diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index efe4152e5846..19119a3f4f1e 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -1523,6 +1523,7 @@ dtb-$(CONFIG_MACH_ARMADA_370) += \
 dtb-$(CONFIG_MACH_ARMADA_375) += \
 	armada-375-db.dtb
 dtb-$(CONFIG_MACH_ARMADA_38X) += \
+	armada-380-iij-sa-w2.dtb \
 	armada-381-netgear-gs110emx.dtb \
 	armada-382-rd-ac3x-48g4x2xl.dtb \
 	armada-385-atl-x530.dtb\
diff --git a/arch/arm/boot/dts/armada-380-iij-sa-w2.dts b/arch/arm/boot/dts/armada-380-iij-sa-w2.dts
new file mode 100644
index 000000000000..beeecbb0f5f8
--- /dev/null
+++ b/arch/arm/boot/dts/armada-380-iij-sa-w2.dts
@@ -0,0 +1,391 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Device Tree file for Internet Initiative Japan Inc. SA-W2 Appliance
+ *
+ * Copyright (c) 2023, INAGAKI Hiroshi <musashino.open@gmail.com>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+#include "armada-380.dtsi"
+
+/ {
+	model = "IIJ SA-W2";
+	compatible = "iij,sa-w2", "marvell,armada380";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>; /* 256MB */
+	};
+
+	soc {
+		ranges = <MBUS_ID(0xf0, 0x01) 0 0xd0000000 0x100000
+			  MBUS_ID(0x01, 0x1d) 0 0xfff00000 0x100000
+			  MBUS_ID(0x09, 0x19) 0 0xf1100000 0x10000
+			  MBUS_ID(0x09, 0x15) 0 0xf1110000 0x10000
+			  MBUS_ID(0x0c, 0x04) 0 0xf1200000 0x100000>;
+
+		pcie {
+			status = "okay";
+
+			pcie@1,0 {
+				status = "okay";
+
+				/* Atheros AR9287 */
+				wifi@0,0 {
+					compatible = "pci168c,002e";
+					reg = <0000 0 0 0 0>;
+				};
+			};
+
+			pcie@3,0 {
+				status = "okay";
+
+				/* Qualcomm Atheros QCA9880 */
+				wifi@0,0 {
+					compatible = "qcom,ath10k";
+					reg = <0000 0 0 0 0>;
+				};
+			};
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmx_keys_pins>;
+
+		button-init {
+			label = "init";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmx_leds_pins>;
+
+		led-0 {
+			gpios = <&gpio0 19 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_WLAN;
+			function-enumerator = <1>;
+		};
+
+		led-1 {
+			gpios = <&gpio0 20 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_WLAN;
+			function-enumerator = <1>;
+		};
+
+		led-2 {
+			gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+		};
+
+		led-3 {
+			gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+		};
+
+		led-4 {
+			label = "green:mobile";
+			gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+		};
+
+		led-5 {
+			label = "red:mobile";
+			gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+		};
+
+		led-6 {
+			gpios = <&gpio1 12 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_WLAN;
+			function-enumerator = <0>;
+		};
+
+		led-7 {
+			gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_WLAN;
+			function-enumerator = <0>;
+		};
+
+		led-8 {
+			gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_POWER;
+		};
+
+		led-9 {
+			gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_POWER;
+		};
+
+		led-10 {
+			gpios = <&gpio1 22 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_USB;
+			function-enumerator = <1>;
+			linux,default-trigger = "usbport";
+			trigger-sources = <&hub_port2>;
+		};
+
+		led-11 {
+			gpios = <&gpio1 23 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_USB;
+			function-enumerator = <0>;
+			linux,default-trigger = "usbport";
+			trigger-sources = <&hub_port1>;
+		};
+	};
+
+	regulator-vbus-usb0 {
+		compatible = "regulator-fixed";
+		regulator-name = "vbus-usb0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio1 20 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+
