| Message ID | 20180328170327.5395-2-enric.balletbo@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, 28 Mar 2018, Enric Balletbo i Serra wrote: > Hardware needs a delay between setting an initial (non-zero) PWM and > enabling the backlight using GPIO. The post-pwm-on-delay-ms specifies > this delay in milli seconds. Hardware also needs a delay between disabing > the backlight using GPIO and setting PWM value to 0. The pwm-off-delay-ms > is this delay in milli seconds. > > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > Acked-by: Pavel Machek <pavel@ucw.cz> > Acked-by: Thierry Reding <thierry.reding@gmail.com> > Acked-by: Daniel Thompson <daniel.thompson@linaro.org> > Reviewed-by: Rob Herring <robh@kernel.org> > --- > Based on the original Huang Lin <hl@rock-chips.com> work. > Changes since v5: > - Add Acked-by: Thierry Reding <thierry.reding@gmail.com> > - CC DT mainling list (for some reason dropped at some point, my > fault) > Changes since v4: > - Rebase on top of mainline. > Changes since v3: > - Replace us for ms. > - Add Acked-by: Pavel Machek <pavel@ucw.cz> > Changes since v2: > - Use separate properties (Rob Herring) > Changes since v1: > - As suggested by Daniel Thompson > - Do not assume power-on delay and power-off delay will be the same > --- > Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt | 6 ++++++ > 1 file changed, 6 insertions(+) Applied, thanks.
diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt index 764db86d441a..310810906613 100644 --- a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt +++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt @@ -17,6 +17,10 @@ Optional properties: "pwms" property (see PWM binding[0]) - enable-gpios: contains a single GPIO specifier for the GPIO which enables and disables the backlight (see GPIO binding[1]) + - post-pwm-on-delay-ms: Delay in ms between setting an initial (non-zero) PWM + and enabling the backlight using GPIO. + - pwm-off-delay-ms: Delay in ms between disabling the backlight using GPIO + and setting PWM value to 0. [0]: Documentation/devicetree/bindings/pwm/pwm.txt [1]: Documentation/devicetree/bindings/gpio/gpio.txt @@ -32,4 +36,6 @@ Example: power-supply = <&vdd_bl_reg>; enable-gpios = <&gpio 58 0>; + post-pwm-on-delay-ms = <10>; + pwm-off-delay-ms = <10>; };