ASoC: adau1977: convert text binding to yaml format

This change converts the old device-tree binding for ADAU1977 from text
format to the new yaml format.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201110084754.46756-1-alexandru.ardelean@analog.comSigned-off-by: Mark Brown <broonie@kernel.org>

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

-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 = <&regulator>;
-		DVDD-supply = <&regulator_digital>;
-
-		adi,micbias = <3>;
-		reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
-	};
-
-	adau1977_i2c: adau1977@11 {
-		compatible = "adi,adau1977";
-		reg = <0x11>;
-
-		AVDD-supply = <&regulator>;
-		DVDD-supply = <&regulator_digital>;
-
-		reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
-	};

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

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/adi,adau1977.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADAU1977/ADAU1978/ADAU1979 Quad ADC with Diagnostics
+
+maintainers:
+  - Lars-Peter Clausen <lars@metafoo.de>
+  - Bogdan Togorean <bogdan.togorean@analog.com>
+
+description: |
+  Analog Devices ADAU1977 and similar quad ADC with Diagnostics
+  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
+
+properties:
+  compatible:
+    enum:
+      - adi,adau1977
+      - adi,adau1978
+      - adi,adau1979
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  reset-gpios:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+  AVDD-supply:
+    description: Analog power support for the device.
+
+  DVDD-supply:
+    description: Supply voltage for digital core.
+
+  adi,micbias:
+    description: |
+      Configures the voltage setting for the MICBIAS pin.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    default: 7
+
+required:
+  - reg
+  - compatible
+  - AVDD-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adau1977_spi: adau1977@0 {
+            compatible = "adi,adau1977";
+            reg = <0>;
+            spi-max-frequency = <600000>;
+
+            AVDD-supply = <&regulator>;
+            DVDD-supply = <&regulator_digital>;
+
+            reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+
+            adi,micbias = <3>;
+        };
+    };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        adau1977_i2c: adau1977@11 {
+            compatible = "adi,adau1977";
+            reg = <0x11>;
+
+            AVDD-supply = <&regulator>;
+            DVDD-supply = <&regulator_digital>;
+
+            reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+        };
+    };