diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
index 28660b931d0c..f5966b3a2d9a 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
+++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
@@ -171,6 +171,18 @@ properties:
       offer the power, Capability Mismatch is set. Required for power sink and
       power dual role.
 
+  accessory-mode-audio:
+    type: boolean
+    description: Whether the device supports Audio Adapter Accessory Mode. This
+      is only necessary if there are no other means to discover supported
+      alternative modes (e.g. through the UCSI firmware interface).
+
+  accessory-mode-debug:
+    type: boolean
+    description: Whether the device supports Debug Accessory Mode. This
+      is only necessary if there are no other means to discover supported
+      alternative modes (e.g. through the UCSI firmware interface).
+
   altmodes:
     type: object
     description: List of Alternative Modes supported by the schematics on the