we try to monitor
more than one interrupt from the same chip.

It seems that the problem exists from the day one and even commit
6e20fb1805 ("drivers/gpio/pca953x.c: add a mutex to fix race condition")
missed this.

Below are the traces and shell reproducers before and after proposed change.
Note duplicates in the IRQ events. /proc/interrupts also shows a deviation,
i.e. sum of children interrupts higher than parent's one.

When locking is disabled for regmap and no protection in IRQ handler
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ...
 gpioset-194          regmap_hw_write_start: i2c-INT3491:02 reg=2 count=1
 irq/31-i2c-INT3-139  regmap_hw_read_start: i2c-INT3491:02 reg=4c count=2
 gpioset-194          regmap_hw_write_done: i2c-INT3491:02 reg=2 count=1
 gpioset-194          regmap_reg_read_cache: i2c-INT3491:02 reg=6 val=f5
 gpioset-194          regmap_reg_write: i2c-INT3491:02 reg=6 val=f5
 gpioset-194          regmap_hw_write_start: i2c-INT3491:02 reg=6 count=1
 irq/31-i2c-INT3-139  regmap_hw_read_done: i2c-INT3491:02 reg=4c count=2
 ...

 % gpiomon gpiochip3 0 &
 % gpioset gpiochip3 1=0
 % gpioset gpiochip3 1=1
 event:  RISING EDGE offset: 0 timestamp: [     302.782583765]
 % gpiomon gpiochip3 2 &
 % gpioset gpiochip3 1=0
 event:  RISING EDGE offset: 2 timestamp: [     312.033148829]
 event: FALLING EDGE offset: 0 timestamp: [     312.022757525]
 % gpioset gpiochip3 1=1
 event:  RISING EDGE offset: 2 timestamp: [     316.201148473]
 event:  RISING EDGE offset: 0 timestamp: [     316.191759599]

When locking is disabled for regmap and protection in IRQ handler
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ...
 gpioset-202          regmap_hw_write_start: i2c-INT3491:02 reg=2 count=1
 gpioset-202          regmap_hw_write_done: i2c-INT3491:02 reg=2 count=1
 gpioset-202          regmap_reg_read_cache: i2c-INT3491:02 reg=6 val=fd
 gpioset-202          regmap_reg_write: i2c-INT3491:02 reg=6 val=fd
 gpioset-202          regmap_hw_write_start: i2c-INT3491:02 reg=6 count=1
 gpioset-202          regmap_hw_write_done: i2c-INT3491:02 reg=6 count=1
 irq/31-i2c-INT3-139  regmap_hw_read_start: i2c-INT3491:02 reg=4c count=2
 irq/31-i2c-INT3-139  regmap_hw_read_done: i2c-INT3491:02 reg=4c count=2
 ...

 % gpiomon gpiochip3 0 &
 % gpioset gpiochip3 1=0
 event: FALLING EDGE offset: 0 timestamp: [     531.330078107]
 % gpioset gpiochip3 1=1
 event:  RISING EDGE offset: 0 timestamp: [     532.912239128]
 % gpiomon gpiochip3 2 &
 % gpioset gpiochip3 1=0
 event: FALLING EDGE offset: 0 timestamp: [     539.633669484]
 % gpioset gpiochip3 1=1
 event:  RISING EDGE offset: 0 timestamp: [     542.256978461]

Fixes: 6e20fb1805 ("drivers/gpio/pca953x.c: add a mutex to fix race condition")
Depends-on: 35d13d9489 ("gpio: pca953x: convert to use bitmap API")
Depends-on: 4942723276 ("gpio: pca953x: Perform basic regmap conversion")
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Roland Stigge <stigge@antcom.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-16 11:21:51 +02:00
Jan Kiszka 3ba3ff5c09 gpio: pca953x: Add support for the PCAL9535
The PCAL9535 is compatible to the PCA9535. Additionally, it comes with
interrupt support and input latching. Other features are not supported
by the GPIO subsystem.

Datasheet: https://www.nxp.com/docs/en/data-sheet/PCAL9535A.pdf
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-16 10:49:18 +02:00
Navid Emamdoost 861254d826 gpio: arizona: put pm_runtime in case of failure
Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count if pm_runtime_put is not called in
error handling paths. Call pm_runtime_put if pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200605030052.78235-1-navid.emamdoost@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-16 10:38:07 +02:00
Navid Emamdoost e6f390a834 gpio: arizona: handle pm_runtime_get_sync failure case
Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200605025207.65719-1-navid.emamdoost@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-06-16 10:38:07 +02:00
Kieran Bingham 3abda79aa1 drivers: gpio: Fix trivial spelling
The word 'descriptor' is misspelled throughout the tree.

