On Thu, 5 Aug 2021 at 22:28, [off-list ref] wrote:

+&mdio1 {
+       status = "okay";

You're enabling this but it looks like it's unused?

+};
+
+&mdio3 {
+       status = "okay";
+
+       ethphy1: ethernet-phy@13 {
+               compatible = "ethernet-phy-ieee802.3-c22";
+               reg = <0x0d>;
+       };
+};
+
+&mac3 {
+       status = "okay";
+       phy-mode = "rgmii";
+       phy-handle = <&ethphy1>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_rgmii4_default>;
+};