Message-ID: <20250821051047.3638978-3-donalds@nvidia.com>
Date: Wed, 20 Aug 2025 22:10:47 -0700
From: Donald Shannon <donalds@...dia.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<donalds@...dia.com>
CC: <joel@....id.au>, <andrew@...econstruct.com.au>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	<openbmc@...ts.ozlabs.org>, <etanous@...dia.com>
Subject: [PATCH 2/2] ARM: dts: aspeed: Add NVIDIA VR144NVL board

This is an Aspeed AST2600 based BMC board for the NVIDIA VR144NVL
Platform.

Reference to Ast2600 SOC [1].
Reference to DC-SCM Spec [2].

Link: https://www.aspeedtech.com/server_ast2600/ [1]
Link: https://www.opencompute.org/w/index.php?title=Server/MHS/DC-SCM-Specs-and-Designs [2]

Signed-off-by: Donald Shannon <donalds@...dia.com>
---
 arch/arm/boot/dts/aspeed/Makefile             |   1 +
 .../dts/aspeed/aspeed-bmc-nvidia-vr144nvl.dts | 879 ++++++++++++++++++
 2 files changed, 880 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr144nvl.dts

diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
index 8062c685f7e8..b479824c434b 100644
--- a/arch/arm/boot/dts/aspeed/Makefile
+++ b/arch/arm/boot/dts/aspeed/Makefile
@@ -55,6 +55,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-bmc-lenovo-hr855xg2.dtb \
 	aspeed-bmc-microsoft-olympus.dtb \
 	aspeed-bmc-nvidia-gb200nvl-bmc.dtb \
+	aspeed-bmc-nvidia-vr144nvl.dtb \
 	aspeed-bmc-opp-lanyang.dtb \
 	aspeed-bmc-opp-mowgli.dtb \
 	aspeed-bmc-opp-nicole.dtb \
diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr144nvl.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr144nvl.dts
new file mode 100644
index 000000000000..145b3838df8a
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr144nvl.dts
@@ -0,0 +1,879 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+#include "aspeed-g6.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	model = "AST2600 VR144NVL BMC";
+	compatible = "nvidia,vr144nvl-bmc", "aspeed,ast2600";
+
+	aliases {
+		serial2 = &uart3;
+		serial4 = &uart5;
+		i2c16 = &c0uphy0;
+		i2c17 = &c0uphy2;
+		i2c18 = &c0unused2;
+		i2c19 = &c0unused3;
+		i2c20 = &c0unused4;
+		i2c21 = &c0unused5;
+		i2c22 = &c0unused6;
+		i2c23 = &c0unused7;
+		i2c24 = &c1uphy0;
+		i2c25 = &c1uphy2;
+		i2c26 = &c1unused2;
+		i2c27 = &c1unused3;
+		i2c28 = &c1unused4;
+		i2c29 = &c1unused5;
+		i2c30 = &c1unused6;
+		i2c31 = &c1unused7;
+		i2c32 = &i2c_usb_hub;
+		i2c33 = &i2c_tpm;
+		i2c34 = &i2c_dp;
+		i2c35 = &i2c_rtc;
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		button-power {
+			label = "power_btn";
+			linux,code = <KEY_POWER>;
+			gpios = <&exp7 9 GPIO_ACTIVE_LOW>;
+		};
+		button-uid {
+			label = "uid_btn";
+			linux,code = <KEY_FN_1>;
+			gpios = <&exp7 11 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	chosen {
+		stdout-path = &uart5;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		hb-led {
+			gpios = <&gpio0 127 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_HEARTBEAT;
+			color = <LED_COLOR_ID_GREEN>;
+			label = "bmc-hbled";
+			linux,default-trigger = "heartbeat";
+			default-state = "on";
+			retain-state-suspended;
+			retain-state-shutdown;
+		};
+		pwr-led {
+			gpios = <&exp7 8 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_WHITE>;
+			label = "pwr-led";
+			linux,default-trigger = "default-on";
+			default-state = "on";
+			retain-state-suspended;
+			retain-state-shutdown;
+		};
+		uid-led {
+			gpios = <&exp7 10 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_INDICATOR;
