xref: /freebsd/sys/contrib/device-tree/Bindings/sound/adi,adau1977.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71) 
1Analog Devices ADAU1977/ADAU1978/ADAU1979
2
3Datasheets:
4https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1977.pdf
5https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1978.pdf
6https://www.analog.com/media/en/technical-documentation/data-sheets/ADAU1979.pdf
7
8This driver supports both the I2C and SPI bus.
9
10Required 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
19Optional 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
32For required properties on SPI, please consult
33Documentation/devicetree/bindings/spi/spi-bus.txt
34
35Required properties on I2C:
36
37 - reg:         The i2c address. Value depends on the state of ADDR0
38                and ADDR1, as wired in hardware.
39
40Examples:
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	};
62