pwm-beeper.txt

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    1 * PWM beeper device tree bindings
    2 
    3 Registers a PWM device as beeper.
    4 
    5 Required properties:
    6 - compatible: should be "pwm-beeper"
    7 - pwms: phandle to the physical PWM device
    8 
    9 Optional properties:
   10 - amp-supply: phandle to a regulator that acts as an amplifier for the beeper
   11 - beeper-hz:  bell frequency in Hz
   12 
   13 Example:
   14 
   15 beeper_amp: amplifier {
   16         compatible = "fixed-regulator";
   17         gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
   18 };
   19 
   20 beeper {
   21         compatible = "pwm-beeper";
   22         pwms = <&pwm0>;
   23         amp-supply = <&beeper_amp>;
   24 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/input/pwm-beeper.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/input/pwm-beeper.txt