linux-arkmicro/linux/Documentation/devicetree/bindings/sound/nau8540.txt

NAU85L40 audio CODEC

This device supports I2C only.

Required properties:

  - compatible : "nuvoton,nau8540"

  - reg : the I2C address of the device.

Example:

codec: nau8540@1c {
       compatible = "nuvoton,nau8540";
       reg = <0x1c>;
};