diff --git a/src/arm/aspeed/aspeed-bmc-portwell-neptune.dts b/src/arm/aspeed/aspeed-bmc-portwell-neptune.dts
new file mode 100644
index 0000000..a5e64cc
--- /dev/null
+++ b/src/arm/aspeed/aspeed-bmc-portwell-neptune.dts
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017 Facebook Inc.
+/dts-v1/;
+
+#include "aspeed-g5.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+
+/ {
+	model = "Portwell Neptune BMC";
+	compatible = "portwell,neptune-bmc", "aspeed,ast2500";
+	aliases {
+		serial0 = &uart1;
+		serial4 = &uart5;
+	};
+	chosen {
+		stdout-path = &uart5;
+		bootargs = "console=ttyS4,115200 earlycon";
+	};
+
+	memory@80000000 {
+		reg = <0x80000000 0x20000000>;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		postcode0 {
+			label = "BMC_UP";
+			gpios = <&gpio ASPEED_GPIO(H, 0) GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+		postcode1 {
+			label = "BMC_HB";
+			gpios = <&gpio ASPEED_GPIO(H, 1) GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+		postcode2 {
+			label = "FAULT";
+			gpios = <&gpio ASPEED_GPIO(H, 2) GPIO_ACTIVE_HIGH>;
+		};
+		// postcode3-7 are GPIOH3-H7
+	};
+};
+
+&fmc {
+	status = "okay";
+	flash@0 {
+		status = "okay";
+		m25p,fast-read;
+#include "openbmc-flash-layout.dtsi"
+	};
+};
+
+&spi1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi1_default>;
+	flash@0 {
+		status = "okay";
+		m25p,fast-read;
+		label = "pnor";
+	};
+};
+
+&uart1 {
+	// Host Console
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_txd1_default
+		     &pinctrl_rxd1_default>;
+};
+
+&uart5 {
+	// BMC Console
+	status = "okay";
+};
+
+&mac0 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rmii1_default
+		     &pinctrl_mdio1_default>;
+	clocks = <&syscon ASPEED_CLK_GATE_MAC1CLK>,
+		 <&syscon ASPEED_CLK_MAC1RCLK>;
+	clock-names = "MACCLK", "RCLK";
+};
+
+&mac1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rmii2_default>;
+	clocks = <&syscon ASPEED_CLK_GATE_MAC2CLK>,
+		 <&syscon ASPEED_CLK_MAC2RCLK>;
+	clock-names = "MACCLK", "RCLK";
+	use-ncsi;
+};
+
+&i2c1 {
+	status = "okay";
+	// To PCIe slot SMBUS
+};
+
+&i2c2 {
+	status = "okay";
+	// To LAN I210
+};
+
+&i2c3 {
+	status = "okay";
+	// SMBus to COMe AB
+};
+
+&i2c4 {
+	status = "okay";
+	// I2C to COMe AB
+};
+
+&i2c5 {
+	status = "okay";
+// 	USB Debug card
+	pca9555@27 {
+		compatible = "nxp,pca9555";
+		reg = <0x27>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+};
+
+&i2c6 {
+	status = "okay";
+	tpm@20 {
+		compatible = "infineon,slb9645tt";
+		reg = <0x20>;
+	};
+	tmp421@4e {
+		compatible = "ti,tmp421";
+		reg = <0x4e>;
+	};
+	tmp421@4f {
+		compatible = "ti,tmp421";
+		reg = <0x4f>;
+	};
+};
+
+&i2c8 {
+	status = "okay";
+	eeprom@51 {
+		compatible = "atmel,24c128";
+		reg = <0x51>;
+		pagesize = <32>;
+	};
+};
+
+&pwm_tacho {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default>;
+	fan@0 {
+		reg = <0x00>;
+		aspeed,fan-tach-ch = /bits/ 8 <0x00>;
+	};
+
+	fan@1 {
+		reg = <0x00>;
+		aspeed,fan-tach-ch = /bits/ 8 <0x01>;
+	};
+};