mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 05:42:58 +00:00
91c08afe66
Use the driver-model PWM driver in preference to the old code. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Tom Warren <twarren@nvidia.com>
28 lines
1.1 KiB
Text
28 lines
1.1 KiB
Text
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.
|
|
|
|
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.
|