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path: root/drivers/pwm
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2013-09-06Merge tag 'cleanup-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 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header ARM: SAMSUNG: Remove pwm-clock infrastructure ARM: SAMSUNG: Remove old PWM timer platform devices pwm: Remove superseded pwm-samsung-legacy driver ARM: SAMSUNG: Modify board files to use new PWM platform device ARM: SAMSUNG: Rework private data handling in dev-backlight pwm: Add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 ...
2013-09-03pwm: pxa: Use module_platform_driverMike Dunn
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 <mikedunn@newsguy.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: tiehrpwm: add missing __iomem annotationJingoo Han
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] <asn:2>*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] <asn:2>*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] <asn:2>*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] <asn:2>*addr drivers/pwm/pwm-tiehrpwm.c:160:9: got void * Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: tiecap: add CONFIG_PM_SLEEP to ecap_pwm_{save,restore}_context()Jingoo Han
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 <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: simplify use of devm_ioremap_resourceJulia Lawall
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/) // <smpl> @@ 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); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: renesas-tpu: Add DT supportLaurent Pinchart
Specify DT bindings for the TPU PWM controller and add OF support to the driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: Use the DT macro directly when parsing PWM DT flagsLaurent Pinchart
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 <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-09-03pwm: mxs: Check the return value from stmp_reset_block()Fabio Estevam
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 <fabio.estevam@freescale.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-08-12pwm: Remove superseded pwm-samsung-legacy driverTomasz Figa
This patch removes the now unused pwm-samsung-legacy driver, which was replaced by new pwm-samsung driver. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Mark Brown <broonie@linaro.org> Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thierry Reding <thierry.reding@gmail.com>
2013-08-12pwm: Add new pwm-samsung driverTomasz Figa
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 <tomasz.figa@gmail.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Mark Brown <broonie@linaro.org> Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thierry Reding <thierry.reding@gmail.com>
2013-08-06pwm: samsung: Rename to pwm-samsung-legacyTomasz Figa
This patch renames the old pwm-samsung driver to pwm-samsung-legacy to create place for the new, rewritten, DT-aware pwm-samsung driver. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Mark Brown <broonie@linaro.org> Tested-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thierry Reding <thierry.reding@gmail.com>
2013-07-29pwm: convert class code to use dev_groupsGreg Kroah-Hartman
The dev_attrs field of struct class is going away soon, dev_groups should be used instead. This converts the PWM class code to use the correct field. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-26pwm: pwm-tiehrpwm: Use clk_enable/disable instead clk_prepare/unprepare.Marek Belisko
This was found when using pwm-led on am33xx and enable heartbeat trigger. [ 808.624876] ================================= [ 808.629443] [ INFO: inconsistent lock state ] [ 808.634021] 3.9.0 #2 Not tainted [ 808.637415] --------------------------------- [ 808.641981] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 808.648288] swapper/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 808.653494] (prepare_lock){+.?.+.