diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
index 6a47e08e0e97..081deb502e21 100644
--- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
@@ -27,11 +27,16 @@ properties:
     const: 0
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: PHY configuration clock
+      - description: Alternate PHY reference clock
 
   clock-names:
+    minItems: 1
     items:
       - const: phy
+      - const: alt
 
   power-domains:
     maxItems: 1