diff --git a/Documentation/devicetree/bindings/sound/fsl,mqs.yaml b/Documentation/devicetree/bindings/sound/fsl,mqs.yaml
index d1ac84e518a0..1415247c92c8 100644
--- a/Documentation/devicetree/bindings/sound/fsl,mqs.yaml
+++ b/Documentation/devicetree/bindings/sound/fsl,mqs.yaml
@@ -52,6 +52,10 @@ properties:
   resets:
     maxItems: 1
 
+  port:
+    $ref: audio-graph-port.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - clocks