Fix it up accordingly:
    decriptors -> descriptors

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-15 10:15:29 +02:00
Song Hui 3d5bfbd971 gpio: mpc8xxx: change the gpio interrupt flags.
Delete the interrupt IRQF_NO_THREAD flags in order to gpio interrupts
can be threaded to allow high-priority processes to preempt.

Signed-off-by: Song Hui <hui.song_1@nxp.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-15 10:14:37 +02:00
Wang Qing 97cd738c44 gpiolib: sysfs: use kobj_to_dev
Use kobj_to_dev() API instead of container_of().

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-06-15 10:07:49 +02:00
Masahiro Yamada a7f7f6248d treewide: replace '---help---' in Kconfig files with 'help'
Since commit 84af7a6194 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

  a) 4 spaces + '---help---'
  b) 7 spaces + '---help---'
  c) 8 spaces + '---help---'
  d) 1 space + 1 tab + '---help---'
  e) 1 tab + '---help---'    (correct indentation)
  f) 1 tab + 1 space + '---help---'
  g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

  $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-06-14 01:57:21 +09:00
Linus Torvalds e611c0fe31 USB/PHY driver updates for 5.8-rc1
Here are the large set of USB and PHY driver updates for 5.8-rc1.
 
 Nothing huge, just lots of little things:
 	- USB gadget fixes and additions all over the place
 	- new PHY drivers
 	- PHY driver fixes and updates
 	- XHCI driver updates
 	- musb driver updates
 	- more USB-serial driver ids added
 	- various USB quirks added
 	- thunderbolt minor updates and fixes
 	- typec updates and additions
 
 Full details are in the shortlog.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/PHY driver updates from Greg KH:
 "Here are the large set of USB and PHY driver updates for 5.8-rc1.

  Nothing huge, just lots of little things:

   - USB gadget fixes and additions all over the place

   - new PHY drivers

   - PHY driver fixes and updates

   - XHCI driver updates

   - musb driver updates

   - more USB-serial driver ids added

   - various USB quirks added

   - thunderbolt minor updates and fixes

   - typec updates and additions

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (245 commits)
  usb: dwc3: meson-g12a: fix USB2 PHY initialization on G12A and A1 SoCs
  usb: dwc3: meson-g12a: fix error path when fetching the reset line fails
  Revert "dt-bindings: usb: qcom,dwc3: Convert USB DWC3 bindings"
  Revert "dt-bindings: usb: qcom,dwc3: Add compatible for SC7180"
  Revert "dt-bindings: usb: qcom,dwc3: Introduce interconnect properties for Qualcomm DWC3 driver"
  USB: serial: ch341: fix lockup of devices with limited prescaler
  USB: serial: ch341: add basis for quirk detection
  CDC-ACM: heed quirk also in error handling
  USB: serial: option: add Telit LE910C1-EUX compositions
  usb: musb: Fix runtime PM imbalance on error
  usb: musb: jz4740: Prevent lockup when CONFIG_SMP is set
  usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle
  usb: musb: use true for 'use_dma'
  usb: musb: start session in resume for host port
  usb: musb: return -ESHUTDOWN in urb when three-strikes error happened
  USB: serial: qcserial: add DW5816e QDL support
  thunderbolt: Add trivial .shutdown
  usb: dwc3: keystone: Turn on USB3 PHY before controller
  dt-bindings: usb: ti,keystone-dwc3.yaml: Add USB3.0 PHY property
  dt-bindings: usb: convert keystone-usb.txt to YAML
  ...
2020-06-07 09:42:16 -07:00
Linus Torvalds 3f7e82379f This is the bulk of GPIO changes for the v5.8 kernel cycle.
Core changes:
 
 - A new GPIO aggregator driver has been merged: this can
   join a few select GPIO lines into a new aggregated GPIO
   chip. This can be used for security: a process can be
   granted access to only these lines, for example for
   industrial control. Another way to use this is to
   reexpose certain select lines to a virtual machine or
   container.
 
 - Warn if the gpio-line-names is too long in he DT parser
   core.
 
 - GPIO lines can now be looked up by line name in addition
   to being looked up by offset.
 
 New drivers:
 
 - A new generic regmap GPIO driver has been merged. Too
   many regmap drivers are starting to look like each other
   so we need to create some common ground and try to move
   drivers over to using that.
 
 - The F7188X driver now supports F81865.
 
 Driver improvements:
 
 - Large improvements to the PCA953x expander, get multiple lines
   and several cleanups.
 
 - Large improvements to the DesignWare DWAPB driver, and Sergey
   Semin has volunteered to maintain it.
 
