[PATCH 2/2] ARM: dts: aspeed: Add NVIDIA VR-NVL BMC

[Jacky Huang <jackyhuang@nvidia.com>]

Add the device tree for the Aspeed AST2600 BMC for NVIDIA's Vera
Rubin NVL compute platform.

MAC0 uses phy-mode = "rgmii-id" because the on-board PHY supplies
both RGMII internal delays.  The matching U-Boot device tree does not
enable SoC-side MAC clock delays, leaving the MAC internal delay at
zero so the PHY-provided delay is not doubled by the MAC controller.

The corresponding U-Boot change has been submitted to openbmc/u-boot:
Link: https://lore.kernel.org/all/20260629105202.1417679-1-jackyhuang@nvidia.com/

Signed-off-by: Jacky Huang <jackyhuang@nvidia.com>
---
 arch/arm/boot/dts/aspeed/Makefile             |   1 +
 .../aspeed/aspeed-bmc-nvidia-vr-nvl-bmc.dts   | 901 ++++++++++++++++++
 2 files changed, 902 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr-nvl-bmc.dts

diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
index 6b68671f9379..07e10083a8bd 100644
--- a/arch/arm/boot/dts/aspeed/Makefile
+++ b/arch/arm/boot/dts/aspeed/Makefile
@@ -65,6 +65,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-bmc-microsoft-olympus.dtb \
 	aspeed-bmc-nvidia-gb200nvl-bmc.dtb \
 	aspeed-bmc-nvidia-msx4-bmc.dtb \
+	aspeed-bmc-nvidia-vr-nvl-bmc.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-vr-nvl-bmc.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr-nvl-bmc.dts
new file mode 100644
index 000000000000..f035e9b28f64
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-nvidia-vr-nvl-bmc.dts
@@ -0,0 +1,901 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2026 NVIDIA Corporation
+
+/dts-v1/;
+
+#include "aspeed-g6.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
+#include <dt-bindings/i2c/i2c.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	model = "AST2600 VR NVL BMC";
+	compatible = "nvidia,vr-nvl-bmc", "aspeed,ast2600";
+
+	aliases {
+		i2c16 = &i2c_usbhub;
+		i2c17 = &i2c_tpm;
+		i2c18 = &i2c_dp;
+		serial2 = &uart3;
+		serial4 = &uart5;
+	};
+
+	chosen {
+		stdout-path = &uart5;
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x80000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		vga_memory: framebuffer@9f000000 {
+			no-map;
+			reg = <0x9f000000 0x01000000>;	/* 16 MiB */
+		};
+
+		ramoops@a0000000 {
+			compatible = "ramoops";
+			reg = <0xa0000000 0x100000>;	/* 1 MiB */
+			record-size = <0x10000>;	/* 64 KiB */
+			max-reason = <2>;		/* KMSG_DUMP_OOPS */
+		};
+
+		gfx_memory: framebuffer {
+			compatible = "shared-dma-pool";
+			size = <0x01000000>;
+			alignment = <0x01000000>;
+			reusable;
+		};
+
+		video_engine_memory: jpegbuffer {
+			compatible = "shared-dma-pool";
+			size = <0x02000000>;		/* 32 MiB */
+			alignment = <0x01000000>;
+			reusable;
+		};
+	};
+
+	standby_power_regulator: regulator-standby-power {
+		compatible = "regulator-fixed";
+		regulator-name = "standby_power";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		gpios = <&gpio0 ASPEED_GPIO(M, 3) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			label = "uid_led";