+			color = <LED_COLOR_ID_BLUE>;
+			label = "uid-led";
+			default-state = "off";
+			retain-state-suspended;
+			retain-state-shutdown;
+		};
+		fault-led {
+			gpios = <&exp7 12 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_PANIC;
+			color = <LED_COLOR_ID_WHITE>;
+			label = "fault-led";
+			default-state = "off";
+			retain-state-suspended;
+			retain-state-shutdown;
+			panic-indicator;
+		};
+		warn-led {
+			gpios = <&exp7 15 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_PANIC;
+			color = <LED_COLOR_ID_RED>;
+			label = "warn-led";
+			default-state = "off";
+			retain-state-suspended;
+			retain-state-shutdown;
+		};
+	};
+
+	memory@...00000 {
+		device_type = "memory";
+		reg = <0x80000000 0x80000000>;
+	};
+
+	reg_3v3_stby: regulator-3v3-standby {
+		compatible = "regulator-fixed";
+		regulator-name = "3v3-standby";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio0 ASPEED_GPIO(M, 3) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		vga_memory: framebuffer@...00000 {
+			no-map;
+			reg = <0x9f000000 0x01000000>; /* 16M */
+		};
+
+		ramoops@...00000 {
+			compatible = "ramoops";
+			reg = <0xa0000000 0x100000>; /* 1MB */
+			record-size = <0x10000>; /* 64KB */
+			max-reason = <2>; /* KMSG_DUMP_OOPS */
+		};
+
+		gfx_memory: framebuffer {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x01000000>;
+			alignment = <0x01000000>;
+		};
+
+		video_engine_memory: jpegbuffer {
+			compatible = "shared-dma-pool";
+			reusable;
+			size = <0x02000000>;	/* 32M */
+			alignment = <0x01000000>;
+		};
+	};
+};
+
+// Enable Primary flash on FMC for bring up activity
+&fmc {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		label = "bmc";
+		spi-max-frequency = <50000000>;
+		status = "okay";
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			u-boot@0 {
+				// 896KB
+				reg = <0x0 0xe0000>;
+				label = "u-boot";
+			};
+
+			kernel@...000 {
+				// 9MB
+				reg = <0x100000 0x900000>;
+				label = "kernel";
+			};
+
+			rofs@...000 {
+				// 55292KB (extends to end of 64MB SPI - 4KB)
+				reg = <0xa00000 0x35FF000>;
+				label = "rofs";
+			};
+		};
+	};
+};
+
+&spi2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi2_default>;
+	status = "okay";
+	// Data SPI is 64MB in size
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		label = "config";
+		spi-max-frequency = <50000000>;
+		status = "okay";
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			u-boot-env@0 {
+				// 256KB
+				reg = <0x0 0x40000>;
+				label = "u-boot-env";
+			};
+
+			rwfs@...00 {
+				// 16MB
+				reg = <0x40000 0x1000000>;
+				label = "rwfs";
+			};
+
+			log@...0000 {
+				// 40MB
+				reg = <0x1040000 0x2800000>;
+				label = "log";
+			};
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+	ethphy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+&mac0 {
+	pinctrl-names = "default";
+	phy-mode = "rgmii-id";
+	phy-handle = <&ethphy0>;
+	pinctrl-0 = <&pinctrl_rgmii1_default>;
+	status = "okay";
+};
+
+// USB Port B
+&ehci1 {
+	status = "okay";
+};
+
+// USB Port B
+&uhci {
+	status = "okay";
+};
+
+// USB port A
+&vhub {
+	status = "okay";
+};
+
+&rng {
+	status = "okay";
+};
+
+&video {
+	memory-region = <&video_engine_memory>;
+	status = "okay";
+};
+
+&gpio0 {
+	gpio-line-names =
+		/*A0-A7*/ "", "", "", "", "", "", "", "",
+		/*B0-B7*/ "", "", "", "", "", "", "", "",
+		/*C0-C7*/ "", "", "", "", "", "", "", "",
