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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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