+			gpios = <&exp4 10 GPIO_ACTIVE_LOW>;
+		};
+
+		led-1 {
+			label = "fault_led";
+			gpios = <&exp4 12 GPIO_ACTIVE_LOW>;
+		};
+
+		led-2 {
+			label = "power_led";
+			gpios = <&exp4 8 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&ehci1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub@1 {
+		reg = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hub@1 {
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			hub@4 {
+				reg = <4>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				/* port 1: BlueField-4 SMA management interface */
+				device@1 {
+					reg = <1>;
+					#address-cells = <2>;
+					#size-cells = <0>;
+
+					interface@1 {
+						reg = <1 1>;
+					};
+				};
+
+				cp2112g: device@2 {
+					reg = <2>;
+					gpio-controller;
+					#gpio-cells = <2>;
+					interrupt-controller;
+					#interrupt-cells = <2>;
+					gpio-line-names =
+						"BF4_USB_MCU_RECOVERY_L",
+						"BF4_USB_MCU_RST_L",
+						"BF4_USB_FORCE_FNP_L",
+						"BF4_GLOBAL_WP",
+						"BF4_FORCE_POR_L",
+						"BF4_BMC_EROT_RST_L",
+						"BF4_BMC_EROT_RECOVERY_L",
+						"BF4_THERM_SHUTDOWN";
+				};
+			};
+		};
+
+		hub@2 {
+			reg = <2>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			hub@1 {
+				reg = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				hub@3 {
+					reg = <3>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+					device@1 {
+						reg = <1>;
+						#address-cells = <2>;
+						#size-cells = <0>;
+
+						iob1_sma: interface@1 {
+							reg = <1 1>;
+
+							gpio-controller;
+							#gpio-cells = <2>;
+							interrupt-controller;
+							#interrupt-cells = <2>;
+						};
+					};
+
+					cp2112c: device@2 {
+						reg = <2>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+						gpio-line-names =
+							"IOB1_MCP_P0_2-B",
+							"IOB1_MCU_RST_L-O",
+							"IOB1_MCU_RECOVERY_L-O",
+							"IOB1_GLOBAL_WP-O",
+							"IOB1_GLOBAL_ADDR_L_R-O",
+							"IOB1_GLOBAL_ADDR_U_D-O",
+							"IOB1_PWR_EN-O",
+							"IOB1_MCU_READY_STATUS-I";
+					};
+				};
+
+				hub@4 {
+					reg = <4>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+					device@1 {
+						reg = <1>;
+						#address-cells = <2>;
+						#size-cells = <0>;
+
+						iob0_sma: interface@1 {
+							reg = <1 1>;
+
+							gpio-controller;
+							#gpio-cells = <2>;
+							interrupt-controller;
+							#interrupt-cells = <2>;
+						};
+					};
+
+					cp2112d: device@2 {
+						reg = <2>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+						gpio-line-names =
+							"IOB0_MCP_P0_2-B",
+							"IOB0_MCU_RST_L-O",
+							"IOB0_MCU_RECOVERY_L-O",
+							"IOB0_GLOBAL_WP-O",
+							"IOB0_GLOBAL_ADDR_L_R-O",
+							"IOB0_GLOBAL_ADDR_U_D-O",
+							"IOB0_PWR_EN-O",
+							"IOB0_MCU_READY_STATUS-I";
+					};
+				};
+
+				device@1 {
+					reg = <1>;
+					#address-cells = <2>;
+					#size-cells = <0>;
+
+					cp2112a: interface@1 {
+						reg = <1 1>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+					};
+				};
+			};
+
+			hub@2 {
