The clock generation system in the ep93xx uses two external oscillator's
and two internal PLLs to derive all the internal clocks. Many of these
internal clocks can be stopped to save power.
This introduces a "parent" hierarchy for the clocks so that the users
count can be correctly tracked for power management.
The "parent" for the video clock can either be one of the PLL outputs
or the external oscillator. In order to correctly track the "parent"
for the video clock calc_clk_div() needed to be modified. It now
returns an error code if the desired rate cannot be generated.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Update the ep93xx i2c support:
1) The platform init code passes the configuration data for the
i2c-gpio driver. This allows any gpio pin do be used for the
sda and scl pins. It also allows the platform to specify the
udelay and timeout.
2) Program the gpio configuration register to enable/disable the
open drain drivers. Note that this really only works if the
sda and scl pins are set to EP93XX_GPIO_LINE_EEDAT and
EP93XX_GPIO_LINE_EECLK.
3) Update the edb93xx.c platform init to use the new support.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Most of the EP93XX_GPIO_*_INT_* register defines in ep93xx-regs.h
not required due to how the ep93xx core and gpiolib support handle
gpio interrupts. Remove the defines to prevent future confusion.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Change the #define's for the EP93XX_*_PHYS_BASE addresses to use
macros for easier readability.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add Contec Micro9-Slim support
Cc: Ryan Mallon <ryan@bluewatersys.com>
Requires: 5750/1
Signed-off-by: Hubert Feurstein <hubert.feurstein@contec.at>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
From: Ryan Mallon <ryan@bluewatersys.com>
Change the gpio_to_irq and irq_to_gpio static inline functions to
macros so that they can be used in variable initialisers.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This adds the missing Kconfig options for the first SDRAM bank address
on ep93xx boards.
Cc: Hubert Feurstein <(address hidden)>
Signed-off-by: H Hartley Sweeten <(address hidden)>
Acked-by: Ryan Mallon <(address hidden)>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Daniele Venzano <linux@brownhat.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The kernel.h macro DIV_ROUND_CLOSEST performs the computation
(x + d/2)/d but is perhaps more readable.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@haskernel@
@@
@depends on haskernel@
expression x,__divisor;
@@
- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The EP93xx features two PWMs (one on the EP9307) with the following
features:
* Configurable dual output
* Separate input clocks for each PWM output
* 16-bit resolution
* Programmable pulse width (duty cycle), interval (frequency), and
polarity
This adds the necessary core support as well as the driver. A sysfs
interface is provided to control the PWM outputs.
Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Update the NOR flash support for TS-7200.
The TS-7200 models all have 16-bit NOR flash. Update the platform
init to support this.
Remove the private TS72XX_NOR_* defines and use the common ep93xx
defines for the external chip select physical base address instead.
Move the NOR flash registration into a static __init function. When
the NAND flash support is updated this function will also be used
to register the NAND flash for the TS-7250 and TS-7260.
Tested-by: Matthieu Crapet <mcrapet@gmail.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The EP93xx has two gpio pins specifically assigned to drive
external LEDs. Add core support for these LEDs.
On the EDB93xx development boards, the rdled is connected to
an external reset circuit. Turning this led on for an extended
amount of time will cause the circuit to issue a manual reset.
Refer to Cirrus App Note AN258 for more information.
http://www.cirrus.com/en/pubs/appNote/AN258REV2.pdf
This led can be safely used as the system heartbeat with the
ledtrig-heartbeat driver.
echo heartbeat > /sys/class/leds/platform:rdled/trigger
The grled can be used for any desired purpose.
Tested-by: Matthieu Crapet <mcrapet@gmail.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add missing register defines for ep93xx keypad clock support.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Change the reg argument of the ep93xx_syscon_swlocked_write function
to be an __iomem pointer. Fixes a number of build warnings.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix a number of build errors in ep93xx gpio.c due to to missing irq.h
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The MAC address for the ep93xx ethernet driver can be optionally
copied from registers in the controller when booting. Due to
[ARM] 5573/1: ep93xx: ensure typesafe io, the cast for the source
address is no longer needed.
EP93XX_ETHERNET_BASE is typed as a (void __iomem __force *) so
memcpy_fromio() needs to be used instead of memcpy().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The EP93XX_VIC{1/2}_BASE defines are now typesafe due to
[ARM] 5573/1: ep93xx: ensure typesafe io. The (void *) cast
is not needed when calling vic_init().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
To ensure typesafe io, the enable_reg variable should be a
void __iomem pointer not u32.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/mach-ep93xx/include/mach/hardware.h
1. Properly name the include files so that they are loaded
from the <mach/*> directory and not the local directory.
