This adds an optional enable-gpios property to pwm-beeper. This gpio is used to enable the beeper. For example, the beeper may have an amplifier that needs to be switched on.
Signed-off-by: David Lechner <[email protected]> --- Documentation/devicetree/bindings/input/pwm-beeper.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.txt b/Documentation/devicetree/bindings/input/pwm-beeper.txt index be332ae..1c6bcf8 100644 --- a/Documentation/devicetree/bindings/input/pwm-beeper.txt +++ b/Documentation/devicetree/bindings/input/pwm-beeper.txt @@ -5,3 +5,14 @@ Registers a PWM device as beeper. Required properties: - compatible: should be "pwm-beeper" - pwms: phandle to the physical PWM device + +Optional properties: +- enable-gpios: phandle to gpio to enable the beeper + +Example: + +beeper { + compatible = "pwm-beeper"; + pwms = <&pwm0>; + enable-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>; +}; -- 2.7.4