+				reg = <2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				hub@3 {
+					reg = <3>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+					device@1 {
+						reg = <1>;
+						#address-cells = <2>;
+						#size-cells = <0>;
+
+						iob2_sma: interface@1 {
+							reg = <1 1>;
+
+							gpio-controller;
+							#gpio-cells = <2>;
+							interrupt-controller;
+							#interrupt-cells = <2>;
+						};
+					};
+
+					cp2112e: device@2 {
+						reg = <2>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+						gpio-line-names =
+							"IOB2_MCP_P0_2-B",
+							"IOB2_MCU_RST_L-O",
+							"IOB2_MCU_RECOVERY_L-O",
+							"IOB2_GLOBAL_WP-O",
+							"IOB2_GLOBAL_ADDR_L_R-O",
+							"IOB2_GLOBAL_ADDR_U_D-O",
+							"IOB2_PWR_EN-O",
+							"IOB2_MCU_READY_STATUS-I";
+					};
+				};
+
+				hub@4 {
+					reg = <4>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+					device@1 {
+						reg = <1>;
+						#address-cells = <2>;
+						#size-cells = <0>;
+
+						iob3_sma: interface@1 {
+							reg = <1 1>;
+
+							gpio-controller;
+							#gpio-cells = <2>;
+							interrupt-controller;
+							#interrupt-cells = <2>;
+						};
+					};
+
+					cp2112f: device@2 {
+						reg = <2>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+						gpio-line-names =
+							"IOB3_MCP_P0_2-B",
+							"IOB3_MCU_RST_L-O",
+							"IOB3_MCU_RECOVERY_L-O",
+							"IOB3_GLOBAL_WP-O",
+							"IOB3_GLOBAL_ADDR_L_R-O",
+							"IOB3_GLOBAL_ADDR_U_D-O",
+							"IOB3_PWR_EN-O",
+							"IOB3_MCU_READY_STATUS-I";
+					};
+				};
+
+				device@1 {
+					reg = <1>;
+					#address-cells = <2>;
+					#size-cells = <0>;
+
+					cp2112b: interface@1 {
+						reg = <1 1>;
+						gpio-controller;
+						#gpio-cells = <2>;
+						interrupt-controller;
+						#interrupt-cells = <2>;
+					};
+				};
+			};
+		};
+	};
+};
+
+&fmc {
+	status = "okay";
+
+	flash@0 {
+		label = "bmc";
+		status = "okay";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0xe0000>;		/* 896 KiB */
+				label = "u-boot";
+			};
+
+			partition@100000 {
+				reg = <0x100000 0x900000>;	/* 9 MiB */
+				label = "kernel";
+			};
+
+			partition@a00000 {
+				/*
+				 * extends to end of 64 MiB - 4 KiB; last
+				 * 4 KiB reserved for EROT image
+				 */
+				reg = <0xa00000 0x35ff000>;
+				label = "rofs";
+			};
+		};
+	};
+};
+
+&gpio0 {
+	gpio-line-names =
+		/* A0-A7 */ "", "", "", "", "", "", "", "",
+		/* B0-B7 */ "", "", "", "", "", "", "", "",
+		/* C0-C7 */ "", "BF4_USB_RST_L-O", "", "", "", "", "", "",
+		/* D0-D7 */ "", "", "", "", "", "FPGA_PEX_RST_L", "", "",
+		/* 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_BMC-I", "BMC_DDR4_TEN-O",
+		/* J0-J7 */ "", "", "", "", "", "", "", "",
+		/* K0-K7 */ "", "", "", "", "", "", "", "",
+		/* L0-L7 */ "", "", "", "", "", "", "", "",
+		/* M0-M7 */ "USB_HUB_RST_N-O", "BMC_FRU_WP-O",
+			    "", "HMC_STBY_POWER_EN-O", "STBY_POWER_PG-I",
+			    "PCIE_EP_RST_L-O", "", "",
+		/* N0-N7 */ "", "", "", "", "", "", "", "",
+		/* O0-O7 */ "", "", "", "", "", "", "", "",
+		/* P0-P7 */ "", "", "", "", "", "", "", "",
