--- a/arch/arm/boot/dts/mt7629-rfb.dts
+++ b/arch/arm/boot/dts/mt7629-rfb.dts
@@ -18,6 +18,7 @@
 
 	chosen {
 		stdout-path = "serial0:115200n8";
+		bootargs = "earlycon=uart8250,mmio32,0x11002000 console=ttyS0,115200n8";
 	};
 
 	gpio-keys {
@@ -36,6 +37,13 @@
 		};
 	};
 
+	gsw: gsw@0 {
+		compatible = "mediatek,mt753x";
+		mediatek,ethsys = <&ethsys>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
 	memory@40000000 {
 		device_type = "memory";
 		reg = <0x40000000 0x10000000>;
@@ -70,6 +78,10 @@
 		compatible = "mediatek,eth-mac";
 		reg = <0>;
 		phy-mode = "2500base-x";
+
+		nvmem-cells = <&macaddr_factory_2a>;
+		nvmem-cell-names = "mac-address";
+
 		fixed-link {
 			speed = <2500>;
 			full-duplex;
@@ -82,6 +94,9 @@
 		reg = <1>;
 		phy-mode = "gmii";
 		phy-handle = <&phy0>;
+
+		nvmem-cells = <&macaddr_factory_24>;
+		nvmem-cell-names = "mac-address";
 	};
 
 	mdio: mdio-bus {
@@ -94,6 +109,26 @@
 	};
 };
 
+&gsw {
+	mediatek,mdio = <&mdio>;
+	mediatek,portmap = "llllw";
+	mediatek,mdio_master_pinmux = <0>;
+	reset-gpios = <&pio 28 0>;
+	interrupt-parent = <&pio>;
+	interrupts = <6 IRQ_TYPE_LEVEL_HIGH>;
+	status = "okay";
+
+	port6: port@6 {
+		compatible = "mediatek,mt753x-port";
+		reg = <6>;
+		phy-mode = "sgmii";
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+		};
+	};
+};
+
 &i2c {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c_pins>;
@@ -272,3 +307,17 @@
 	pinctrl-0 = <&watchdog_pins>;
 	status = "okay";
 };
+
+&factory {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_factory_24: macaddr@24 {
+		reg = <0x24 0x6>;
+	};
+
+	macaddr_factory_2a: macaddr@2a {
+		reg = <0x2a 0x6>;
+	};
+};