[PATCH] Adding architectural support for HPE's GXP BMC. This is the first of a series of patches to support HPE's BMC with Linux Kernel.

[nick.hawkins@hpe.com]

From: Nick Hawkins <nick.hawkins@hpe.com>

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
---
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   8 +
 arch/arm/Kconfig                              |   2 +
 arch/arm/boot/dts/gxp.dts                     | 700 ++++++++++++++++++
 arch/arm/configs/gxp_defconfig                | 243 ++++++
 arch/arm/mach-hpe/Kconfig                     |  20 +
 arch/arm/mach-hpe/Makefile                    |   1 +
 arch/arm/mach-hpe/gxp.c                       |  63 ++
 8 files changed, 1039 insertions(+)
 create mode 100644 arch/arm/boot/dts/gxp.dts
 create mode 100644 arch/arm/configs/gxp_defconfig
 create mode 100644 arch/arm/mach-hpe/Kconfig
 create mode 100644 arch/arm/mach-hpe/Makefile
 create mode 100644 arch/arm/mach-hpe/gxp.c

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 294093d45a23..e8b0ec874aed 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -515,6 +515,8 @@ patternProperties:
     description: Jiangsu HopeRun Software Co., Ltd.
   "^hp,.*":
     description: Hewlett Packard
+  "^hpe,.*":
+    description: Hewlett Packard Enterprise
   "^hsg,.*":
     description: HannStar Display Co.
   "^holtek,.*":
diff --git a/MAINTAINERS b/MAINTAINERS
index ea3e6c914384..007d99734dd1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8382,6 +8382,14 @@ L:	linux-efi@vger.kernel.org
 S:	Maintained
 F:	block/partitions/efi.*
 
+GXP ARCHITECTURE
+M:	Jean-Marie Verdun <verdun@hpe.com>
+M:	Nick Hawkins <nick.hawkins@hpe.com>
+S:	Maintained
+F:	arch/arm/boot/dts/gxp.dts
+F:	arch/arm/configs/gxp_defconfig
+F:	arch/arm/mach-hpe/gxp.c
+
 H8/300 ARCHITECTURE
 M:	Yoshinori Sato <ysato@users.sourceforge.jp>
 L:	uclinux-h8-devel@lists.sourceforge.jp (moderated for non-subscribers)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index fabe39169b12..d428d0d35889 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -708,6 +708,8 @@ source "arch/arm/mach-vt8500/Kconfig"
 
 source "arch/arm/mach-zynq/Kconfig"
 
+source "arch/arm/mach-hpe/Kconfig"
+
 # ARMv7-M architecture
 config ARCH_LPC18XX
 	bool "NXP LPC18xx/LPC43xx"
diff --git a/arch/arm/boot/dts/gxp.dts b/arch/arm/boot/dts/gxp.dts
new file mode 100644
index 000000000000..7bd814ecaaee
--- /dev/null
+++ b/arch/arm/boot/dts/gxp.dts
@@ -0,0 +1,700 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree file for HPE GXP
+ */
+
+/dts-v1/;
+/ {
+  #address-cells = <1>;
+  #size-cells = <1>;
+	compatible = "HPE,GXP";
+	model = "GXP";
+
+	chosen {
+		bootargs = "earlyprintk console=ttyS0,115200 user_debug=31";
+	};
+
+	aliases {
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x20000000>;
+	};
+
+	ahb@80000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		vic0: vic@ceff0000 {
+			compatible = "arm,pl192-vic";
+			interrupt-controller;
+			reg = <0xceff0000 0x1000>;
+			#interrupt-cells = <1>;
+		};
+
+		vic1: vic@80f00000 {
+			compatible = "arm,pl192-vic";
+			interrupt-controller;
+			reg = <0x80f00000 0x1000>;
+			#interrupt-cells = <1>;
+		};
+
+		timer0: timer@c0000080 {
+			compatible = "hpe,gxp-timer";
+			reg = <0xc0000080 0x1>, <0xc0000094 0x01>, <0xc0000088 0x08>;
+			interrupts = <0>;
+			interrupt-parent = <&vic0>;
+			clock-frequency = <400000000>;
