linux/Documentation/devicetree/bindings/sound/sgtl5000.txt

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* Freescale SGTL5000 Stereo Codec
Required properties:
- compatible : "fsl,sgtl5000".
- reg : the I2C address of the device
- clocks : the clock provider of SYS_MCLK
- micbias-resistor-k-ohms : the bias resistor to be used in kOmhs
The resistor can take values of 2k, 4k or 8k.
If set to 0 it will be off.
If this node is not mentioned or if the value is unknown, then
micbias resistor is set to 4K.
Example:
codec: sgtl5000@0a {
compatible = "fsl,sgtl5000";
reg = <0x0a>;
clocks = <&clks 150>;
sgtl5000-micbias-resistor = <1>;
};