diff --git a/target/linux/realtek/dts-5.10/rtl839x.dtsi b/target/linux/realtek/dts-5.10/rtl839x.dtsi
new file mode 100644
index 0000000000..19da1c11cb
--- /dev/null
+++ b/target/linux/realtek/dts-5.10/rtl839x.dtsi
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+
+#define STRINGIZE(s) #s
+#define LAN_LABEL(p, s) STRINGIZE(p ## s)
+#define SWITCH_PORT_LABEL(n) LAN_LABEL(lan, n)
+
+#define INTERNAL_PHY(n) \
+	phy##n: ethernet-phy@##n { \
+		reg = <##n>; \
+		compatible = "ethernet-phy-ieee802.3-c22"; \
+		phy-is-integrated; \
+	};
+
+#define EXTERNAL_PHY(n) \
+	phy##n: ethernet-phy@##n { \
+		reg = <##n>; \
+		compatible = "ethernet-phy-ieee802.3-c22"; \
+	};
+
+#define EXTERNAL_SFP_PHY(n) \
+	phy##n: ethernet-phy@##n { \
+		compatible = "ethernet-phy-ieee802.3-c22"; \
+		sfp; \
+		media = "fibre"; \
+		reg = <##n>; \
+	};
+
+#define SWITCH_PORT(n, s, m) \
+	port@##n { \
+		reg = <##n>; \
+		label = SWITCH_PORT_LABEL(s) ; \
+		phy-handle = <&phy##n>; \
+		phy-mode = #m ; \
+	};
+
+#define SWITCH_SFP_PORT(n, s, m) \
+	port@##n { \
+		reg = <##n>; \
+		label = SWITCH_PORT_LABEL(s) ; \
+		phy-handle = <&phy##n>; \
+		phy-mode = #m ; \
+		fixed-link { \
+			speed = <1000>; \
+			full-duplex; \
+		}; \
+	};
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	compatible = "realtek,rtl839x-soc";
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		frequency = <700000000>;
+
+		cpu@0 {
+			compatible = "mips,mips34Kc";
+			reg = <0>;
+		};
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,38400";
+	};
+
+	lx_clk: lx_clk {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <200000000>;
+	};
+
+	cpuintc: cpuintc {
+		compatible = "mti,cpu-interrupt-controller";
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		interrupt-controller;
+	};
+
+	soc: soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x18000000 0x10000>;
+
+		intc: interrupt-controller@3000 {
+			compatible = "realtek,rtl8390-intc", "realtek,rtl-intc";
+			reg = <0x3000 0x18>, <0x3018 0x18>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			interrupt-parent = <&cpuintc>;
+			interrupts = <2>, <3>, <4>, <5>, <6>;
+		};
+
+		spi0: spi@1200 {
+			compatible = "realtek,rtl8380-spi";
+			reg = <0x1200 0x100>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		uart0: uart@2000 {
+			compatible = "ns16550a";
+			reg = <0x2000 0x100>;
+
+			clocks = <&lx_clk>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <31 1>;
+
+			reg-io-width = <1>;
+			reg-shift = <2>;
+			fifo-size = <1>;
+			no-loopback-test;
+		};
+
+		uart1: uart@2100 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&enable_uart1>;
+
+			compatible = "ns16550a";
+			reg = <0x2100 0x100>;
+
+			clocks = <&lx_clk>;
+
+			interrupt-parent = <&intc>;
+			interrupts = <30 2>;
+
+			reg-io-width = <1>;
+			reg-shift = <2>;
+			fifo-size = <1>;
+			no-loopback-test;
+
+			status = "disabled";
+		};
+
+		gpio0: gpio-controller@b3500 {
+			compatible = "realtek,rtl8390-gpio", "realtek,otto-gpio";
+			reg = <0x3500 0x20>;
+
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <24>;
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+			interrupt-parent = <&intc>;
+			interrupts = <23 2>;
+		};
+
+		watchdog0: watchdog@3150 {
+			compatible = "realtek,rtl8390-wdt";
+			reg = <0x3150 0xc>;
+
+			realtek,reset-mode = "soc";
+
+			clocks = <&lx_clk>;
+			timeout-sec = <30>;
+
+			interrupt-parent = <&intc>;
+			interrupt-names = "phase1", "phase2";
+			interrupts = <19 4>, <18 4>;
+		};
+
+	};
+
+	pinmux: pinmux@1b001000 {
+		compatible = "pinctrl-single";
+		reg = <0x1b000004 0x4>;
+
+		pinctrl-single,bit-per-mux;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0x1>;
+		#pinctrl-cells = <2>;
+
+		enable_uart1: pinmux_enable_uart1 {
+			pinctrl-single,bits = <0x0 0x1 0x3>;
+		};
+	};
+
+	/* LED_GLB_CTRL */
+	pinmux_led: pinmux@1b00a000 {
+		compatible = "pinctrl-single";
+		reg = <0x1b0000e4 0x4>;
+
+		pinctrl-single,bit-per-mux;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0x1>;
+		#pinctrl-cells = <2>;
+
+		/* enable GPIO 0 */
+		pinmux_disable_sys_led: disable_sys_led {
+			pinctrl-single,bits = <0x0 0x0 0x4000>;
+		};
+	};
+
+	ethernet0: ethernet@1b00a300 {
+		compatible = "realtek,rtl838x-eth";
+		reg = <0x1b00a300 0x100>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <24 3>;
+
+		phy-mode = "internal";
+
+		fixed-link {
+			speed = <1000>;
+			full-duplex;
+		};
+	};
+
+	switch0: switch@1b000000 {
+		status = "okay";
+		compatible = "realtek,rtl83xx-switch";
+
+		interrupt-parent = <&intc>;
+		interrupts = <20 2>;
+	};
+};