| 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_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. |