linuxdebug/Documentation/devicetree/bindings/sound/nau8315.txt

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Nuvoton NAU8315 Mono Class-D Amplifier
Required properties:
- compatible : "nuvoton,nau8315"
Optional properties:
- enable-gpios : GPIO specifier for the chip's device enable input(EN) pin.
If this option is not specified then driver does not manage
the pin state (e.g. chip is always on).
Example:
#include <dt-bindings/gpio/gpio.h>
nau8315 {
compatible = "nuvoton,nau8315";
enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
};