+		};
+
+		watchdog: watchdog@c0000090 {
+			compatible = "hpe,gxp-wdt";
+			reg = <0xc0000090 0x02>, <0xc0000096 0x01>;
+		};
+
+		uartc: serial@c00000f0 {
+			compatible = "ns16550a";
+			reg = <0xc00000f0 0x8>;
+			interrupts = <19>;
+			interrupt-parent = <&vic0>;
+			clock-frequency = <1846153>;
+			reg-shift = <0>;
+		};
+
+		uarta: serial@c00000e0 {
+			compatible = "ns16550a";
+			reg = <0xc00000e0 0x8>;
+			interrupts = <17>;
+			interrupt-parent = <&vic0>;
+			clock-frequency = <1846153>;
+			reg-shift = <0>;
+		};
+
+		uartb: serial@c00000e8 {
+			compatible = "ns16550a";
+			reg = <0xc00000e8 0x8>;
+			interrupts = <18>;
+			interrupt-parent = <&vic0>;
+			clock-frequency = <1846153>;
+			reg-shift = <0>;
+		};
+
+		vuart_a_cfg: vuarta_cfg@80fc0230 {
+			compatible = "hpe,gxp-vuarta_cfg", "simple-mfd", "syscon";
+			reg = <0x80fc0230 0x100>;
+			reg-io-width = <1>;
+		};
+
+		vuart_a: vuart_a@80fd0200 {
+			compatible = "hpe,gxp-vuart";
+			reg = <0x80fd0200 0x100>;
+			interrupts = <2>;
+			interrupt-parent = <&vic1>;
+			clock-frequency = <1846153>;
+			reg-shift = <0>;
+			status = "okay";
+			serial-line = <3>;
+			vuart_cfg = <&vuart_a_cfg>;
+		};
+
+		usb0: ehci@cefe0000 {
+			compatible = "generic-ehci";
+			reg = <0xcefe0000 0x100>;
+			interrupts = <7>;
+			interrupt-parent = <&vic0>;
+		};
+
+		usb1: ohci@cefe0100 {
+			compatible = "generic-ohci";
+			reg = <0xcefe0100 0x110>;
+			interrupts = <6>;
+			interrupt-parent = <&vic0>;
+		};
+
+		spifi0: spifi@c0000200 {
+			compatible = "hpe,gxp-spifi";
+			reg = <0xc0000200 0x80>, <0xc000c000 0x100>, <0xf8000000 0x8000000>;
+			interrupts = <20>;
+			interrupt-parent = <&vic0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			flash@0 {
+				compatible = "jedec,spi-nor";
+				reg = <0>;
+				partitions {
+					compatible = "fixed-partitions";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					bmc@0 {
+						label = "bmc";
+						reg = <0x0 0x2000000>;
+					};
+					u-boot@0 {
+						label = "u-boot";
+						reg = <0x0 0x60000>;
+					};
+					u-boot-env@60000 {
+						label = "u-boot-env";
+						reg = <0x60000 0x20000>;
+					};
+					kernel@80000 {
+						label = "kernel";
+						reg = <0x80000 0x4c0000>;
+					};
+					rofs@540000 {
+						label = "rofs";
+						reg = <0x540000 0x1740000>;
+					};
+					rwfs@1c80000 {
+						label = "rwfs";
+						reg = <0x1c80000 0x250000>;
+					};
+					section@1edf000{
+						label = "section";
+						reg = <0x1ed0000 0x130000>;
+					};
+				};
+			};
+
+			flash@1 {
+				compatible = "jedec,spi-nor";
+				reg = <1>;
+				partitions {
+					compatible = "fixed-partitions";
+					#address-cells = <1>;
+					#size-cells = <1>;
+					host-prime@0 {
+						label = "host-prime";
+						reg = <0x0 0x02000000>;
+					};
+					host-second@0 {
+						label = "host-second";
+						reg = <0x02000000 0x02000000>;
+					};
+				};
+			};
+		};
+
+		sram@d0000000 {
+			compatible = "mtd-ram";
+			reg = <0xd0000000 0x80000>;
+			bank-width = <1>;
+			erase-size =<1>;
+			partition@0 {
+				label = "host-reserved";
+				reg = <0x0 0x10000>;
+			};
+			partition@10000 {
+				label = "nvram";
+				reg = <0x10000 0x70000>;
+			};
+		};
+
+		srom@80fc0000 {
+			compatible = "hpe,gxp-srom", "simple-mfd", "syscon";
+			reg = <0x80fc0000 0x100>;
+		};
+
+		vrom@58000000 {
+			compatible = "mtd-ram";
+			bank-width = <4>;
