diff --git a/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml b/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
index a0b8bf6cb110..cd95d7189d34 100644
--- a/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
+++ b/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
@@ -104,6 +104,7 @@ properties:
       - 4 # Use GPIO2 for jack-detect
       - 5 # Use GPIO3 for jack-detect
       - 6 # Use GPIO4 for jack-detect
+      - 7 # HDA?
 
   realtek,jack-detect-not-inverted:
     description: