[people/ms/u-boot.git] / drivers / pwm / Kconfig

config DM_PWM
	bool "Enable support for pulse-width modulation devices (PWM)"
	depends on DM
	help
	  A pulse-width modulator emits a pulse of varying width and provides
	  control over the duty cycle (high and low time) of the signal. This
	  is often used to control a voltage level. The more time the PWM
	  spends in the 'high' state, the higher the voltage. The PWM's
	  frequency/period can be controlled along with the proportion of that
	  time that the signal is high.

config PWM_ROCKCHIP
	bool "Enable support for the Rockchip PWM"
	depends on DM_PWM
	help
	  This PWM is found on RK3288 and other Rockchip SoCs. It supports a
	  programmable period and duty cycle. A 32-bit counter is used.
	  Various options provided in the hardware (such as capture mode and
	  continuous/single-shot) are not supported by the driver.

config PWM_TEGRA
	bool "Enable support for the Tegra PWM"
	depends on DM_PWM
	help
	  This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
	  four channels with a programmable period and duty cycle. Only a
	  32KHz clock is supported by the driver but the duty cycle is
	  configurable.
Commit	Line	Data
fc760cb8 SG	1	config DM_PWM
	2	bool "Enable support for pulse-width modulation devices (PWM)"
	3	depends on DM
	4	help
	5	A pulse-width modulator emits a pulse of varying width and provides
	6	control over the duty cycle (high and low time) of the signal. This
	7	is often used to control a voltage level. The more time the PWM
	8	spends in the 'high' state, the higher the voltage. The PWM's
	9	frequency/period can be controlled along with the proportion of that
	10	time that the signal is high.
0e23fd81 SG	11
	12	config PWM_ROCKCHIP
	13	bool "Enable support for the Rockchip PWM"
	14	depends on DM_PWM
	15	help
	16	This PWM is found on RK3288 and other Rockchip SoCs. It supports a
	17	programmable period and duty cycle. A 32-bit counter is used.
	18	Various options provided in the hardware (such as capture mode and
	19	continuous/single-shot) are not supported by the driver.
41fa035c SG	20
	21	config PWM_TEGRA
	22	bool "Enable support for the Tegra PWM"
91c08afe	23	depends on DM_PWM
41fa035c SG	24	help
	25	This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
	26	four channels with a programmable period and duty cycle. Only a
	27	32KHz clock is supported by the driver but the duty cycle is
	28	configurable.