}, at: [<c027c211>] clk_unprepare+0x15/0x24 [ 808.661040] {SOFTIRQ-ON-W} state was registered at: [ 808.666155] [<c004ec4d>] __lock_acquire+0x411/0x824 [ 808.671465] [<c004f359>] lock_acquire+0x41/0x50 [ 808.676412] [<c039ee9d>] mutex_lock_nested+0x31/0x1d8 [ 808.681912] [<c027c275>] clk_prepare+0x15/0x28 [ 808.686764] [<c0590c6b>] _init+0x117/0x1e0 [ 808.691256] [<c0019ef9>] omap_hwmod_for_each+0x29/0x3c [ 808.696842] [<c0591107>] __omap_hwmod_setup_all+0x17/0x2c [ 808.702696] [<c0008653>] do_one_initcall+0xc3/0x10c [ 808.708017] [<c058a627>] kernel_init_freeable+0xa7/0x134 [ 808.713778] [<c039a543>] kernel_init+0x7/0x98 [ 808.718544] [<c000cd95>] ret_from_fork+0x11/0x3c [ 808.723583] irq event stamp: 1379172 [ 808.727328] hardirqs last enabled at (1379172): [<c03a0759>] _raw_spin_unlock_irqrestore+0x21/0x30 [ 808.736828] hardirqs last disabled at (1379171): [<c03a03c3>] _raw_spin_lock_irqsave+0x13/0x38 [ 808.745876] softirqs last enabled at (1379164): [<c002ae5d>] irq_enter+0x49/0x4c [ 808.753747] softirqs last disabled at (1379165): [<c002aec3>] irq_exit+0x63/0x88 [ 808.761518] [ 808.761518] other info that might help us debug this: [ 808.768373] Possible unsafe locking scenario: [ 808.768373] [ 808.774578] CPU0 [ 808.777141] ---- [ 808.779705] lock(prepare_lock); [ 808.783186] <Interrupt> [ 808.785929] lock(prepare_lock); [ 808.789595] [ 808.789595] *** DEADLOCK *** [ 808.789595] [ 808.795805] 1 lock held by swapper/0: [ 808.799643] #0: (((&heartbeat_data->timer))){+.-...}, at: [<c002e204>] call_timer_fn+0x0/0x90 [ 808.808814] [ 808.808814] stack backtrace: [ 808.813402] [<c000ff19>] (unwind_backtrace+0x1/0x98) from [<c039bd75>] (print_usage_bug.part.25+0x16d/0x1cc) [ 808.823721] [<c039bd75>] (print_usage_bug.part.25+0x16d/0x1cc) from [<c004e595>] (mark_lock+0x18d/0x434) [ 808.833669] [<c004e595>] (mark_lock+0x18d/0x434) from [<c004ec1d>] (__lock_acquire+0x3e1/0x824) [ 808.842803] [<c004ec1d>] (__lock_acquire+0x3e1/0x824) from [<c004f359>] (lock_acquire+0x41/0x50) [ 808.852031] [<c004f359>] (lock_acquire+0x41/0x50) from [<c039ee9d>] (mutex_lock_nested+0x31/0x1d8) [ 808.861433] [<c039ee9d>] (mutex_lock_nested+0x31/0x1d8) from [<c027c211>] (clk_unprepare+0x15/0x24) [ 808.870930] [<c027c211>] (clk_unprepare+0x15/0x24) from [<c019f7bf>] (ehrpwm_pwm_disable+0x5f/0x80) [ 808.880431] [<c019f7bf>] (ehrpwm_pwm_disable+0x5f/0x80) from [<c019f29f>] (pwm_disable+0x27/0x28) [ 808.889751] [<c019f29f>] (pwm_disable+0x27/0x28) from [<c026f8f3>] (led_heartbeat_function+0x3f/0xb0) [ 808.899431] [<c026f8f3>] (led_heartbeat_function+0x3f/0xb0) from [<c002e249>] (call_timer_fn+0x45/0x90) [ 808.909288] [<c002e249>] (call_timer_fn+0x45/0x90) from [<c002e399>] (run_timer_softirq+0x105/0x17c) [ 808.918884] [<c002e399>] (run_timer_softirq+0x105/0x17c) from [<c002abc5>] (__do_softirq+0xa5/0x150) [ 808.928486] [<c002abc5>] (__do_softirq+0xa5/0x150) from [<c002aec3>] (irq_exit+0x63/0x88) [ 808.937098] [<c002aec3>] (irq_exit+0x63/0x88) from [<c000d599>] (handle_IRQ+0x21/0x54) [ 808.945415] [<c000d599>] (handle_IRQ+0x21/0x54) from [<c0008495>] (omap3_intc_handle_irq+0x5d/0x68) [ 808.954900] [<c0008495>] (omap3_intc_handle_irq+0x5d/0x68) from [<c000c7ff>] (__irq_svc+0x3f/0x64) [ 808.964287] Exception stack(0xc05b1f68 to 0xc05b1fb0) [ 808.969587] 1f60: 00000001 00000001 00000000 00000000 c05b0000 c0619748 [ 808.978158] 1f80: c05b0000 c05b0000 c0619748 413fc082 00000000 00000000 01000000 c05b1fb0 [ 808.986719] 1fa0: c004f989 c000d6f0 400f0033 ffffffff [ 808.992024] [<c000c7ff>] (__irq_svc+0x3f/0x64) from [<c000d6f0>] (cpu_idle+0x60/0x98) [ 809.000250] [<c000d6f0>] (cpu_idle+0x60/0x98) from [<c058a535>] (start_kernel+0x1e9/0x234) Remove non atomic clk api calls and use only atomic for enable/disable because can be called from atomic context (led_heartbeat_function is timer callback). Signed-off-by: Marek Belisko <marek.belisko@streamunlimited.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-26pwm: pca9685: Fix wrong argument to set MODE1_SLEEP bitAxel Lin
Current code actually does not set MODE1_SLEEP bit because the new value for bitmask (0x1) is wrong. To set MODE1_SLEEP bit, we should pass MODE1_SLEEP as the new value for bitmask. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-26pwm: renesas-tpu: Add MODULE_ALIAS to make module auto loading workAxel Lin
This driver can be built as module, add MODULE_ALIAS to make module auto loading work. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-25pwm: renesas-tpu: fix return value check in tpu_probe()Wei Yongjun