2. Remove including the ts72xx.h header. This header is not
generic to the ep93xx platform. It should only be included
by the ts72xx specific files that require it. The only
two users in the tree are arch/arm/mach-ep93xx/ts72xx.c
and drivers/mtd/nand/ts7250.c.
arch/arm/mach-ep93xx/include/mach/ts72xx.h
1. <linux/io.h> should already be included by any user of this
header. Doing the include here hides it from being needed
by the calling source file.
arch/arm/mach-ep93xx/core.c
1. Remove unnecessary headers. They were probably included
originally due to cut-and-paste from other files.
2. <linux/io.h> should be included not <mach/gpio.h>
arch/arm/mach-ep93xx/adsphere.c
arch/arm/mach-ep93xx/edb93xx.c
arch/arm/mach-ep93xx/gesbc9312.c
arch/arm/mach-ep93xx/micro9.c
arch/arm/mach-ep93xx/ts72xx.c
1. Remove unnecessary headers.
arch/arm/mach-ep93xx/ts72xx.c
1. Remove unnecessary headers.
2. Add platform specific header <mach/ts72xx.h>.
drivers/mtd/nand/ts7250.c
1. <linux/io.h> should be included not <asm/io.h>.
2. Add platform specific header <mach/ts72xx.h>.
Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
<linux/io.h> was getting included by <mach/ts72xx.h>, is should be
included by this file.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add clkdev support for the ep93xx_keypad driver.
A matrix keypad driver for the ep93xx just got merged via the
input subsystem group. For this driver to work the keypad clock
needs to be added to the ep93xx clkdev support. In order to
accomplish this the following changes are implemented:
1) Move the EP93XX_EXT_*_RATE defines to mach/include/hardware.h.
2) Add EP93XX_KEYTCHCLK_DIV{4/16} for the keypad driver.
3) Add support for programmable clocks (set_rate() callback).
4) Add clk_keypad for the keypad driver.
5) tab indent the clk_lookup table for easier reading.
6) Add the set_rate() callback to program the keypad clock.
This callback is generalized since the ADC clock (touchscreen)
can use the same callback.
7) Use the ep93xx_syscon_swlocked_write() core function for updating
the software locked register.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add core functions to handle writes to the ep93xx software locked
registers.
There are a number of registers in the EP93xx System Controller
that require a write to the software lock register before they
can be updated. This patch adds a number of exported functions
to the ep93xx core that handle this access.
The software locked clock divider registers, VidClkDiv, MIRClkDiv,
I2SClkDiv and KeyTchClkDiv would typically involve writing a
specific value to the register. To support this the
ep93xx_syscon_swlocked_write() function is provided.
For the DeviceCfg register it's more typical to only need to
set or clear a single bit. A generic ep93xx_devcfg_set_clear()
function is provided to handle both operations. Two inline
functions, ep93xx_devcfg_set_bits() and ep93xx_devcfg_clear_bits()
are also provided to improve code readability.
In addition, the remaining bits in the System Controller Device
Config Register have been documented and the previously defined
names shortened.
All code paths that use this functionality have been updated
except for arch/arm/kernel/crunch.c. That code is in a context
switch path, which is not reentrant, so it is safe against itself.
Cc: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ep93xx: Show gpio interrupt type in debugfs output.
EP93xx uses a private implementation for the debugfs output.
Modify this output so it includes the interrupt type when the
gpio is configured as an interrupt
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix ep93xx gpio.c header includes and __iomem pointers.
1. <linux/gpio.h> should be included instead of <asm/gpio.h>
2. <mach/hardware.h> should be included instead of <mach/ep93xx-regs.h>
3. data_reg and data_dir_reg in struct ep93xx_gpio_chip should be
void __iomem pointers not unsigned int
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: ep93xx: ensure typesafe io
For the ep93xx platform, all EP93XX_*_BASE defines are based
on virtual addresses. Ensure that all these defines are
properly typesafe for the __raw_{read/write}* macros.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (35 commits)
Input: add driver for Synaptics I2C touchpad
Input: synaptics - add support for reporting x/y resolution
Input: ALPS - handle touchpoints buttons correctly
Input: gpio-keys - change timer to workqueue
Input: ads7846 - pin change interrupt support
Input: add support for touchscreen on W90P910 ARM platform
Input: appletouch - improve finger detection
Input: wacom - clear Intuos4 wheel data when finger leaves proximity
Input: ucb1400 - move static function from header into core
Input: add driver for EETI touchpanels
Input: ads7846 - more detailed model name in sysfs
Input: ads7846 - support swapping x and y axes
Input: ati_remote2 - use non-atomic bitops
Input: introduce lm8323 keypad driver
Input: psmouse - ESD workaround fix for OLPC XO touchpad
Input: tsc2007 - make sure platform provides get_pendown_state()
Input: uinput - flush all pending ff effects before destroying device
Input: simplify name handling for certain input handles
Input: serio - do not use deprecated dev.power.power_state
Input: wacom - add support for Intuos4 tablets
...
