Documentation/devicetree/bindings/sound/adi,adau1977.txt

   1 Analog Devices ADAU1977/ADAU1978/ADAU1979
   2
   3 Datasheets:
   4 http://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1977.pdf
   5 http://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1978.pdf
   6 http://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1979.pdf
   7
   8 This driver supports both the I2C and SPI bus.
   9
  10 Required properties:
  11  - compatible: Should contain one of the following:
  12                "adi,adau1977"
  13                "adi,adau1978"
  14                "adi,adau1979"
  15
  16  - AVDD-supply: analog power supply for the device, please consult
  17                 Documentation/devicetree/bindings/regulator/regulator.txt
  18
  19 Optional properties:
  20  - reset-gpios: the reset pin for the chip, for more details consult
  21                 Documentation/devicetree/bindings/gpio/gpio.txt
  22
  23  - DVDD-supply: supply voltage for the digital core, please consult
  24                 Documentation/devicetree/bindings/regulator/regulator.txt
  25
  26 - adi,micbias: configures the voltage setting for the MICBIAS pin.
  27                 Select 0/1/2/3/4/5/6/7/8 to specify MICBIAS voltage
  28                 5V/5.5V/6V/6.5V/7V/7.5V/8V/8.5V/9V
  29                 If not specified the default value will be "7" meaning 8.5 Volts.
  30                 This property is only valid for the ADAU1977
  31
  32 For required properties on SPI, please consult
  33 Documentation/devicetree/bindings/spi/spi-bus.txt
  34
  35 Required properties on I2C:
  36
  37  - reg:         The i2c address. Value depends on the state of ADDR0
  38                 and ADDR1, as wired in hardware.
  39
  40 Examples:
  41
  42         adau1977_spi: adau1977@0 {
  43                 compatible = "adi,adau1977";
  44                 spi-max-frequency = <600000>;
  45
  46                 AVDD-supply = <&regulator>;
  47                 DVDD-supply = <&regulator_digital>;
  48
  49                 adi,micbias = <3>;
  50                 reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
  51         };
  52
  53         adau1977_i2c: adau1977@11 {
  54                 compatible = "adi,adau1977";
  55                 reg = <0x11>;
  56
  57                 AVDD-supply = <&regulator>;
  58                 DVDD-supply = <&regulator_digital>;
  59
  60                 reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
  61         };