+		/* Q0-Q7 */ "", "", "", "", "", "", "", "",
+		/* R0-R7 */ "", "SP0_AP_INTR_N-I", "", "", "", "", "", "",
+		/* S0-S7 */ "", "", "", "", "", "", "", "",
+		/* T0-T7 */ "", "", "", "", "", "", "", "",
+		/* U0-U7 */ "", "", "", "", "", "", "", "",
+		/* V0-V7 */ "", "", "", "", "",
+			    "PCB_TEMP_ALERT-I", "", "",
+		/* W0-W7 */ "", "", "", "", "", "", "", "CPU_RST_L-I",
+		/* X0-X7 */ "", "", "", "", "", "", "", "",
+		/* Y0-Y7 */ "", "", "", "EMMC_RST-O", "", "", "", "",
+		/* Z0-Z7 */ "HMC_EROT_SPI_INT_L-I",
+			    "", "", "", "", "", "", "";
+};
+
+&gpio1 {
+	gpio-line-names =
+		/* A0-A7 */ "", "", "", "", "", "", "", "",
+		/* B0-B7 */ "", "", "", "", "AP_EROT_REQ-O",
+			    "EROT_AP_GNT-I", "IO_EXPANDER_INT_L-I", "",
+		/* C0-C7 */ "", "", "", "", "", "", "", "",
+		/* D0-D7 */ "", "", "", "", "", "", "",
+			    "I2C_SSIF_ALERT_L-I",
+		/* E0-E7 */ "", "", "", "", "", "", "", "";
+};
+
+/* SSIF (CPU0 host IPMI) */
+&i2c0 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+/* BMC <-> HMC management (FRU proxy) */
+&i2c1 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+&i2c2 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp0: gpio@20 {
+		compatible = "nxp,pca9555";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		vcc-supply = <&standby_power_regulator>;
+		gpio-line-names =
+			"B0_M0_SHDN_FORCE_L-O",
+			"B0_M0_STBY_POWER_PG-I",
+			"B0_M0_THERM_OVERT_L-I",
+			"B0_M0_THERM_WARN_L-I",
+			"B0_M0_GLOBAL_WP-O",
+			"B0_M0_USB_HUB0_RST_L-O",
+			"B0_M0_PRE_SYS_RST_L-O",
+			"B0_M0_LEAK_DETECT_ALERT_L-I",
+			"B0_M0_RUN_POWER_EN-O",
+			"B0_M0_RUN_POWER_PG-I",
+			"B0_M0_CPU_CHIPTHROT_L-O",
+			"B0_M0_SHDN_REQ_L-O",
+			"B0_M0_CPU_SHDN_OK_L-I",
+			"B0_M0_CPLD_READY-I",
+			"B0_M0_PWR_BRAKE_L-O",
+			"B0_M0_PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp1: gpio@21 {
+		compatible = "nxp,pca9555";
+		reg = <0x21>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		vcc-supply = <&standby_power_regulator>;
+		gpio-line-names =
+			"B0_M0_I2C_BUS_MUX_RESET_L-O",
+			"B0_M0_HPM_MCU_OK-I",
+			"B0_M0_CPU_L0_RST_IND_L-O",
+			"B0_M0_C0_SOCAMM_DAC_SEL0-O",
+			"B0_M0_C1_SOCAMM_DAC_SEL1-O",
+			"B0_M0_C0_SOCAMM_I2C_SEL_R-O",
+			"B0_M0_C1_SOCAMM_I2C_SEL_R-O",
+			"B0_M0_EEPROM_POWER_DISABLE-O",
+			"B0_M0_L0L1_RST_L-I",
+			"B0_M0_L2_RST_L-I",
+			"B0_M0_BRD_ID_0-I",
+			"B0_M0_BRD_ID_1-I",
+			"B0_M0_BMC_LEAK_TEST_L-O",
+			"B0_M0_MCU_BMC_ALERT_L-I",
+			"B0_M0_CPU_BOOT_COMPLETE_3V3-I",
+			"B0_M0_BMC_TO_GPU_MCU_I2C_EN-O";
+	};
+};
+
+/* HMC virtual EEPROM / sensor proxy */
+&i2c3 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+/* MCIO expansion connector (HPM board 0) */
+&i2c4 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+&i2c5 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp4: gpio@20 {
+		compatible = "nxp,pca9555";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		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-O",
+			"USB2_HUB_RST_L-O",
+			"IOX_GPIO_P16_TP",
+			"WARN_LED_L-O";
+	};
+
+	exp5: gpio@21 {