+		/*D0-D7*/ "", "", "", "", "", "", "", "",
+		/*E0-E7*/ "RTL8221_PHY_RST_L-O", "RTL8211_PHY_INT_L-I",	"", "", "", "", "",
+					"MUX_SGPIO_SEL-O",
+		/*F0-F7*/ "", "", "", "", "", "", "", "",
+		/*G0-G7*/ "", "", "", "", "", "", "", "",
+		/*H0-H7*/ "", "", "", "", "", "", "", "",
+		/*I0-I7*/ "", "", "", "", "", "QSPI2_RST_L-O", "GLOBAL_WP-O", "BMC_DDR4_TEN-O",
+		/*J0-J7*/ "", "", "", "", "", "", "", "",
+		/*K0-K7*/ "", "", "", "", "", "", "", "",
+		/*L0-L7*/ "", "", "", "", "", "", "", "",
+		/*M0-M7*/ "HUB_RST_N-O", "BMC_FRU_WP-O", "SCM_PGOOD_C-O", "HPM_STBY_POWER_EN-O",
+					"STBY_POWER_PG_3V3-I", "PCIE_EP_RST_C_L-O", "", "",
+		/*N0-N7*/ "", "", "", "", "", "", "", "",
+		/*O0-O7*/ "", "", "", "", "", "", "", "",
+		/*P0-P7*/ "", "", "", "", "", "", "", "BMC_HBLED_L-O",
+		/*Q0-Q7*/ "", "", "", "", "", "", "", "",
+		/*R0-R7*/ "", "SP0_AP_INTR_N-I", "", "", "", "", "", "",
+		/*S0-S7*/ "", "", "", "", "", "", "", "",
+		/*T0-T7*/ "", "", "", "", "", "", "", "",
+		/*U0-U7*/ "", "", "", "", "", "", "", "",
+		/*V0-V7*/ "", "", "", "","PCB_TEMP_ALERT_L-I", "","", "",
+		/*W0-W7*/ "", "", "", "", "", "", "", "",
+		/*X0-X7*/ "", "", "", "", "", "", "", "",
+		/*Y0-Y7*/ "", "", "", "EMMC_RST_L-O", "","", "", "",
+		/*Z0-Z7*/ "GPIOZ0_EROT_OOB_INTR_N_C-I","", "", "", "", "", "", "";
+};
+
+&gpio1 {
+	/* 36 1.8V GPIOs */
+	gpio-line-names =
+		/*A0-A7*/ "", "", "", "", "", "", "", "",
+		/*B0-B7*/ "", "", "", "", "AP_EROT_REQ-O", "EROT_AP_GNT-I", "I2C_MGMT0_ALERT_N-I",
+					"",
+		/*C0-C7*/ "", "", "", "", "", "", "", "",
+		/*D0-D7*/ "", "", "", "", "", "", "", "I2C_SSIF_ALERT_N-I",
+		/*E0-E7*/ "", "", "", "", "", "", "", "";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&uart5 {
+	status = "okay";
+};
+
+// I2C1
+&i2c0 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C2
+// Baseboard 0 Management 1
+&i2c1 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9548";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+		i2c-mux-idle-disconnect;
+		vdd-supply = <&reg_3v3_stby>;
+
+		c0uphy0: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+		reg = <0>;
+		};
+
+		c0uphy2: i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+		};
+
+		c0unused2: i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <2>;
+		};
+
+		c0unused3: i2c@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <3>;
+		};
+
+		c0unused4: i2c@4 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <4>;
+		};
+
+		c0unused5: i2c@5 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <5>;
+		};
+
+		c0unused6: i2c@6 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <6>;
+		};
+
+		c0unused7: i2c@7 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <7>;
+		};
+	};
+
+	exp0: gpio@20 {
+		compatible = "nxp,pca9535";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"MCU_RESET_L-O",
+			"MCU_RECOVERY_L-O",
+			"GPU_MCU_RESET_L_3V3-O",
+			"GPU_MCU_RECOVERY_L_3V3-O",
+			"THERM_OVERT_L-I",
+			"THERM_WARN_L-I",
+			"HMC_IST_PRE_RST_L-O",
+			"CPLD_READY-I",
+			"MODULE_PWR_GOOD-I",
+			"MCU_HMC_ALERT_L-I",
+			"USB_HMC_HUB_RST_L-O",
+			"HPM_MCU_OK-I",
+			"CPU0_SHDN_OK_L_3V3-I",
+			"PRIMARY_NODE_L-O",
+			"IST_SYS_RST_L-O",
+			"PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp1: gpio@21 {
+		compatible = "nxp,pca9535";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"CPU_FORCED_RECOVERY_L-O",
+			"CPU_BOOT_DEV_SEL0-O",
+			"CPU_BOOT_DEV_SEL1-O",
+			"CPU_BOOT_DEV_SEL2-O",
+			"BOARD_ID_0-I",
