ASoC: dt-bindings: Centralize the 'sound-dai' definition

'sound-dai' is a common property, but has duplicate type definitions.
Create a new common definition to define the type and then update all
the other occurrences to just define how many entries there are just
like other phandle+arg properties.

The constraints on the number of entries is based on the examples and
could be wrong.

Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220126231427.1638089-1-robh@kernel.org

Documentation/devicetree/bindings/sound/amlogic,gx-sound-card.yaml

@@ -57,7 +57,7 @@ patternProperties:
           rate
 
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
+        maxItems: 1
         description: phandle of the CPU DAI
 
     patternProperties:
@@ -71,7 +71,7 @@ patternProperties:
 
         properties:
           sound-dai:
-            $ref: /schemas/types.yaml#/definitions/phandle-array
+            maxItems: 1
             description: phandle of the codec DAI
 
         required:

Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml

@@ -62,13 +62,15 @@ patternProperties:
         description: Holds subnode which indicates cpu dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            maxItems: 1
 
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            maxItems: 1
 
     required:
       - link-name

Documentation/devicetree/bindings/sound/imx-audio-card.yaml

@@ -59,13 +59,16 @@ patternProperties:
         description: Holds subnode which indicates cpu dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            maxItems: 1
 
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            minItems: 1
+            maxItems: 2
 
       fsl,mclk-equal-bclk:
         description: Indicates mclk can be equal to bclk, especially for sai interface

Documentation/devicetree/bindings/sound/qcom,sm8250.yaml

@@ -69,19 +69,23 @@ patternProperties:
         description: Holds subnode which indicates cpu dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            maxItems: 1
 
       platform:
         description: Holds subnode which indicates platform dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            maxItems: 1
 
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
         properties:
-          sound-dai: true
+          sound-dai:
+            minItems: 1
+            maxItems: 4
 
     required:
       - link-name

Documentation/devicetree/bindings/sound/samsung,aries-wm8994.yaml

@@ -27,9 +27,6 @@ properties:
       sound-dai:
         minItems: 2
         maxItems: 2
-        items:
-          maxItems: 1
-        $ref: /schemas/types.yaml#/definitions/phandle-array
         description: |
           phandles to the I2S controller and bluetooth codec,
           in that order
@@ -38,7 +35,7 @@ properties:
     type: object
     properties:
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
+        maxItems: 1
         description: phandle to the WM8994 CODEC
 
   samsung,audio-routing:

Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml

@@ -21,7 +21,6 @@ properties:
     type: object
     properties:
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
         maxItems: 1
         description: phandle to the I2S controller
     required:
@@ -31,7 +30,6 @@ properties:
     type: object
     properties:
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
         maxItems: 1
         description: phandle to the WM1811 CODEC
     required:

Documentation/devicetree/bindings/sound/samsung,odroid.yaml

@@ -37,18 +37,15 @@ properties:
     type: object
     properties:
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
         description: phandles to the I2S controllers
 
   codec:
     type: object
     properties:
       sound-dai:
-        $ref: /schemas/types.yaml#/definitions/phandle-array
-        description: |
-          List of phandles to the CODEC nodes,
-          first entry must be corresponding to the MAX98090 CODEC and
-          the second entry must be the phandle of the HDMI IP block node.
+        items:
+          - description: phandle of the MAX98090 CODEC
+          - description: phandle of the HDMI IP block node
 
   samsung,audio-routing:
     $ref: /schemas/types.yaml#/definitions/non-unique-string-array

Documentation/devicetree/bindings/sound/sound-dai.yaml

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/sound-dai.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Digital Audio Interface consumer Device Tree Bindings
+
+maintainers:
+  - Rob Herring <robh@kernel.org>
+
+select: true
+
+properties:
+  sound-dai:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: A phandle plus args to digital audio interface provider(s)
+
+additionalProperties: true
+...