+		compatible = "nxp,pca9555";
+		reg = <0x21>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"BMC_HMC_MUX_SEL-O",
+			"BMC_TPM_MUX_SEL-O",
+			"BMC_USB2_MUX_SEL-O",
+			"HMC_PGOOD_3V3-I",
+			"BF3_AOC_NCSI_PRSNT_L-I",
+			"HDR_SPI_PRSNT_L-I",
+			"SW_NRESET_R_L-O",
+			"MUX_I2C_ESPI_SEL-O",
+			"I2C_BUS_MUX_RESET_L-O",
+			"USB_MUX_EN-O",
+			"PDB_TRAY_RST-O",
+			"USB_PWR_EN-O",
+			"RTC_CLR_L-O",
+			"I2C_RTC_ALERT_L-I",
+			"X86_TPM_RST_SEL_L-O",
+			"BMC_MUX_PI3DP_SEL-O";
+	};
+};
+
+&i2c6 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp19: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"", "",
+			"HMC_EROT_FATAL_ERROR_L-I", "",
+			"", "HMC_EROT_RECOVERY_L-O",
+			"HMC_EROT_RESET_L-O", "";
+	};
+
+	i2c-mux@70 {
+		compatible = "nxp,pca9546";
+		reg = <0x70>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
+
+		/* USB hub sideband */
+		i2c_usbhub: i2c@0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		/* optional TPM mux (unused; primary TPM is SPI) */
+		i2c_tpm: i2c@1 {
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		/* DisplayPort/USB-C crossbar */
+		i2c_dp: i2c@2 {
+			reg = <2>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+};
+
+&i2c7 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp2: gpio@20 {
+		compatible = "nxp,pca9555";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		vcc-supply = <&standby_power_regulator>;
+		gpio-line-names =
+			"B1_M0_SHDN_FORCE_L-O",
+			"B1_M0_STBY_POWER_PG-I",
+			"B1_M0_THERM_OVERT_L-I",
+			"B1_M0_THERM_WARN_L-I",
+			"B1_M0_GLOBAL_WP-O",
+			"B1_M0_USB_HUB0_RST_L-O",
+			"B1_M0_PRE_SYS_RST_L-O",
+			"B1_M0_LEAK_DETECT_ALERT_L-I",
+			"B1_M0_RUN_POWER_EN-O",
+			"B1_M0_RUN_POWER_PG-I",
+			"B1_M0_CPU_CHIPTHROT_L-O",
+			"B1_M0_SHDN_REQ_L-O",
+			"B1_M0_CPU_SHDN_OK_L-I",
+			"B1_M0_CPLD_READY-I",
+			"B1_M0_PWR_BRAKE_L-O",
+			"B1_M0_PWR_BRAKE_STATUS_L-I";
+	};
+
+	exp3: gpio@21 {
+		compatible = "nxp,pca9555";
+		reg = <0x21>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		vcc-supply = <&standby_power_regulator>;
+		gpio-line-names =
+			"B1_M0_I2C_BUS_MUX_RESET_L-O",
+			"B1_M0_HPM_MCU_OK-I",
+			"B1_M0_CPU_L0_RST_IND_L-O",
+			"B1_M0_C0_SOCAMM_DAC_SEL0-O",
+			"B1_M0_C1_SOCAMM_DAC_SEL1-O",
+			"B1_M0_C0_SOCAMM_I2C_SEL_R-O",
+			"B1_M0_C1_SOCAMM_I2C_SEL_R-O",
+			"B1_M0_EEPROM_POWER_DISABLE-O",
+			"B1_M0_L0L1_RST_L-I",
+			"B1_M0_L2_RST_L-I",
+			"B1_M0_BRD_ID_0-I",
+			"B1_M0_BRD_ID_1-I",
+			"B1_M0_BMC_LEAK_TEST_L-O",
+			"B1_M0_MCU_BMC_ALERT_L-I",
+			"B1_M0_CPU_BOOT_COMPLETE_3V3-I",
+			"B1_M0_BMC_TO_GPU_MCU_I2C_EN-O";
+	};
+};
+
+/* SSIF (CPU1 host IPMI) */
+&i2c8 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+&i2c9 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	exp6: gpio@20 {
+		compatible = "nxp,pca9555";
+		reg = <0x20>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"PDB_STRAP-I",
+			"STBY_POWER_EN-O",
+			"STBY_PWR_OK-I",
+			"", "",
+			"MAIN_PWR_EN-O",
+			"MAIN_PWR_OK-I",
+			"PDB_GLB_WP-O",
+			"PDB_PWR_BRK_L-I",
+			"FAN_PRSNT-I",
+			"", "",