+			"CPU_RECOVERY_TYPE0-O",
+			"CPU_RECOVERY_TYPE1-O",
+			"CPU_IST_BOOT_HMC-O",
+			"CPU_BOOT_CHAIN0-O",
+			"BOARD_ID_1-I",
+			"BOARD_ID_2-I",
+			"CPU_DIE_SEL0-O",
+			"CPU_DIE_SEL1-O",
+			"CPU_DIE_SEL2-O",
+			"CPU_BOOT_COMPLETE-I",
+			"IOX_JTAG_NVSEL-O";
+	};
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+};
+
+// I2C3
+// Baseboard 0 Management 0
+&i2c2 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp3: gpio@20 {
+		compatible = "nxp,pca9535";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"BMC_SHDN_FORCE_L-O",
+			"IOX_STBY_PWR_PGOOD-I",
+			"THERM_OVERT_L-I",
+			"THERM_WARN_L-I",
+			"GLOBAL_WP_BMC-O",
+			"USB_HUB0_RST_L-O",
+			"IOX_PRE_RST_N-O",
+			"LEAK_DETECT_L-I",
+			"RUN_PWR_EN-O",
+			"MODULE_PWR_GOOD-I",
+			"CPU_CHIPTHROT_L_3V3-I",
+			"SHDN_REQ_L_3V3-O",
+			"CPU0_SHDN_OK_L_3V3-I",
+			"CPU1_SHDN_OK_L_3V3-I",
+			"PWR_BRAKE_L_3V3-O",
+			"PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp4: gpio@21 {
+		compatible = "nxp,pca9535";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"I2C_BUS_MUX_RST_L-O",
+			"HPM_MCU_OK-I",
+			"AIC_USB_EN-O",
+			"SOCAMM_DAC_SEL0-O",
+			"SNN_SOCAMM_DAC_SEL1-O",
+			"C0_SOCAMM_I2C_SEL_R-O",
+			"SNN_C1_SOCAMM_I2C_SEL_R-O",
+			"EEPROM_POWER_DISABLE-O",
+			"CPU_L0L1_RST_L_3V3-I",
+			"CPU_L2_RST_L_3V3-I",
+			"BOARD_ID_0-I",
+			"BOARD_ID_1-I",
+			"BMC_LEAK_TEST_L-O",
+			"MCU_BMC_ALERT_L-I",
+			"CPU_BOOT_COMPLETE_3V3-I",
+			"BOARD_ID_2-I";
+	};
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+};
+
+// I2C4
+// Baseboard 1 Management 1
+&i2c3 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9548";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+		i2c-mux-idle-disconnect;
+		vdd-supply = <&reg_3v3_stby>;
+
+		c1uphy0: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+		};
+
+		c1uphy2: i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+		};
+
+		c1unused2: i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <2>;
+		};
+
+		c1unused3: i2c@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <3>;
+		};
+
+		c1unused4: i2c@4 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <4>;
+		};
+
+		c1unused5: i2c@5 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <5>;
+		};
+
+		c1unused6: i2c@6 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <6>;
+		};
+
+		c1unused7: i2c@7 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <7>;
+		};
+	};
+
+	exp5: gpio@20 {
+		compatible = "nxp,pca9535";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"MCU_RESET_L-O",
+			"MCU_RECOVERY_L-O",
+			"GPU_MCU_RESET_L_3V3-O",
+			"GPU_MCU_RECOVERY_L_3V3-O",
+			"THERM_OVERT_L-I",
+			"THERM_WARN_L-I",
+			"HMC_IST_PRE_RST_L-O",
+			"CPLD_READY-I",
+			"MODULE_PWR_GOOD-I",
+			"MCU_HMC_ALERT_L-I",
+			"USB_HMC_HUB_RST_L-O",
+			"HPM_MCU_OK-I",
+			"CPU0_SHDN_OK_L_3V3-I",
+			"PRIMARY_NODE_L-O",
+			"IST_SYS_RST_L-O",
+			"PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp6: gpio@21 {
+		compatible = "nxp,pca9535";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"CPU_FORCED_RECOVERY_L-O",
+			"CPU_BOOT_DEV_SEL0-O",
+			"CPU_BOOT_DEV_SEL1-O",
+			"CPU_BOOT_DEV_SEL2-O",
+			"BOARD_ID_0-I",
+			"CPU_RECOVERY_TYPE0-O",
+			"CPU_RECOVERY_TYPE1-O",
+			"CPU_IST_BOOT_HMC-O",
+			"CPU_BOOT_CHAIN0-O",
+			"BOARD_ID_1-I",
+			"BOARD_ID_2-I",
+			"CPU_DIE_SEL0-O",
+			"CPU_DIE_SEL1-O",
+			"CPU_DIE_SEL2-O",
+			"CPU_BOOT_COMPLETE-I",
+			"IOX_JTAG_NVSEL-O";
+	};