In case of error, the function devm_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Reviewed-by: Axel Lin <axel.lin@ingics.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-21pwm: Add Renesas TPU PWM driverLaurent Pinchart
The Timer Pulse Unit (TPU) is a 4-channels 16-bit timer used to generate waveforms. This driver exposes PWM functions through the PWM API for other drivers to use. The code is loosely based on the leds-renesas-tpu driver by Magnus Damm and the TPU PWM driver shipped in the Armadillo EVA 800 kernel sources. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Axel Lin <axel.lin@ingics.com> Tested-by: Simon Horman <horms@verge.net.au> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-21pwm: Add sysfs interfaceH Hartley Sweeten
Add a simple sysfs interface to the generic PWM framework. /sys/class/pwm/ `-- pwmchipN/ for each PWM chip |-- export (w/o) ask the kernel to export a PWM channel |-- npwm (r/o) number of PWM channels in this PWM chip |-- pwmX/ for each exported PWM channel | |-- duty_cycle (r/w) duty cycle (in nanoseconds) | |-- enable (r/w) enable/disable PWM | |-- period (r/w) period (in nanoseconds) | `-- polarity (r/w) polarity of PWM (normal/inversed) `-- unexport (w/o) return a PWM channel to the kernel Based on work by Lars Poeschel. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Lars Poeschel <poeschel@lemonage.de> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-12pwm: Fill in missing .owner fieldsThierry Reding
Some drivers don't set the .owner fields of the struct device_driver or struct pwm_ops, which causes the module usage count to become wrong. Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-12pwm: add pca9685 driverSteffen Trumtrar
Add pwm driver for the NXP pca9685 16 channel pwm-led controller. The driver is really barebones at this stage. E.g. the OE' pin and therefore the corresponding registers are not supported. The driver was tested on a HW where this pin is tied to GND. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> [thierry.reding@gmail.com: style and whitespace cleanups] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-12pwm: atmel-tcb: prepare clk before calling enableBoris BREZILLON
Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to avoid common clk framework warnings. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-06-10pwm: devm: alloc correct pointer sizeWolfram Sang
The allocated object should be the size of what the pointer is pointing to and not the size of the pointer itself. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-05-27pwm: mxs: Let device core handle pinctrlFabio Estevam
Since commit ab78029 (drivers/pinctrl: grab default handles from device core), we can rely on device core for handling pinctrl. So remove devm_pinctrl_get_select_default() from the driver. Cc: Thierry Reding <thierry.reding@avionic-design.de> Cc: <linux-kernel@vger.kernel.org> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2013-05-18drivers/pwm: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-04-23pwm: lpc32xx: Don't change PWM_ENABLE bit in lpc32xx_pwm_configAxel Lin
lpc32xx_pwm_config() is supposed to set duty_ns and period_ns, it should not change PWM_ENABLE bit. Signed-off-by: Axel Lin <axel.lin@ingics.com> Tested-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-23pwm: lpc32xx: Properly set PWM_ENABLE bit in lpc32xx_pwm_[enable|disable]Axel Lin
According to the LPC32x0 User Manual [1]: For both PWM1 and PWM2 Control Registers: BIT 31: This bit gates the PWM_CLK signal and enables the external output pin to the PWM_PIN_STATE logical level. 0 = PWM disabled. (Default) 1 = PWM enabled So in lpc32xx_pwm_enable(), we should set PWM_ENABLE bit. In lpc32xx_pwm_disable(), we should just clear PWM_ENABLE bit rather than write 0 to the register which will also clear PWMx_RELOADV and PWMx_DUTY bits. [1] http://www.nxp.com/documents/user_manual/UM10326.pdf Signed-off-by: Axel Lin <axel.lin@ingics.com> Tested-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-23pwm: Constify OF match tablesThierry Reding
