xref: /openbmc/u-boot/drivers/pwm/Kconfig (revision 4bb656e9)
1config 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.
11
12config 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.
20
21config PWM_TEGRA
22	bool "Enable support for the Tegra PWM"
23	depends on DM_PWM
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.
29