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+};
+
+// I2C5
+&i2c4 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C6
+// Management Board
+&i2c5 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp7: gpio@20 {
+		compatible = "nxp,pca9555";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"HMC_RST_R_L-O",
+			"HMC_RECOVERY_R-O",
+			"HMC_SPI_MUX_R_SEL-O",
+			"GLOBAL_WP-O",
+			"HMC_READY-I",
+			"HMC_PRSNT_R-I",
+			"BMC_SELF_PWR_CYCLE-O",
+			"EEDO_LED2-O",
+			"PWR_LED_L-O",
+			"PWR_BTN_L-I",
+			"UID_LED_L-O",
+			"UID_BTN_L-I",
+			"FAULT_LED_L-I",
+			"USB2_HUB_RST_L-O",
+			"BMC_M2_RST_L-O",
+			"WARN_LED_L-O";
+	};
+
+	temp-sensor@48 {
+		compatible = "ti,tmp1075";
+		reg = <0x48>;
+	};
+};
+
+// I2C7
+// BMC Expander + Management Board
+&i2c6 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp8: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+					"",
+					"",
+					"EROT_FATAL_ERROR_N-I",
+					"",
+					"",
+					"EROT_RECOV_N-O",
+					"NRESET_IN_IOX_N-O",
+					"";
+	};
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9546";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x70>;
+		i2c-mux-idle-disconnect;
+		vdd-supply = <&reg_3v3_stby>;
+
+		i2c_usb_hub:i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+		};
+
+		i2c_tpm:i2c@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+		};
+
+		i2c_dp:i2c@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <2>;
+		};
+
+		i2c_rtc:i2c@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <3>;
+		};
+	};
+};
+
+// I2C8
+// Baseboard 1 Management 0
+&i2c7 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp9: gpio@20 {
+		compatible = "nxp,pca9535";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"BMC_SHDN_FORCE_L-O",
+			"IOX_STBY_PWR_PGOOD-I",
+			"THERM_OVERT_L-I",
+			"THERM_WARN_L-I",
+			"GLOBAL_WP_BMC-O",
+			"USB_HUB0_RST_L-O",
+			"IOX_PRE_RST_N-O",
+			"LEAK_DETECT_L-I",
+			"RUN_PWR_EN-O",
+			"MODULE_PWR_GOOD-I",
+			"CPU_CHIPTHROT_L_3V3-I",
+			"SHDN_REQ_L_3V3-O",
+			"CPU0_SHDN_OK_L_3V3-I",
+			"CPU1_SHDN_OK_L_3V3-I",
+			"PWR_BRAKE_L_3V3-O",
+			"PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp10: gpio@21 {
+		compatible = "nxp,pca9535";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		vcc-supply = <&reg_3v3_stby>;
+		gpio-line-names =
+			"I2C_BUS_MUX_RST_L-O",
+			"HPM_MCU_OK-I",
+			"AIC_USB_EN-O",
+			"SOCAMM_DAC_SEL0-O",
+			"SNN_SOCAMM_DAC_SEL1-O",
+			"C0_SOCAMM_I2C_SEL_R-O",
+			"SNN_C1_SOCAMM_I2C_SEL_R-O",
+			"EEPROM_POWER_DISABLE-O",
+			"CPU_L0L1_RST_L_3V3-I",
+			"CPU_L2_RST_L_3V3-I",
+			"BOARD_ID_0-I",
+			"BOARD_ID_1-I",
+			"BMC_LEAK_TEST_L-O",
+			"MCU_BMC_ALERT_L-I",
+			"CPU_BOOT_COMPLETE_3V3-I",
+			"BOARD_ID_2-I";
+	};
+
+	eeprom@50 {
+		compatible = "atmel,24c64";
+		reg = <0x50>;
+		pagesize = <32>;
+	};
+};
+
+// I2C9
+&i2c8 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C10
+&i2c9 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C11
+// BMC FRU + TEMP
+&i2c10 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		pagesize = <16>;
+	};
+
+	temp-sensor@48 {
+		compatible = "ti,tmp1075";
+		reg = <0x48>;
+	};
+
+};
+
+// I2C13
+&i2c12 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C14
+&i2c13 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C15
+&i2c14 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+// I2C16
+&i2c15 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
-- 
2.43.0

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