diff --git a/Documentation/devicetree/bindings/sound/sgtl5000.yaml b/Documentation/devicetree/bindings/sound/sgtl5000.yaml
index 70b4a8831073..e762c320b574 100644
--- a/Documentation/devicetree/bindings/sound/sgtl5000.yaml
+++ b/Documentation/devicetree/bindings/sound/sgtl5000.yaml
@@ -75,6 +75,10 @@ properties:
     $ref: "/schemas/types.yaml#/definitions/uint32"
     enum: [ 0, 1, 2, 3 ]
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - reg