[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_EXYNOS
	bool "Enable support for the Exynos PWM"
	depends on DM_PWM
	help
	  This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
	  supports a programmable period and duty cycle. A 32-bit counter is
	  used. It provides 5 channels which can be independently
	  programmed. Channel 4 (the last) is normally used as a timer.

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_SANDBOX
	bool "Enable support for the sandbox PWM"
	help
	  This is a sandbox PWM used for testing. It provides 3 channels and
	  records the settings passed into it, but otherwise does nothing
	  useful. The PWM can be enabled but is not connected to any outputs
	  so this is not very useful.

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	11
5c2dd4cd SG	12	config PWM_EXYNOS
	13	bool "Enable support for the Exynos PWM"
	14	depends on DM_PWM
	15	help
	16	This PWM is found on Samsung Exynos 5250 and other Samsung SoCs. It
	17	supports a programmable period and duty cycle. A 32-bit counter is
	18	used. It provides 5 channels which can be independently
	19	programmed. Channel 4 (the last) is normally used as a timer.
	20
0e23fd81 SG	21	config PWM_ROCKCHIP
	22	bool "Enable support for the Rockchip PWM"
	23	depends on DM_PWM
	24	help
	25	This PWM is found on RK3288 and other Rockchip SoCs. It supports a
	26	programmable period and duty cycle. A 32-bit counter is used.
	27	Various options provided in the hardware (such as capture mode and
	28	continuous/single-shot) are not supported by the driver.
41fa035c	29
43b41566 SG	30	config PWM_SANDBOX
	31	bool "Enable support for the sandbox PWM"
	32	help
	33	This is a sandbox PWM used for testing. It provides 3 channels and
	34	records the settings passed into it, but otherwise does nothing
	35	useful. The PWM can be enabled but is not connected to any outputs
	36	so this is not very useful.
	37
41fa035c SG	38	config PWM_TEGRA
41fa035c SG	39	bool "Enable support for the Tegra PWM"
91c08afe	40	depends on DM_PWM
41fa035c SG	41	help
	42	This PWM is found on Tegra 20 and other Nvidia SoCs. It supports
	43	four channels with a programmable period and duty cycle. Only a
	44	32KHz clock is supported by the driver but the duty cycle is
	45	configurable.