+			"HSC4_S5_OR_S0_N-O",
+			"", "", "";
+	};
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		pagesize = <8>;
+	};
+
+	exp7: gpio@75 {
+		compatible = "nxp,pca9555";
+		reg = <0x75>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"SNN_PDB_RUN_IO0_A_R_PG-I",
+			"RST_STBY_R_L-O",
+			"SNN_PDB_RUN_IO0_B_R_EN-O",
+			"PSU1_PRSNT_R_N-O",
+			"PSU2_PRSNT_R_N-O",
+			"PSU3_PRSNT_R_N-O",
+			"PSU4_PRSNT_R_N-O",
+			"PDB_12V_PG_R-I",
+			"PDB_12V_2_PG_R-I",
+			"PDB_12V_2_EN_R-O",
+			"PDB_12V_EN_N_R-O",
+			"",
+			"HSC_PG_VIN_PG_R-I",
+			"PDB_PSU_SMB_ALERT_L_R-O",
+			"SNN_JSB2_17_R-I",
+			"TRAY_RST_L_R-I";
+	};
+};
+
+&i2c10 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "atmel,24c02";
+		reg = <0x50>;
+		pagesize = <8>;
+	};
+};
+
+/* Realtek Ethernet switch config EEPROM */
+&i2c11 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+/* BMC EROT */
+&i2c12 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+&i2c13 {
+	clock-frequency = <400000>;
+	multi-master;
+	mctp-controller;
+	status = "okay";
+
+	mctp-controller@18 {
+		compatible = "mctp-i2c-controller";
+		reg = <(0x18 | I2C_OWN_SLAVE_ADDRESS)>;
+	};
+
+	exp18: gpio@38 {
+		compatible = "nxp,pca9554";
+		reg = <0x38>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <ASPEED_GPIO(B, 6) IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"SSD0_PRSNT_L-I",
+			"E1S_PWR_EN-O",
+			"SSD0_PWRDIS-O",
+			"I2C_PDB_ALERT_L-I",
+			"BMC_SSD0_RST_L-O",
+			"GLOBAL_WP_E1S-O",
+			"12V_SSD0_PGD-I",
+			"SSD0_LED-O";
+	};
+};
+
+/* MCIO expansion connector (HPM board 1) */
+&i2c14 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+/* USB-C PD controller */
+&i2c15 {
+	clock-frequency = <400000>;
+	status = "okay";
+};
+
+&mac0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii1_default>;
+	/*
+	 * The on-board PHY is strapped to add both RX and TX RGMII
+	 * internal delays; declare "rgmii-id" so the MAC does not add
+	 * additional delay.  The same setting is applied in the
+	 * matching u-boot DTS to keep early-boot networking working.
+	 */
+	phy-mode = "rgmii-id";
+	phy-handle = <&ethphy0>;
+	status = "okay";
+};
+
+&mdio0 {
+	status = "okay";
+
+	ethphy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+&spi2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi2_default>;
+	status = "okay";
+
+	flash@0 {
+		label = "config";
+		status = "okay";
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x40000>;	/* 256 KiB */
+				label = "u-boot-env";
+			};
+
+			partition@40000 {
+				reg = <0x40000 0x1000000>;	/* 16 MiB */
+				label = "rwfs";
+			};
+
+			partition@1040000 {
+				reg = <0x1040000 0x2800000>;	/* 40 MiB */
+				label = "log";
+			};
+		};
+	};
+};
+
+/* BMC <-> host CPU UART */
+&uart1 {
+	status = "okay";
+};
+
+/* Serial-over-LAN */
+&uart3 {
+	status = "okay";
+};
+
+/* BMC debug console */
+&uart5 {
+	status = "okay";
+};
+
+&uart_routing {
+	status = "okay";
+};
+
+&vhub {
+	status = "okay";
+};
+
+&video {
+	memory-region = <&video_engine_memory>;
+	status = "okay";
+};
-- 
2.43.0