diff --git a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
index 9f68142c9ae3..43e7f86e3b23 100644
--- a/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
+++ b/Documentation/devicetree/bindings/sound/audio-graph-port.yaml
@@ -11,9 +11,10 @@ maintainers:
 
 select: false
 
+allOf:
+  - $ref: /schemas/graph.yaml#/$defs/port-base
+
 properties:
-  reg:
-    maxItems: 1
   prefix:
     description: "device name prefix"
     $ref: /schemas/types.yaml#/definitions/string
@@ -25,10 +26,8 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
 patternProperties:
   "^endpoint(@[0-9a-f]+)?":
-    type: object
+    $ref: /schemas/graph.yaml#/$defs/endpoint-base
     properties:
-      remote-endpoint:
-        maxItems: 1
       mclk-fs:
         description: |
           Multiplication factor between stream rate and codec mclk.