ASoC: dt-bindings: cirrus,cs530x: Add initial DT binding

Add the YAML DT bindings for the cs530x high performance
audio ADCs.

Signed-off-by: Paul Handrigan <paulha@opensource.cirrus.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240621151757.1661265-2-paulha@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/cirrus,cs530x.yaml

@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/cirrus,cs530x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus Logic cs530x family of audio ADCs
+
+maintainers:
+  - Paul Handrigan <paulha@opensource.cirrus.com>
+  - patches@opensource.cirrus.com
+
+description:
+  The CS530X devices are a family of high performance audio ADCs.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - cirrus,cs5302
+      - cirrus,cs5304
+      - cirrus,cs5308
+
+  reg:
+    maxItems: 1
+
+  '#sound-dai-cells':
+    const: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  vdd-a-supply:
+    description: Analog power supply
+
+  vdd-io-supply:
+    description: Digital IO power supply
+
+  cirrus,in-hiz-pin12:
+    description:
+      Sets input channels one and two to high impedance.
+    type: boolean
+
+  cirrus,in-hiz-pin34:
+    description:
+      Sets input channels three and four to high impedance.
+    type: boolean
+
+  cirrus,in-hiz-pin56:
+    description:
+      Sets input channels five and six to high impedance.
+    type: boolean
+
+  cirrus,in-hiz-pin78:
+    description:
+      Sets input channels seven and eight to high impedance.
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        cs5304: adc@48 {
+            compatible = "cirrus,cs5304";
+            reg = <0x48>;
+            #sound-dai-cells = <1>;
+            reset-gpios = <&gpio 110 GPIO_ACTIVE_LOW>;
+            vdd-a-supply = <&vreg>;
+            vdd-io-supply = <&vreg>;
+            cirrus,in-hiz-pin34;
+        };
+    };