+	regulator-vbus-usb1 {
+		compatible = "regulator-fixed";
+		regulator-name = "vbus-usb1";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio1 21 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pins>;
+	status = "okay";
+};
+
+&pinctrl {
+	pmx_usb_pins: usb-pins {
+		marvell,pins = "mpp2",		 /* smsc usb2514b reset */
+			       "mpp48", "mpp49", /* port over current */
+			       "mpp52", "mpp53"; /* port vbus */
+		marvell,function = "gpio";
+	};
+
+	pmx_keys_pins: keys-pins {
+		marvell,pins = "mpp18";
+		marvell,function = "gpio";
+	};
+
+	pmx_leds_pins: leds-pins {
+		marvell,pins = "mpp19", "mpp20", "mpp33", "mpp34", "mpp35",
+			       "mpp36", "mpp44", "mpp45", "mpp46", "mpp47",
+			       "mpp54", "mpp55";
+		marvell,function = "gpio";
+	};
+};
+
+&gpio0 {
+	usb-hub-reset {
+		gpio-hog;
+		gpios = <2 GPIO_ACTIVE_HIGH>;
+		output-high;
+	};
+};
+
+&usb0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pmx_usb_pins>;
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/* SMSC USB2514B */
+	hub@1 {
+		compatible = "usb424,2514";
+		reg = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hub_port1: port@1 {
+			reg = <1>;
+			#trigger-source-cells = <0>;
+		};
+
+		hub_port2: port@2 {
+			reg = <2>;
+			#trigger-source-cells = <0>;
+		};
+	};
+};
+
+&bm {
+	status = "okay";
+};
+
+&bm_bppi {
+	status = "okay";
+};
+
+&eth1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ge1_rgmii_pins>;
+	status = "okay";
+
+	phy-connection-type = "rgmii";
+	buffer-manager = <&bm>;
+	bm,pool-long = <2>;
+	bm,pool-short = <3>;
+
+	nvmem-cells = <&macaddr_bdinfo_6>;
+	nvmem-cell-names = "mac-address";
+	mac-address-increment = <1>;
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+};
+
+&mdio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mdio_pins>;
+	status = "okay";
+
+	/* Marvell 88E6172 */
+	switch@0 {
+		compatible = "marvell,mv88e6085";
+		reg = <0x0>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <10 IRQ_TYPE_LEVEL_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				label = "ge1_0";
+			};
+
+			port@1 {
+				reg = <1>;
+				label = "ge1_1";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "ge1_2";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "ge1_3";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "ge0";
+				nvmem-cells = <&macaddr_bdinfo_6>;
+				nvmem-cell-names = "mac-address";
+			};
+
+			/*
+			 * eth0 is connected to port5 for WAN connection
+			 * on port4 ("GE0")
+			 */
+
+			port@6 {
+				reg = <6>;
+				label = "cpu";
+				ethernet = <&eth1>;
+				phy-connection-type = "rgmii-id";
+
+				fixed-link {
+					speed = <1000>;
+					full-duplex;
+				};
+			};
+		};
+	};
+};
+
+&rtc {
+	status = "disabled";
+};
+
+&spi1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi1_pins>;
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x100000>;
+				label = "bootloader";
+				read-only;
+			};
+
+			partition@100000 {
+				reg = <0x100000 0x10000>;
+				label = "bootloader-env";
+				read-only;
+			};
+
+			partition@110000 {
+				compatible = "nvmem-cells";
+				reg = <0x110000 0xf0000>;
+				label = "board-info";
+				read-only;
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				macaddr_bdinfo_6: macaddr@6 {
+					reg = <0x6 0x6>;
+				};
+			};
+
+			partition@200000 {
+				reg = <0x200000 0xf00000>;
+				label = "firmware";
+			};
+
+			partition@1100000 {
+				reg = <0x1100000 0xf00000>;
+				label = "rescue";
+				read-only;
+			};
+		};
+	};
+};
