CS53L30 audio CODEC

Required properties:

  - compatible : "cirrus,cs53l30"

  - reg : the I2C address of the device

  - VA-supply, VP-supply : power supplies for the device,
    as covered in Documentation/devicetree/bindings/regulator/regulator.txt.

Optional properties:

  - reset-gpios : a GPIO spec for the reset pin.

  - mute-gpios : a GPIO spec for the MUTE pin. The active state can be either
		 GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW, which would be handled
		 by the driver automatically.

  - cirrus,micbias-lvl : Set the output voltage level on the MICBIAS Pin.
			 0 = Hi-Z
			 1 = 1.80 V
			 2 = 2.75 V

  - cirrus,use-sdout2 : This is a boolean property. If present, it indicates
			the hardware design connects both SDOUT1 and SDOUT2
			pins to output data. Otherwise, it indicates that
			only SDOUT1 is connected for data output.
			* CS53l30 supports 4-channel data output in the same
			* frame using two different ways:
			* 1) Normal I2S mode on two data pins -- each SDOUT
			*    carries 2-channel data in the same time.
			* 2) TDM mode on one single data pin -- SDOUT1 carries
			*    4-channel data per frame.

Example:

codec: cs53l30@48 {
	compatible = "cirrus,cs53l30";
	reg = <0x48>;
	reset-gpios = <&gpio 54 0>;
	VA-supply = <&cs53l30_va>;
	VP-supply = <&cs53l30_vp>;
};