+			reg = <0x58000000 0x4000000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			partition@0 {
+				label = "vrom-prime";
+				reg = <0x0 0x2000000>;
+			};
+			partition@2000000 {
+				label = "vrom-second";
+				reg = <0x2000000 0x2000000>;
+			};
+		};
+
+		i2cg: i2cg@c00000f8 {
+			compatible = "syscon";
+			reg = <0xc00000f8 0x08>;
+		};
+
+		i2c0: i2c@c0002000 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002000 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c1: i2c@c0002100 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002100 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c2: i2c@c0002200 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002200 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			24c02@50 {
+				compatible = "atmel,24c02";
+				pagesize = <8>;
+				reg = <0x50>;
+			};
+		};
+
+		i2c3: i2c@c0002300 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002300 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c4: i2c@c0002400 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002400 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c5: i2c@c0002500 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002500 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+		};
+
+		i2c6: i2c@c0002600 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002600 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c7: i2c@c0002700 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002700 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			psu1: psu@58 {
+				compatible = "hpe,gxp-psu";
+				reg = <0x58>;
+			};
+
+			psu2: psu@59 {
+				compatible = "hpe,gxp-psu";
+				reg = <0x59>;
+			};
+		};
+
+		i2c8: i2c@c0002800 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002800 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2c9: i2c@c0002900 {
+			compatible = "hpe,gxp-i2c";
+			reg = <0xc0002900 0x70>;
+			interrupts = <9>;
+			interrupt-parent = <&vic0>;
+			i2cg-handle = <&i2cg>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
+		i2cmux@4 {
+			compatible = "i2c-mux-reg";
+			i2c-parent = <&i2c4>;
+			reg = <0xd1000074 1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			i2c4@1 {
+				reg = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c4@3 {
+				reg = <3>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c4@4 {
+				reg = <4>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
+		i2cmux@6 {
+			compatible = "i2c-mux-reg";
+			i2c-parent = <&i2c6>;
+			reg = <0xd1000076 1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			i2c6@1 {
+				reg = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c6@2 {
+				reg = <2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c6@3 {
+				reg = <3>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c6@4 {
+				reg = <4>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+
+			i2c6@5 {
+				reg = <5>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
+		};
+
+		mdio0: mdio@c0004080 {
+			compatible = "hpe,gxp-umac-mdio";
+			reg = <0xc0004080 0x10>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			ext_phy0: ethernt-phy@0 {
+				compatible = "ethernet-phy-ieee802.3-c22";
+				phy-mode = "sgmii";
+				reg = <0>;
+			};
+		};
+
+		mdio1: mdio@c0005080 {
+			compatible = "hpe,gxp-umac-mdio";
+			reg = <0xc0005080 0x10>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			int_phy0: ethernt-phy@0 {
