ARM: ARMADA XP: WRT1900AC: Add support for the Ethernet switch

Add a DSA section to the DT blob representing the Ethernet switch.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/boot/dts/armada-xp-linksys-mamba.dts

@@ -327,6 +327,51 @@ gpio_fan {
 		gpio-fan,speed-map = <0    0
 				      4500 1>;
 	};
+
+	dsa@0 {
+		compatible = "marvell,dsa";
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		dsa,ethernet = <&eth0>;
+		dsa,mii-bus = <&mdio>;
+
+		switch@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0 0>;	/* MDIO address 0, switch 0 in tree */
+
+			port@0 {
+				reg = <0>;
+				label = "lan4";
+			};
+
+			port@1 {
+				reg = <1>;
+				label = "lan3";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "lan2";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "lan1";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "internet";
+			};
+
+			port@5 {
+				reg = <5>;
+				label = "cpu";
+			};
+		};
+	};
 };
 
 &pinctrl {