diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
index 55a5aa7d7a54..ae9fb70d0212 100644
--- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
@@ -98,6 +98,10 @@ properties:
         - if a USB DRD channel: first clock should be host and second
           one should be peripheral
 
+  clock-names:
+    minItems: 1
+    maxItems: 4
+
   power-domains:
     maxItems: 1
 
@@ -186,6 +190,9 @@ allOf:
       required:
         - clocks
         - clock-names
+    else:
+      properties:
+        clock-names: false
 
 unevaluatedProperties: false