A few drivers already annotate this properly. Make the same change for all other OF supporting drivers. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-04-02pwm: puv3: Remove unused enabled filed from struct puv3_pwm_chipAxel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: pxa: Remove PWM_ID_BASE macroAxel Lin
PWM_ID_BASE() is not used after convert to PWM framework, remove it. Also update driver_data field of struct platform_device_id accordingly. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: spear: Remove unused *dev from struct spear_pwm_chipAxel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Shiraz Hashim <shiraz.hashim@st.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: mxs: Remove unused *dev from struct mxs_pwm_chipAxel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: twl: Return proper error if twl6030_pwm_enable() failsAxel Lin
Return proper error instead of 0 if twl6030_pwm_enable() fails. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: pxa: Remove clk_enabled field from struct pxa_pwm_chipAxel Lin
clk_enable/clk_disable maintain an enable_count, clk_prepare and clk_unprepare also maintain a prepare_count. These APIs will do prepare/enable when the first user calling these APIs, and do disable/unprepare when the corresponding counter reach 0. Thus We don't need to maintain a clk_enabled counter here. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: imx: Remove enabled field from struct imx_chipAxel Lin
We can test PWMF_ENABLED bit to know if pwm is enabled or not. Thus remove enabled field from struct imx_chip. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: twl: Add .owner to struct pwm_opsAxel Lin
Add missing .owner of struct pwm_ops. This prevents the module from being removed from underneath its users. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: twl-led: Add .owner to struct pwm_opsAxel Lin
Add missing .owner of struct pwm_ops. This prevents the module from being removed from underneath its users. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: atmel-tcb: Add .owner to struct pwm_opsAxel Lin
Add missing .owner of struct pwm_ops. This prevents the module from being removed from underneath its users. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: ab8500: Add .owner to struct pwm_opsAxel Lin
Add missing .owner of struct pwm_ops. This prevents the module from being removed from underneath its users. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-04-02pwm: spear: Fix checking return value of clk_enable() and clk_prepare()Axel Lin
The logic to check return value of clk_enable() and clk_prepare() is reversed, fix it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Cc: stable@vger.kernel.org Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-26pwm: tiehrpwm: Staticize non-exported symbolsAxel Lin
Both ehrpwm_pwm_save_context() and ehrpwm_pwm_restore_context() are only used in this file, make them static. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-26pwm: tiecap: Staticize non-exported symbolsAxel Lin
Both ecap_pwm_save_context() and ecap_pwm_restore_context() are only used in this file, make them static. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-26pwm: ab8500: Fix trivial typo in dev_err messageAxel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-22pwm: davinci: Add Kconfig support for ECAP & EHRPWM devicesPhilip Avinash
Add EHRPWM and ECAP support build support for DAVINCI_DA8XX platforms. Also, since DAVINCI platforms doesn't support TI-PWM-Subsystem module, remove the select option for CONFIG_PWM_TIPWMSS. Also, update CONFIG_PWM_TIPWMSS compiler directive appropriately in pwm-tipwmss.h to fix the below compiler error upon removal of CONFIG_PWM_TIPWMSS for DAVINCI platforms. drivers/pwm/pwm-tiecap.c: In function 'ecap_pwm_probe': drivers/pwm/pwm-tiecap.c:263:4: error: 'PWMSS_ECAPCLK_EN' undeclared (first use in this function) drivers/pwm/pwm-tiecap.c:263:4: note: each undeclared identifier is reported only once for each function it appears in drivers/pwm/pwm-tiecap.c:264:17: error: 'PWMSS_ECAPCLK_EN_ACK' undeclared (first use in this function) drivers/pwm/pwm-tiecap.c: In function 'ecap_pwm_remove': drivers/pwm/pwm-tiecap.c:291:49: error: 'PWMSS_ECAPCLK_STOP_REQ' undeclared (first use in this function) make[2]: *** [drivers/pwm/pwm-tiecap.o] Error 1 make[1]: *** [drivers/pwm] Error 2 make: *** [drivers] Error 2 Signed-off-by: Philip Avinash <avinashphilip@ti.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-11pwm: pwm-tiehrpwm: add CONFIG_PM_SLEEP to suspend/resume functionsJingoo Han
