linux-sg2042/Documentation/devicetree/bindings/sound/sun50i-codec-analog.txt

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* Allwinner A64 Codec Analog Controls
Required properties:
- compatible: must be one of the following compatibles:
- "allwinner,sun50i-a64-codec-analog"
- reg: must contain the registers location and length
- cpvdd-supply: Regulator supply for the headphone amplifier
Example:
codec_analog: codec-analog@1f015c0 {
compatible = "allwinner,sun50i-a64-codec-analog";
reg = <0x01f015c0 0x4>;
cpvdd-supply = <&reg_eldo1>;
};