ASoC: dt-bindings: realtek,rt5575: add support for ALC5575

Audio codec with I2S, I2C and SPI.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/cad38383a8f4c7235158779c270fee7f61bf6cfe.1767148150.git.oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/realtek,rt5575.yaml

@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/realtek,rt5575.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ALC5575 audio CODEC
+
+maintainers:
+  - Oder Chiou <oder_chiou@realtek.com>
+
+description:
+  The device supports both I2C and SPI. I2C is mandatory, while SPI is
+  optional depending on the hardware configuration. SPI is used for
+  firmware loading if present.
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: realtek,rt5575
+
+  reg:
+    maxItems: 1
+
+  spi-parent:
+    description:
+      Optional phandle reference to the SPI controller used for firmware
+      loading. The argument specifies the chip select.
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  # I2C-only node
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@57 {
+            compatible = "realtek,rt5575";
+            reg = <0x57>;
+        };
+    };
+
+  # I2C + optional SPI node
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@57 {
+            compatible = "realtek,rt5575";
+            reg = <0x57>;
+            spi-parent = <&spi0 0>; /* chip-select 0 */
+        };
+    };