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- 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_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.
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