This patch adds CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. drivers/pwm/pwm-tiehrpwm.c:562:12: warning: 'ehrpwm_pwm_suspend' defined but not used [-Wunused-function] drivers/pwm/pwm-tiehrpwm.c:580:12: warning: 'ehrpwm_pwm_resume' defined but not used [-Wunused-function Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-11pwm: pwm-tipwmss: add CONFIG_PM_SLEEP to suspend/resume functionsJingoo Han
This patch adds CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. drivers/pwm/pwm-tipwmss.c:104:12: warning: 'pwmss_suspend' defined but not used [-Wunused-function] drivers/pwm/pwm-tipwmss.c:113:12: warning: 'pwmss_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-11pwm: pwm-tiecap: add CONFIG_PM_SLEEP to suspend/resume functionsJingoo Han
This patch adds CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. drivers/pwm/pwm-tiecap.c:314:12: warning: 'ecap_pwm_suspend' defined but not used [-Wunused-function] drivers/pwm/pwm-tiecap.c:328:12: warning: 'ecap_pwm_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-08pwm: samsung: convert s3c_pwm to dev_pm_opsJingoo Han
Instead of using legacy suspend/resume methods, using newer dev_pm_ops structure allows better control over power management. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-03-08pwm: ab8500: use devm_kzalloc()Jingoo Han
Use devm_kzalloc() to make cleanup paths more simple. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2013-02-26Merge tag 'for-3.9-rc1' of git://gitorious.org/linux-pwm/linux-pwmLinus Torvalds
Pull PWM changes from Thierry Reding: "A new driver has been added to support the PWM mode of the timer counter blocks found on Atmel AT91 SoCs. The VT8500 driver now supports changing the PWM signal polarity and the TI drivers (EHRPWM and ECAP) gained suspend and resume functionality. User drivers can now query the core for whether access to a PWM device will sleep (if the PWM chip is on a slow bus such as I2C or SPI). The pwm-backlight driver now handles the backlight BL_CORE_FBBLANK state in addition to the FB layer's blanking states. To round things off, a few fixes and cleanups are also included" * tag 'for-3.9-rc1' of git://gitorious.org/linux-pwm/linux-pwm: pwm: twl: Use to_twl() instead of container_of() pwm: tegra: assume CONFIG_OF pwm_backlight: Validate dft_brightness in main probe function pwm: Export pwm_{set,get}_chip_data() pwm: Make Kconfig entries more consistent pwm: Add can_sleep property to drivers pwm: Add pwm_can_sleep() as exported API to users pwm-backlight: handle BL_CORE_FBBLANK state pwm: pwm-tiecap: Low power sleep support pwm: pwm-tiehrpwm: Low power sleep support pwm: pwm-tiehrpwm: Update the clock handling of pwm-tiehrpwm driver pwm: vt8500: Add polarity support pwm: vt8500: Register write busy test performed incorrectly pwm: atmel: add Timer Counter Block PWM driver
2013-02-26Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED subsystem update from Bryan Wu. * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (61 commits) leds: leds-sunfire: use dev_err()/pr_err() instead of printk() leds: 88pm860x: Add missing of_node_put() leds: tca6507: Use of_get_child_count() leds: leds-pwm: make it depend on PWM and not HAVE_PWM Documentation: leds: update LP55xx family devices leds-lp55xx: fix problem on removing LED attributes leds-lp5521/5523: add author and copyright description leds-lp5521/5523: use new lp55xx common header leds-lp55xx: clean up headers leds-lp55xx: clean up definitions leds-lp55xx: clean up unused data and functions leds-lp55xx: clean up _remove() leds-lp55xx: add new function for removing device attribtues leds-lp55xx: code refactoring on selftest function leds-lp55xx: use common device attribute driver function leds-lp55xx: support device specific attributes leds-lp5523: use generic firmware interface leds-lp5521: use generic firmware interface leds-lp55xx: support firmware interface leds-lp55xx: add new lp55xx_register_sysfs() for the firmware interface ...
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