diff --git a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
index 4d428f5ad044ba05ade0d5df9de6a5ff5e14c4c4..14a1f0b4c32b3fb6003b9d35acb6bd58d04744a5 100644
--- a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
@@ -131,6 +131,8 @@ examples:
                 reg = <4>;
                 ethernet = <&gmac2>;
                 label = "cpu";
+                phy-mode = "internal";
+
                 fixed-link {
                   speed = <1000>;
                   full-duplex;