+				compatible = "ethernet-phy-ieee802.3-c22";
+				phy-mode = "gmii";
+				reg = <0>;
+			};
+			int_phy1: ethernt-phy@1 {
+				compatible = "ethernet-phy-ieee802.3-c22";
+				phy-mode = "gmii";
+				reg = <1>;
+			};
+		};
+
+		umac0: umac@c0004000 {
+			compatible = "hpe, gxp-umac";
+			reg = <0xc0004000 0x80>;
+			interrupts = <10>;
+			interrupt-parent = <&vic0>;
+			mac-address = [94 18 82 16 04 d8];
+			phy-handle = <&ext_phy0>;
+			int-phy-handle = <&int_phy0>;
+		};
+
+		umac1: umac@c0005000 {
+			compatible = "hpe, gxp-umac";
+			use-ncsi;
+			reg = <0xc0005000 0x80>;
+			interrupts = <11>;
+			interrupt-parent = <&vic0>;
+			mac-address = [94 18 82 16 04 d9];
+			phy-handle = <&int_phy1>;
+		};
+
+		kcs_conf: kcs_conf@80fc0430 {
+			compatible = "hpe,gxp-kcs-bmc-cfg", "simple-mfd", "syscon";
+			reg = <0x80fc0430 0x100>;
+		};
+
+		kcs_reg: kcs_reg@080fd0400 {
+			compatible = "hpe,gxp-kcs-bmc";
+			reg = <0x80fd0400 0x8>;
+			interrupts = <6>;
+			interrupt-parent = <&vic1>;
+			kcs_chan = <1>;
+			status = "okay";
+			kcs-bmc-cfg = <&kcs_conf>;
+		};
+
+		thumbnail: thumbnail@c0000500 {
+			compatible = "hpe,gxp-thumbnail";
+			reg = <0xc0000500 0x20>;
+			bits-per-pixel = <32>;
+			width = <800>;
+			height = <600>;
+		};
+
+		xreg: xreg@d1000000 {
+			compatible = "hpe,gxp-xreg", "simple-mfd", "syscon";
+			reg = <0xd1000000 0xFF>;
+			interrupts = <26>;
+			interrupt-parent = <&vic0>;
+			#gpio-cells = <2>;
+			gpio-line-names =
+			"", "", "", "", "", "", "POWER", "HEARTBEAT", "FAN1_INST", "FAN2_INST",
+			"FAN3_INST", "FAN4_INST", "FAN5_INST", "FAN6_INST", "FAN7_INST",
+			"FAN8_INST", "FAN9_INST", "FAN10_INST", "FAN11_INST", "FAN12_INST",
+			"FAN13_INST", "FAN14_INST", "FAN15_INST", "FAN16_INST", "FAN1_FAIL",
+			"FAN2_FAIL", "FAN3_FAIL", "FAN4_FAIL", "FAN5_FAIL", "FAN6_FAIL",
+			"FAN7_FAIL", "FAN8_FAIL", "FAN9_FAIL", "FAN10_FAIL", "FAN11_FAIL",
+			"FAN12_FAIL", "FAN13_FAIL", "FAN14_FAIL", "FAN15_FAIL", "FAN16_FAIL",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "IDENTIFY", "HEALTH_RED", "HEALTH_AMBER",
+			"POWER_BUTTON", "", "SIO_POWER_GOOD", "NMI_BUTTON", "RESET_BUTTON",
+			"SIO_S5", "SIO_ONCONTROL", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "";
+		};
+
+		fanctrl: fanctrl@c1000c00 {
+			compatible = "hpe,gxp-fan-ctrl";
+			reg = <0xc1000c00 0x200>;
+			xreg_handle = <&xreg>;
+			fn2_handle = <&fn2>;
+		};
+
+		fn2: fn2@80200000 {
+			compatible = "hpe,gxp-fn2", "simple-mfd", "syscon";
+			reg = <0x80200000 0x100000>;
+			xreg_handle = <&xreg>;
+			interrupts = <0>;
+			interrupt-parent = <&vic1>;
+			#gpio-cells = <2>;
+			gpio-line-names =
+			"POWER_OUT", "PS_PWROK", "PCIERST", "POST_COMPLETE", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "";
+			chif {
+				compatible = "hpe,gxp-chif";
+				interrupts = <12>;
+			};
+		};
+
+		csm: csm@80000000 {
+			compatible = "hpe,gxp-csm", "simple-mfd", "syscon";
+			reg = <0x80000000 0x400>;
+		};
+
+		gpio: gpio@0 {
+			compatible = "hpe,gxp-gpio";
+			#gpio-cells = <2>;
+			csm_handle = <&csm>;
+			vuhc0_handle = <&vuhc0>;
+			gpio-line-names =
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "RESET_OUT", "NMI_OUT", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "",
+			"", "", "", "", "", "", "", "", "", "";
+		};
+
+		leds: leds {
+			compatible = "gpio-leds";
+
+			power {
+				gpios = <&xreg 6 0>;
