ASoC: dt-bindings: awinic,aw88395: Add properties for multiple PA support

Add two properties, the "awinic,audio-channel" property and the
"awinic,sync-flag". The "awinic,audio-channel" is used to make
different PA load different configurations, the "awinic,sync-flag"
is used to synchronize the phases of multiple PA. These two properties
will be read by the corresponding driver, allowing multi-PA to
achieve better playback effect.

Signed-off-by: Weidong Wang <wangweidong.a@awinic.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230928105727.47273-2-wangweidong.a@awinic.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/awinic,aw88395.yaml

@@ -32,11 +32,25 @@ properties:
   reset-gpios:
     maxItems: 1
 
+  awinic,audio-channel:
+    description:
+      It is used to distinguish multiple PA devices, so that different
+      configurations can be loaded to different PA devices
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 7
+
+  awinic,sync-flag:
+    description:
+      Flag bit used to keep the phase synchronized in the case of multiple PA
+    $ref: /schemas/types.yaml#/definitions/flag
+
 required:
   - compatible
   - reg
   - '#sound-dai-cells'
   - reset-gpios
+  - awinic,audio-channel
 
 unevaluatedProperties: false
 
@@ -51,5 +65,7 @@ examples:
             reg = <0x34>;
             #sound-dai-cells = <0>;
             reset-gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+            awinic,audio-channel = <0>;
+            awinic,sync-flag;
         };
     };