 - PL061 can now be built as a module, this is part of a bigger
   effort to make the ARM platforms more modular.
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Merge tag 'gpio-v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v5.8 kernel cycle.

  Core changes:

   - A new GPIO aggregator driver has been merged: this can join a few
     select GPIO lines into a new aggregated GPIO chip. This can be used
     for security: a process can be granted access to only these lines,
     for example for industrial control. Another way to use this is to
     reexpose certain select lines to a virtual machine or container.

   - Warn if the gpio-line-names is too long in he DT parser core.

   - GPIO lines can now be looked up by line name in addition to being
     looked up by offset.

  New drivers:

   - A new generic regmap GPIO driver has been merged. Too many regmap
     drivers are starting to look like each other so we need to create
     some common ground and try to move drivers over to using that.

   - The F7188X driver now supports F81865.

  Driver improvements:

   - Large improvements to the PCA953x expander, get multiple lines and
     several cleanups.

   - Large improvements to the DesignWare DWAPB driver, and Sergey Semin
     has volunteered to maintain it.

   - PL061 can now be built as a module, this is part of a bigger effort
     to make the ARM platforms more modular"

* tag 'gpio-v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
  gpio: pca953x: Drop unneeded ACPI_PTR()
  MAINTAINERS: Add gpio regmap section
  gpio: add a reusable generic gpio_chip using regmap
  gpiolib: Introduce gpiochip_irqchip_add_domain()
  gpio: gpiolib: Allow GPIO IRQs to lazy disable
  gpiolib: Separate GPIO_GET_LINEINFO_WATCH_IOCTL conditional
  gpio: rcar: Fix runtime PM imbalance on error
  gpio: pca935x: Allow IRQ support for driver built as a module
  gpio: pxa: Add COMPILE_TEST support
  dt-bindings: gpio: Add renesas,em-gio bindings
  MAINTAINERS: Fix file name for DesignWare GPIO DT schema
  gpio: dwapb: Remove unneeded has_irq member in struct dwapb_port_property
  gpio: dwapb: Don't use IRQ 0 as valid Linux interrupt
  gpio: dwapb: avoid error message for optional IRQ
  gpio: dwapb: Call acpi_gpiochip_free_interrupts() on GPIO chip de-registration
  gpio: max730x: bring gpiochip_add_data after port config
  MAINTAINERS: Add GPIO Aggregator section
  docs: gpio: Add GPIO Aggregator documentation
  gpio: Add GPIO Aggregator
  gpiolib: Add support for GPIO lookup by line name
  ...
2020-06-05 14:00:30 -07:00
Linus Torvalds f6606d0c00 The generic interrupt departement provides:
- Cleanup of the irq_domain API
   - Overhaul of the interrupt chip simulator
   - The usual pile of new interrupt chip drivers
   - Cleanups, improvements and fixes all over the place
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Merge tag 'irq-core-2020-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "The generic interrupt departement provides:

   - Cleanup of the irq_domain API

   - Overhaul of the interrupt chip simulator

   - The usual pile of new interrupt chip drivers

   - Cleanups, improvements and fixes all over the place"

* tag 'irq-core-2020-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  irqchip: Fix "Loongson HyperTransport Vector support" driver build on all non-MIPS platforms
  dt-bindings: interrupt-controller: Add Loongson PCH MSI
  irqchip: Add Loongson PCH MSI controller
  dt-bindings: interrupt-controller: Add Loongson PCH PIC
  irqchip: Add Loongson PCH PIC controller
  dt-bindings: interrupt-controller: Add Loongson HTVEC
  irqchip: Add Loongson HyperTransport Vector support
  genirq: Check irq_data_get_irq_chip() return value before use
  irqchip/sifive-plic: Improve boot prints for multiple PLIC instances
  irqchip/sifive-plic: Setup cpuhp once after boot CPU handler is present
  irqchip/sifive-plic: Set default irq affinity in plic_irqdomain_map()
  irqchip/gic-v2, v3: Drop extra IRQ_NOAUTOEN setting for (E)PPIs
  irqdomain: Allow software nodes for IRQ domain creation
  irqdomain: Get rid of special treatment for ACPI in __irq_domain_add()
  irqdomain: Make __irq_domain_add() less OF-dependent
  iio: dummy_evgen: Fix use after free on error in iio_dummy_evgen_create()
  irqchip/gic-v3-its: Balance initial LPI affinity across CPUs
  irqchip/gic-v3-its: Track LPI distribution on a per CPU basis
  genirq/irq_sim: Simplify the API
  irqdomain: Make irq_domain_reset_irq_data() available to  non-hierarchical users
  ...
2020-06-03 10:05:11 -07:00