+				default-state = "off";
+			};
+
+			heartbeat {
+				gpios = <&xreg 7 0>;
+				default-state = "off";
+			};
+
+			identify {
+				gpios = <&xreg 56 0>;
+				default-state = "off";
+			};
+
+			health_red {
+				gpios = <&xreg 57 0>;
+				default-state = "off";
+			};
+
+			health_amber {
+				gpios = <&xreg 58 0>;
+				default-state = "off";
+			};
+		};
+
+		xreg_kyes: xreg_keys {
+			compatible = "gpio-keys-polled";
+			poll-interval = <100>;
+
+			IdButton {
+				label = "ID Button";
+				linux,code = <200>;
+				gpios = <&xreg 60 1>;
+			};
+		};
+
+		vuhc: vuhc {
+			compatible = "gpio-keys-polled";
+			poll-interval = <100>;
+
+			PortOwner@0 {
+				label = "Port Owner";
+				linux,code = <200>;
+				gpios = <&gpio 250 1>;
+			};
+
+			PortOwner@1 {
+				label = "Port Owner";
+				linux,code = <201>;
+				gpios = <&gpio 251 1>;
+			};
+		};
+
+		vuhc0: vuhc@80400080 {
+			compatible = "syscon";
+			reg = <0x80400000 0x80>;
+		};
+
+		udcg: udcg@80400800 {
+			compatible = "syscon";
+			reg = <0x80400800 0x200>;
+		};
+
+		udc0: udc@80401000 {
+			compatible = "hpe, gxp-udc";
+			reg = <0x80401000 0x1000>;
+			interrupts = <13>;
+			interrupt-parent = <&vic1>;
+			vdevnum = <0>;
+			fepnum = <7>;
+			udcg-handle = <&udcg>;
+		};
+
+		udc1: udc@80402000 {
+			compatible = "hpe, gxp-udc";
+			reg = <0x80402000 0x1000>;
+			interrupts = <13>;
+			interrupt-parent = <&vic1>;
+			vdevnum = <1>;
+			fepnum = <7>;
+			udcg-handle = <&udcg>;
+		};
+
+		coretemp: coretemp@c0000130 {
+			compatible = "hpe,gxp-coretemp";
+			reg = <0xc0000130 0x8>;
+		};
+
+		syspower: syspower {
+			compatible = "hpe,gxp-power";
+			psu_phandle = <&psu1>, <&psu2>;
+		};
+
+		peci: peci@80000400 {
+			compatible = "hpe,gxp-peci";
+			reg = <0x80000400 0x200>;
+			interrupts = <22>;
+			interrupt-parent = <&vic1>;
+		};
+	};
+
+	clocks {
+		osc: osc {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-output-names = "osc";
+			clock-frequency = <33333333>;
+		};
+
+		iopclk: iopclk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clocks = <&osc>;
+			clock-out-put-names = "iopclk";
+			clock-frequency = <400000000>;
+		};
+
+		memclk: memclk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clocks = <&osc>;
+			clock-out-put-names = "memclk";
+			clock-frequency = <800000000>;
+		};
+	};
+};
diff --git a/arch/arm/configs/gxp_defconfig b/arch/arm/configs/gxp_defconfig
new file mode 100644
index 000000000000..f37c6630e06d
--- /dev/null
+++ b/arch/arm/configs/gxp_defconfig
@@ -0,0 +1,243 @@
+CONFIG_KERNEL_XZ=y
+CONFIG_DEFAULT_HOSTNAME="gxp"
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_LOG_BUF_SHIFT=18
+CONFIG_CFS_BANDWIDTH=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLAB=y
+CONFIG_ARCH_MULTI_V6=y
+CONFIG_ARCH_HPE=y
+CONFIG_ARCH_HPE_GXP=y
+CONFIG_SECCOMP=y
+# CONFIG_ATAGS is not set
+CONFIG_ZBOOT_ROM_TEXT=0x0
+CONFIG_ZBOOT_ROM_BSS=0x0
+# CONFIG_SUSPEND is not set
+CONFIG_JUMP_LABEL=y
+# CONFIG_STRICT_KERNEL_RWX is not set
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_KSM=y
+CONFIG_CLEANCACHE=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_PACKET_DIAG=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_XFRM_USER=y
+CONFIG_XFRM_STATISTICS=y
+CONFIG_INET=y
+CONFIG_VLAN_8021Q=y
+CONFIG_NETLINK_DIAG=y
+CONFIG_NET_NCSI=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+CONFIG_MTD=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_PLATRAM=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_SPI_GXP_SPIFI=y
