2 bool "Enable support for pulse-width modulation devices (PWM)"
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.
13 bool "Enable support for the Rockchip PWM"
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.
22 bool "Enable support for the Tegra PWM"
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