linux/Documentation/devicetree/bindings/sound/simple-amplifier.txt

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Simple Amplifier Audio Driver
Required properties:
- compatible : "dioo,dio2125" or "simple-audio-amplifier"
Optional properties:
- enable-gpios : the gpio connected to the enable pin of the simple amplifier
- VCC-supply : power supply for the device, as covered
in Documentation/devicetree/bindings/regulator/regulator.txt
Example:
amp: analog-amplifier {
compatible = "simple-audio-amplifier";
VCC-supply = <&regulator>;
enable-gpios = <&gpio GPIOH_3 0>;
};