menuconfig PWM bool "Pulse-Width Modulation (PWM) Support" depends on !MACH_JZ4740 && !PUV3_PWM help Generic Pulse-Width Modulation (PWM) support. In Pulse-Width Modulation, a variation of the width of pulses in a rectangular pulse signal is used as a means to alter the average power of the signal. Applications include efficient power delivery and voltage regulation. In computer systems, PWMs are commonly used to control fans or the brightness of display backlights. This framework provides a generic interface to PWM devices within the Linux kernel. On the driver side it provides an API to register and unregister a PWM chip, an abstraction of a PWM controller, that supports one or more PWM devices. Client drivers can request PWM devices and use the generic framework to configure as well as enable and disable them. This generic framework replaces the legacy PWM framework which allows only a single driver implementing the required API. Not all legacy implementations have been ported to the framework yet. The framework provides an API that is backward compatible with the legacy framework so that existing client drivers continue to work as expected. If unsure, say no. if PWM config PWM_BFIN tristate "Blackfin PWM support" depends on BFIN_GPTIMERS help Generic PWM framework driver for Blackfin. To compile this driver as a module, choose M here: the module will be called pwm-bfin. config PWM_IMX tristate "i.MX pwm support" depends on ARCH_MXC help Generic PWM framework driver for i.MX. To compile this driver as a module, choose M here: the module will be called pwm-imx. config PWM_LPC32XX tristate "LPC32XX PWM support" depends on ARCH_LPC32XX help Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two PWM controllers. To compile this driver as a module, choose M here: the module will be called pwm-lpc32xx. config PWM_MXS tristate "Freescale MXS PWM support" depends on ARCH_MXS && OF select STMP_DEVICE help Generic PWM framework driver for Freescale MXS. To compile this driver as a module, choose M here: the module will be called pwm-mxs. config PWM_PXA tristate "PXA PWM support" depends on ARCH_PXA help Generic PWM framework driver for PXA. To compile this driver as a module, choose M here: the module will be called pwm-pxa. config PWM_SAMSUNG tristate "Samsung pwm support" depends on PLAT_SAMSUNG help Generic PWM framework driver for Samsung. To compile this driver as a module, choose M here: the module will be called pwm-samsung. config PWM_TEGRA tristate "NVIDIA Tegra PWM support" depends on ARCH_TEGRA help Generic PWM framework driver for the PWFM controller found on NVIDIA Tegra SoCs. To compile this driver as a module, choose M here: the module will be called pwm-tegra. config PWM_TIECAP tristate "ECAP PWM support" depends on SOC_AM33XX help PWM driver support for the ECAP APWM controller found on AM33XX TI SOC To compile this driver as a module, choose M here: the module will be called pwm-tiecap. config PWM_TIEHRPWM tristate "EHRPWM PWM support" depends on SOC_AM33XX help PWM driver support for the EHRPWM controller found on AM33XX TI SOC To compile this driver as a module, choose M here: the module will be called pwm-tiehrpwm. config PWM_VT8500 tristate "vt8500 pwm support" depends on ARCH_VT8500 help Generic PWM framework driver for vt8500. To compile this driver as a module, choose M here: the module will be called pwm-vt8500. endif