diff --git a/arch/arm/dts/ast2600-evb.dts b/arch/arm/dts/ast2600-evb.dts
index 05362d19bd..c17988ec3c 100644
--- a/arch/arm/dts/ast2600-evb.dts
+++ b/arch/arm/dts/ast2600-evb.dts
@@ -163,6 +163,74 @@
 	pinctrl-0 = <&pinctrl_i2c9_default>;
 };
 
+&mdio0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ethphy0: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ethphy1: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
+&mdio2 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ethphy2: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
+&mdio3 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	ethphy3: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
+&mac0 {
+	status = "okay";
+	phy-mode = "rgmii-rxid";
+	phy-handle = <&ethphy0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii1_default>;
+};
+
+&mac1 {
+	status = "okay";
+	phy-mode = "rgmii-rxid";
+	phy-handle = <&ethphy1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii2_default>;
+};
+
+&mac2 {
+	status = "okay";
+	phy-mode = "rgmii";
+	phy-handle = <&ethphy2>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii3_default>;
+};
+
+&mac3 {
+	status = "okay";
+	phy-mode = "rgmii";
+	phy-handle = <&ethphy3>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii4_default>;
+};
+
 &scu {
 	mac0-clk-delay = <0x1d 0x1c
 			  0x10 0x17
diff --git a/arch/arm/dts/ast2600.dtsi b/arch/arm/dts/ast2600.dtsi
index 31905fd208..98840ce7b0 100644
--- a/arch/arm/dts/ast2600.dtsi
+++ b/arch/arm/dts/ast2600.dtsi
@@ -210,11 +210,47 @@
 			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
-		mdio: ethernet@1e650000 {
-			compatible = "aspeed,aspeed-mdio";
-			reg = <0x1e650000 0x40>;
-			resets = <&rst ASPEED_RESET_MII>;
-			status = "disabled";
+		mdio: bus@1e650000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x1e650000 0x100>;
+
+			mdio0: mdio@0 {
+				compatible = "aspeed,ast2600-mdio";
+				reg = <0 0x8>;
+				resets = <&rst ASPEED_RESET_MII>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_mdio1_default>;
+				status = "disabled";
+			};
+
+			mdio1: mdio@8 {
+				compatible = "aspeed,ast2600-mdio";
+				reg = <0x8 0x8>;
+				resets = <&rst ASPEED_RESET_MII>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_mdio2_default>;
+				status = "disabled";
+			};
+
+			mdio2: mdio@10 {
+				compatible = "aspeed,ast2600-mdio";
+				reg = <0x10 0x8>;
+				resets = <&rst ASPEED_RESET_MII>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_mdio3_default>;
+				status = "disabled";
+			};
+
+			mdio3: mdio@18 {
+				compatible = "aspeed,ast2600-mdio";
+				reg = <0x18 0x8>;
+				resets = <&rst ASPEED_RESET_MII>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_mdio4_default>;
+				status = "disabled";
+			};
 		};
 
 		mac0: ftgmac@1e660000 {