Analog Devices ADAU1977/ADAU1978/ADAU1979 Datasheets: https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1977.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1978.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1979.pdf This driver supports both the I2C and SPI bus. Required properties: - compatible: Should contain one of the following: "adi,adau1977" "adi,adau1978" "adi,adau1979" - AVDD-supply: analog power supply for the device, please consult Documentation/devicetree/bindings/regulator/regulator.txt Optional properties: - reset-gpios: the reset pin for the chip, for more details consult Documentation/devicetree/bindings/gpio/gpio.txt - DVDD-supply: supply voltage for the digital core, please consult Documentation/devicetree/bindings/regulator/regulator.txt - adi,micbias: configures the voltage setting for the MICBIAS pin. Select 0/1/2/3/4/5/6/7/8 to specify MICBIAS voltage 5V/5.5V/6V/6.5V/7V/7.5V/8V/8.5V/9V If not specified the default value will be "7" meaning 8.5 Volts. This property is only valid for the ADAU1977 For required properties on SPI, please consult Documentation/devicetree/bindings/spi/spi-bus.txt Required properties on I2C: - reg: The i2c address. Value depends on the state of ADDR0 and ADDR1, as wired in hardware. Examples: adau1977_spi: adau1977@0 { compatible = "adi,adau1977"; spi-max-frequency = <600000>; AVDD-supply = <®ulator>; DVDD-supply = <®ulator_digital>; adi,micbias = <3>; reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>; }; adau1977_i2c: adau1977@11 { compatible = "adi,adau1977"; reg = <0x11>; AVDD-supply = <®ulator>; DVDD-supply = <®ulator_digital>; reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>; };