linux-stable.git/drivers/pwm, branch v3.12

Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2013-09-06T20:21:16+00:00

Pull ARM SoC cleanups from Olof Johansson:
 "This branch contains code cleanups, moves and removals for 3.12.

  There's a large number of various cleanups, and a nice net removal of
  13500 lines of code.

  Highlights worth mentioning are:

   - A series of patches from Stephen Boyd removing the ARM local timer
     API.
   - Move of Qualcomm MSM IOMMU code to drivers/iommu.
   - Samsung PWM driver cleanups from Tomasz Figa, removing legacy PWM
     driver and switching over to the drivers/pwm one.
   - Removal of some unusued auto-generated headers for OMAP2+ (PRM/CM).

  There's also a move of a header file out of include/linux/i2c/ to
  platform_data, where it really belongs.  It touches mostly ARM
  platform code for include changes so we took it through our tree"

* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
  ARM: OMAP2+: Add back the define for AM33XX_RST_GLOBAL_WARM_SW_MASK
  gpio: (gpio-pca953x) move header to linux/platform_data/
  arm: zynq: hotplug: Remove unreachable code
  ARM: SAMSUNG: Remove unnecessary exynos4_default_sdhci*()
  tegra: simplify use of devm_ioremap_resource
  ARM: SAMSUNG: Remove plat/regs-timer.h header
  ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header
  ARM: SAMSUNG: Remove pwm-clock infrastructure
  ARM: SAMSUNG: Remove old PWM timer platform devices
  pwm: Remove superseded pwm-samsung-legacy driver
  ARM: SAMSUNG: Modify board files to use new PWM platform device
  ARM: SAMSUNG: Rework private data handling in dev-backlight
  pwm: Add new pwm-samsung driver
  ARM: mach-mvebu: remove redundant DT parsing and validation
  ARM: msm: Only compile io.c on platforms that use it
  iommu/msm: Move mach includes to iommu directory
  ARM: msm: Remove devices-iommu.c
  ARM: msm: Move mach/board.h contents to common.h
  ARM: msm: Migrate msm_timer to CLOCKSOURCE_OF_DECLARE
  ARM: msm: Remove TMR and TMR0 static mappings
  ...

pwm: pxa: Use module_platform_driver

2013-09-03T11:09:17+00:00

Commit 76abbdde2d95a3807d0dc6bf9f84d03d0dbd4f3d

    pwm: Add sysfs interface

causes a kernel oops due to a null pointer dereference on PXA platforms.
This happens because the class added by the patch is registered in a
subsys_initcall (initcall4), but the pxa pwm driver is registered in
arch_initcall (initcall3). If the class is not registered before the
driver probe function runs, the oops occurs in device_add() when the
uninitialized pointers in struct class are dereferenced.  I don't see a
reason that the driver must be an arch_initcall, so this patch makes it
a regular module_platform_driver (initcall6), preventing the oops.

Signed-off-by: Mike Dunn 
Acked-by: Robert Jarzmik 
Acked-by: Marek Vasut 
Signed-off-by: Thierry Reding

pwm: tiehrpwm: add missing __iomem annotation

2013-09-03T11:09:16+00:00

Fix the following sparse warnings:

drivers/pwm/pwm-tiehrpwm.c:144:16: warning: incorrect type in argument 1 (different address spaces)
drivers/pwm/pwm-tiehrpwm.c:144:16:    expected void const volatile [noderef] *addr
drivers/pwm/pwm-tiehrpwm.c:144:16:    got void *
drivers/pwm/pwm-tiehrpwm.c:149:9: warning: incorrect type in argument 2 (different address spaces)
drivers/pwm/pwm-tiehrpwm.c:149:9:    expected void volatile [noderef] *addr
drivers/pwm/pwm-tiehrpwm.c:149:9:    got void *
drivers/pwm/pwm-tiehrpwm.c:157:18: warning: incorrect type in argument 1 (different address spaces)
drivers/pwm/pwm-tiehrpwm.c:157:18:    expected void const volatile [noderef] *addr
drivers/pwm/pwm-tiehrpwm.c:157:18:    got void *
drivers/pwm/pwm-tiehrpwm.c:160:9: warning: incorrect type in argument 2 (different address spaces)
drivers/pwm/pwm-tiehrpwm.c:160:9:    expected void volatile [noderef] *addr
drivers/pwm/pwm-tiehrpwm.c:160:9:    got void *

Signed-off-by: Jingoo Han 
Signed-off-by: Thierry Reding

pwm: tiecap: add CONFIG_PM_SLEEP to ecap_pwm_{save,restore}_context()

2013-09-03T11:09:16+00:00

ecap_pwm_save_context() and ecap_pwm_restore_context() are only used
when CONFIG_PM_SLEEP is selected.

drivers/pwm/pwm-tiecap.c:293:13: warning: 'ecap_pwm_save_context' defined but not used [-Wunused-function]
drivers/pwm/pwm-tiecap.c:302:13: warning: 'ecap_pwm_restore_context' defined but not used [-Wunused-function]

Signed-off-by: Jingoo Han 
Signed-off-by: Thierry Reding

pwm: simplify use of devm_ioremap_resource

2013-09-03T11:09:16+00:00

Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// 
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// 

Signed-off-by: Julia Lawall 
Acked-by: Viresh Kumar 
Signed-off-by: Thierry Reding

pwm: renesas-tpu: Add DT support

2013-09-03T11:09:15+00:00

Specify DT bindings for the TPU PWM controller and add OF support to the
driver.

Signed-off-by: Laurent Pinchart 
Acked-by: Stephen Warren 
Signed-off-by: Thierry Reding

pwm: Use the DT macro directly when parsing PWM DT flags

2013-09-03T11:08:10+00:00

Don't redefine a PWM_SPEC_POLARITY macro with a value identical to
PWM_POLARITY_INVERTED, use the PWM DT macro directly.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Stephen Warren 
Signed-off-by: Thierry Reding

pwm: mxs: Check the return value from stmp_reset_block()

2013-09-03T11:07:51+00:00

stmp_reset_block() may fail, so let's check its return value and
propagate it in the case of error.

Signed-off-by: Fabio Estevam 
Signed-off-by: Thierry Reding

pwm: Remove superseded pwm-samsung-legacy driver

2013-08-12T19:53:23+00:00

This patch removes the now unused pwm-samsung-legacy driver, which was
replaced by new pwm-samsung driver.

Signed-off-by: Tomasz Figa 
Reviewed-by: Sylwester Nawrocki 
Tested-by: Heiko Stuebner 
Tested-by: Mark Brown 
Tested-by: Sylwester Nawrocki 
Acked-by: Arnd Bergmann 
Acked-by: Thierry Reding

pwm: Add new pwm-samsung driver

2013-08-12T19:53:22+00:00

This patch introduces new Samsung PWM driver, which is completely
rewritten to be multiplatform- and DeviceTree-aware.

In addition, remaining problems of old driver are fixed, such as:
 - proper handling of hardware variants,
 - synchronization on SMP systems,
 - handling of boundary parameter values,
 - hardware sharing with PWM clocksource driver,
 - undefined state of PWM output after stopping PWM channel.

Signed-off-by: Tomasz Figa 
Reviewed-by: Sylwester Nawrocki 
Tested-by: Heiko Stuebner 
Tested-by: Mark Brown 
Tested-by: Sylwester Nawrocki 
Acked-by: Arnd Bergmann 
Acked-by: Thierry Reding