ASoC: dt-bindings: Add FS2104/5S audio amplifiers

Add a DT schema for describing FourSemi FS2104/5S
audio amplifiers which support both I2S and I2C interface.

Signed-off-by: Nick Li <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/foursemi,fs2105s.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/foursemi,fs2105s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: FourSemi FS2104/5S Digital Audio Amplifier
+
+maintainers:
+  - Nick Li <[e-mail]>
+
+description:
+  The FS2104 is a 15W Inductor-Less, Stereo, Closed-Loop,
+  Digital Input Class-D Power Amplifier with Enhanced Signal Processing.
+  The FS2105S is a 30W Inductor-Less, Stereo, Closed-Loop,
+  Digital Input Class-D Power Amplifier with Enhanced Signal Processing.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - foursemi,fs2104
+          - const: foursemi,fs2105s
+      - enum:
+          - foursemi,fs2105s
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: The clock of I2S BCLK
+
+  clock-names:
+    items:
+      - const: bclk
+
+  interrupts:
+    maxItems: 1
+
+  '#sound-dai-cells':
+    const: 0
+
+  pvdd-supply:
+    description:
+      Regulator for power supply(PVDD in datasheet).
+
+  dvdd-supply:
+    description:
+      Regulator for digital supply(DVDD in datasheet).
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      It's the SDZ pin in datasheet, the pin is active low,
+      it will power down and reset the chip to shut down state.
+
+  firmware-name:
+    maxItems: 1
+    description: |
+      The firmware(*.bin) contains:
+      a. Register initialization settings
+      b. DSP effect parameters
+      c. Multi-scene sound effect configurations(optional)
+      It's gernerated by FourSemi's tuning tool.
+
+required:
+  - compatible
+  - reg
+  - '#sound-dai-cells'
+  - pvdd-supply
+  - dvdd-supply
+  - reset-gpios
+  - firmware-name
+
+allOf:
+  - $ref: dai-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        audio-codec@68 {
+            compatible = "foursemi,fs2105s";
+            reg = <0x68>;
+            clocks = <&clocks 18>;
+            clock-names = "bclk";
+            #sound-dai-cells = <0>;
+            pvdd-supply = <&pvdd_supply>;
+            dvdd-supply = <&dvdd_supply>;
+            reset-gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+            firmware-name = "fs2105s-btl-2p0-0s.bin";
+            pinctrl-names = "default";
+            pinctrl-0 = <&fs210x_pins_default>;
+        };
+    };