This patch series contains the fifth attempt at implementation of a generic PWM device interface framework. Think gpiolib, but for devices and pseudo-devices that generate pulse-wave-modulated outputs. Compared to the fourth revision of this patch series, the fifth revision: * Adds more 'const' keywords where appropriate * Removes mention of process IDs from the sysfs interface * Adds a 'pwm_set(period_ns, duty_ns, polarity)' function * Cleans up the Kconfig help text for the gpio+hrtimer device Functionally-speaking, this series has regressed somewhat from previous versions because I am currently focusing my attention on the API itself. I include only implementations for GPIO+hrtimer devices and the Atmel PWMC peripheral as references in this series; I will post patches for LED drivers, PXA, Samsung, etc. devices once I know that the API itself is on its way to mainline. (I believe that the two reference implementations sufficiently confirm the utility of the API itself). The code in this series is significantly clearer and more straightforward than previous versions. Thanks to everyone who helped me with this refactoring! I'm pretty convinced that the code you see here is at last suitable for pulling into mainline. Finally, the attached code CAN be used to control devices that drive stepper motors and the like, but doing so is discouraged as I am anticipating a request to develop an API specifically for such situations. Regards, b.g. Bill Gatliff (3): PWM: Implement a generic PWM framework PWM: GPIO+hrtimer device emulation PWM: Atmel PWMC driver Documentation/pwm.txt | 277 +++++++++++++++++++++ drivers/Kconfig | 2 + drivers/Makefile | 2 + drivers/pwm/Kconfig | 29 +++ drivers/pwm/Makefile | 7 + drivers/pwm/atmel-pwmc.c | 501 +++++++++++++++++++++++++++++++++++++ drivers/pwm/gpio-pwm.c | 348 ++++++++++++++++++++++++++ drivers/pwm/pwm.c | 611 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/pwm/pwm.h | 155 ++++++++++++ 9 files changed, 1932 insertions(+), 0 deletions(-) create mode 100644 Documentation/pwm.txt create mode 100644 drivers/pwm/Kconfig create mode 100644 drivers/pwm/Makefile create mode 100644 drivers/pwm/atmel-pwmc.c create mode 100644 drivers/pwm/gpio-pwm.c create mode 100644 drivers/pwm/pwm.c create mode 100644 include/linux/pwm/pwm.h -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
