BMC/Intel-BMC/linux.git/drivers/pwm/Kconfig, branch dev

pwm: Imagination Technologies PWM DAC driver

2015-01-30T11:16:04+00:00

The Pistachio SOC from Imagination Technologies includes a Pulse Width Modulation DAC which produces 1 to 4 digital bit-outputs which represent digital waveforms. These PWM outputs are primarily in charge of controlling backlight LED devices. Reviewed-by: Andrew Bresticker Signed-off-by: Naidu Tellapati Signed-off-by: Sai Masarapu Signed-off-by: Ezequiel Garcia Reviewed-by: Vladimir Zapolskiy [thierry.reding: fixup license header as discussed on list] Signed-off-by: Thierry Reding

pwm: Add Allwinner SoC support

2015-01-30T11:16:01+00:00

This adds a generic PWM framework driver for the PWM controller found on Allwinner SoCs. Signed-off-by: Alexandre Belloni Acked-by: Maxime Ripard Signed-off-by: Thierry Reding

pwm: atmel-hlcdc: Depend on HAVE_CLK

2015-01-30T11:15:58+00:00

The include/linux/clk.h header defines dummy implementations for the various clk_*() functions if HAVE_CLK is not selected to improve build coverage in randconfig builds. The dummy implementation of clk_get_rate() returns 0, which causes the Atmel HLCDC PWM driver's atmel_hlcdc_pwm_config() implementation to end up calling: do_div(clk_period_ns, 0) On x86, do_div(n, base) will end up evaluating to this: n >>= ilog2(base) with base = 0, the implementation of ilog2() will call ____ilog2_NaN(), which is purposely undefined and results in a linker failure: ERROR: "____ilog2_NaN" [drivers/pwm/pwm-atmel-hlcdc.ko] undefined! The implementation of do_div() checks that base is a power of 2 before calling ilog2(). The compiler doesn't optimize this away, presumably because is_power_of_2() is an inline function and the compiler doesn't or can't inspect it closely enough. ilog2() being a macro it still ends up generating the ____ilog2_NaN() because of the constant 0. The root of the problem is that the driver really should be checking before possibly dividing by zero. That should eventually be fixed, but for now just assume that the clock runs at a sensible frequency when available. Reported-by: Jim Davis Acked-by: Boris Brezillon Signed-off-by: Thierry Reding

pwm: samsung: Allow Samsung PWM driver to be enabled on Exynos7

2014-11-17T11:24:17+00:00

To re-use the existing PWM driver for 64-bit ARM based Exynos7 SoC, make the driver depend on ARCH_EXYNOS along with PLAT_SAMSUNG. Signed-off-by: Abhilash Kesavan Signed-off-by: Thierry Reding

pwm: add support for atmel-hlcdc-pwm device

2014-11-17T11:20:17+00:00

The HLCDC IP available in some Atmel SoCs (i.e. at91sam9x5, at91sam9n12 or sama5d3 families for instance) provides a PWM device. This driver add support for a PWM chip exposing a single PWM device (which will most likely be used to drive a backlight device). Signed-off-by: Boris Brezillon Tested-by: Anthony Harivel Tested-by: Ludovic Desroches Acked-by: Thierry Reding Acked-by: Nicolas Ferre Signed-off-by: Thierry Reding

pwm: Add BCM2835 PWM driver

2014-11-17T11:20:13+00:00

Add PWM driver for Broadcom BCM2835 processor (Raspberry Pi) Signed-off-by: Bart Tanghe Acked-by: Stephen Warren Signed-off-by: Thierry Reding

pwm: Let PWM_CLPS711X depend on HAS_IOMEM

2014-10-20T07:39:44+00:00

PWM_CLPS711X needs HAS_IOMEM, so depend on it, the related error (with allmodconfig under um): MODPOST 1205 modules ERROR: "devm_ioremap_resource" [drivers/pwm/pwm-clps711x.ko] undefined! ERROR: "devm_ioremap" [drivers/net/phy/mdio-bcm-unimac.ko] undefined! Signed-off-by: Chen Gang Signed-off-by: Thierry Reding

pwm: lpss: make it buildable only on X86

2014-08-25T09:46:37+00:00

There is no sign of this IP block on non-x86 architectures and rather will not be. Thus, make this explicit by applying a direct dependency to X86. Signed-off-by: Andy Shevchenko Signed-off-by: Thierry Reding

pwm: lpss: Properly split driver to parts

2014-08-22T22:25:47+00:00

The driver consists of core, PCI, and platform parts. It would be better to split them into separate files. The platform driver is now called pwm-lpss-platform. Thus, previously set CONFIG_PWM_LPSS=m is not enough to build it. But we are on the safe side since it seems no one from outside Intel is using it for now. While here, move to use macros module_pci_driver() and module_platform_driver(). Signed-off-by: Andy Shevchenko Reviewed-by: Mika Westerberg Acked-by: Alan Cox [thierry.reding: change select to depends on PWM_LPSS, cleanup] Signed-off-by: Thierry Reding

pwm: fsl-ftm: Select REGMAP_MMIO

2014-08-22T08:17:01+00:00

Commit 42fa98a9c360 ("pwm: fsl-ftm: Convert to direct regmap API usage") introduced the following error when REGMAP_MMIO=n: drivers/built-in.o: In function `fsl_pwm_probe': >> pwm-fsl-ftm.c:(.text+0xd7d7): undefined reference to `devm_regmap_init_mmio_clk' Select select REGMAP_MMIO in order to fix this error. Reported-by: kbuild test robot Signed-off-by: Fabio Estevam Signed-off-by: Thierry Reding