ep93xx: get_uart_rate() uses the constants EP93XX_SYSCON_CLOCK_CONTROL
and EP93XX_SYSCON_CLOCK_UARTBAUD, which no longer exist. Use
EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCNT_UARTBAUD instead
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Update the dma clocks so that the magic numbers are named.
All the dma clocks have an enable bit to turn them on/off as
needed. Currently these bits are in the code as "magic"
numbers. This changes all of them to named defines to
improve code readability.
Also, the EP93XX_SYSCON_CLOCK_CONTROL register is improperly
named. In the EP93xx User's Guide this register is called
PwrCnt (Power Control). All of the uses of this register
are associated with the clock support so this patch also
modifies the names to match the User's Guide.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix trivial spelling error in arch/arm/mach-ep93xx/core.c
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cleanup the ohci-ep93xx driver.
1) Use the usb.h dbg() macro instead of pr_debug() so that
the source filename is prefixed to the message and it is
terminated with a linefeed.
2) Add error handling for the clk_get() call.
3) Update clkdev support so that the usb clock is matched by
the dev_id instead of the con_id.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch adds a Kconfig option to select between ep93xx boards which
boot from the SDRAM bank at 0x00000000 (SDCE3/SyncBoot) and those which
boot from 0xc0000000 (SDCE0). This corrects a problem which causes
invalid images to be built for boards which boot from 0xc0000000.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix the clkdev API support for the ep93xx uart clocks.
The uarts available in the ep93xx have individual clock controls.
The current implementation assumes that the bootloader has enabled
the clocks before the kernel has booted. It also assumes that the
bootloader has set the UARTBAUD bit indicating that the uarts are
running off the 14.7456MHz external crystal.
This fixes both issues. It also allows the uart clocks to be stopped
when there are no users.
Tested-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The Cirrus Logic EDB93xx development board platform init files
share redundant code. The only differences are in the flash
memory configuration, MACH_TYPE, and additional on-board
I2C devices. This patch merges all of them into one file.
Cc: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Herbert Valerio Riedel <hvr@gnu.org>
Cc: Toufeeq Hussain <toufeeq_hussain@infosys.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add power management support to the VIC by registering
each VIC as a system device to get suspend/resume
events going.
Since the VIC registeration is done early, we need to
record the VICs in a static array which is used to add
the system devices later once the initcalls are run. This
means there is now a configuration value for the number
of VICs in the system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Update the rtc-ep93xx driver to use ioremap'ed addresses.
This removes the dependency on <mach/hardware.h> and properly
reports the memory addresses used by the driver in /proc/iomem.
In addition, ep93xx_rtc_init() is updated to use
platform_driver_probe() instead of platform_driver_register().
Also, the device_create_file() calls are now properly checked for
error conditions. The created sysfs files are also now removed
when the driver is removed.
The version number for the driver has been bumped at the request
of Alessandro Zummo.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This is a keyboard driver for the Cirrus Logic EP93xx keypad matrix
peripheral. This driver is based on the pxa27x_keypad driver.
[dtor@mail.ru: Plug in input_dev->keycode so keymap can be changed
from userspace.]
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Fix trivial build warning due to incompatible pointer type.
ep93xx_timer_interrupt() has the wrong return type causing a
warning during the build.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
OMAP wishes to pass state to the boot loader upon reboot in order to
instruct it whether to wait for USB-based reflashing or not. There is
already a facility to do this via the reboot() syscall, except we ignore
the string passed to machine_restart().
This patch fixes things to pass this string to arch_reset(). This means
that we keep the reboot mode limited to telling the kernel _how_ to
perform the reboot which should be independent of what we request the
boot loader to do.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix build warnings due to struct i2c_board_info in <mach/platform.h>
Patch "5311/1: add core support for built in i2c bus" is causing 11 of
39 the build warnings with Kautobuild for ep93xx_defconfig on kernel
2.6.29-rc5-git4. This patch fixes it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Hartley Sweeten