diff --git a/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts b/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
index ca39e1d681c1..4bf813335e21 100644
--- a/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
+++ b/arch/arm/boot/dts/r9a06g032-rzn1d400-db.dts
@@ -8,6 +8,9 @@
 
 /dts-v1/;
 
+#include <dt-bindings/pinctrl/rzn1-pinctrl.h>
+#include <dt-bindings/net/pcs-rzn1-miic.h>
+
 #include "r9a06g032.dtsi"
 
 / {
@@ -23,10 +26,122 @@ aliases {
 	};
 };
 
+&eth_miic {
+	status = "okay";
+	renesas,miic-switch-portin = <MIIC_GMAC2_PORT>;
+};
+
+&gmac2 {
+	status = "okay";
+	phy-mode = "gmii";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&mii_conv4 {
+	renesas,miic-input = <MIIC_SWITCH_PORTB>;
+	status = "okay";
+};
+
+&mii_conv5 {
+	renesas,miic-input = <MIIC_SWITCH_PORTA>;
+	status = "okay";
+};
+
+&pinctrl{
+	pins_eth3: pins_eth3 {
+		pinmux = <RZN1_PINMUX(36, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(37, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(38, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(39, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(40, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(41, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(42, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(43, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(44, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(45, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(46, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(47, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>;
+		drive-strength = <6>;
+		bias-disable;
+	};
+
+	pins_eth4: pins_eth4 {
+		pinmux = <RZN1_PINMUX(48, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(49, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(50, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(51, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(52, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(53, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(54, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(55, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(56, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(57, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(58, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>,
+			 <RZN1_PINMUX(59, RZN1_FUNC_CLK_ETH_MII_RGMII_RMII)>;
+		drive-strength = <6>;
+		bias-disable;
+	};
+
+	pins_mdio1: pins_mdio1 {
+		pinmux = <RZN1_PINMUX(152, RZN1_FUNC_MDIO1_SWITCH)>,
+			 <RZN1_PINMUX(153, RZN1_FUNC_MDIO1_SWITCH)>;
+	};
+};
+
 &rtc0 {
 	status = "okay";
 };
 
+&switch {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_eth3>, <&pins_eth4>, <&pins_mdio1>;
+
+	dsa,member = <0 0>;
+
+	mdio {
+		clock-frequency = <2500000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		switch0phy4: ethernet-phy@4 {
+			reg = <4>;
+			micrel,led-mode = <1>;
+		};
+
+		switch0phy5: ethernet-phy@5 {
+			reg = <5>;
+			micrel,led-mode = <1>;
+		};
+	};
+};
+
+&switch_port0 {
+	label = "lan0";
+	phy-mode = "mii";
+	phy-handle = <&switch0phy5>;
+	status = "okay";
+};
+
+&switch_port1 {
+	label = "lan1";
+	phy-mode = "mii";
+	phy-handle = <&switch0phy4>;
+	status = "okay";
+};
+
+&switch_port4 {
+	status = "okay";
+};
+
 &uart0 {
 	status = "okay";
 };