+CONFIG_BLK_DEV_NULL_BLK=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_NBD=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_EEPROM_AT24=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ALACRITECH is not set
+# CONFIG_NET_VENDOR_AMAZON is not set
+# CONFIG_NET_VENDOR_AQUANTIA is not set
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_AURORA is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_CADENCE is not set
+# CONFIG_NET_VENDOR_CAVIUM is not set
+# CONFIG_NET_VENDOR_CIRRUS is not set
+# CONFIG_NET_VENDOR_CORTINA is not set
+# CONFIG_NET_VENDOR_EZCHIP is not set
+# CONFIG_NET_VENDOR_FARADAY is not set
+# CONFIG_NET_VENDOR_GOOGLE is not set
+# CONFIG_NET_VENDOR_HISILICON is not set
+# CONFIG_NET_VENDOR_HUAWEI is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MELLANOX is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_MICROSEMI is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_NETRONOME is not set
+# CONFIG_NET_VENDOR_NI is not set
+# CONFIG_NET_VENDOR_QUALCOMM is not set
+# CONFIG_NET_VENDOR_RENESAS is not set
+# CONFIG_NET_VENDOR_ROCKER is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SOLARFLARE is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_SOCIONEXT is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_SYNOPSYS is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+# CONFIG_NET_VENDOR_XILINX is not set
+CONFIG_UMAC=y
+# CONFIG_USB_NET_DRIVERS is not set
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_LEDS is not set
+CONFIG_INPUT_EVDEV=y
+# CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GPIO=y
+CONFIG_KEYBOARD_GPIO_POLLED=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_SERIO_LIBPS2=y
+CONFIG_VT_HW_CONSOLE_BINDING=y
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=6
+CONFIG_SERIAL_8250_RUNTIME_UARTS=6
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_SHARE_IRQ=y
+CONFIG_SERIAL_8250_GXP_VUART=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_TTY_PRINTK=y
+CONFIG_IPMI_HANDLER=y
+CONFIG_IPMI_DEVICE_INTERFACE=y
+CONFIG_IPMI_SI=y
+CONFIG_IPMI_SSIF=y
+CONFIG_HPE_KCS_IPMI_BMC=y
+CONFIG_HW_RANDOM_TIMERIOMEM=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_GXP=y
+CONFIG_I2C_SLAVE=y
+CONFIG_I2C_SLAVE_EEPROM=y
+CONFIG_SPI=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_GXP=y
+CONFIG_SENSORS_EMC1403=y
+CONFIG_SENSORS_GXP_FAN_CTRL=y
+CONFIG_SENSORS_GXP_CORETEMP=y
+CONFIG_SENSORS_GXP_PSU=y
+CONFIG_SENSORS_GXP_POWER=y
+CONFIG_WATCHDOG=y
+CONFIG_GXP_WATCHDOG=y
+CONFIG_MFD_SYSCON=y
+CONFIG_FB=y
+CONFIG_FB_THUMBNAIL=y
+CONFIG_FB_SIMPLE=y
+CONFIG_USB=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_ROOT_HUB_TT=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GXP_UDC=y
+CONFIG_USB_CONFIGFS=y
+CONFIG_USB_CONFIGFS_SERIAL=y
+CONFIG_USB_CONFIGFS_ACM=y
+CONFIG_USB_CONFIGFS_OBEX=y
+CONFIG_USB_CONFIGFS_NCM=y
+CONFIG_USB_CONFIGFS_ECM=y
+CONFIG_USB_CONFIGFS_ECM_SUBSET=y
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_EEM=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_LB_SS=y
+CONFIG_USB_CONFIGFS_F_FS=y
+CONFIG_USB_CONFIGFS_F_HID=y
+CONFIG_USB_CONFIGFS_F_PRINTER=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_ONESHOT=y
+CONFIG_LEDS_TRIGGER_MTD=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_CPU=y
+CONFIG_LEDS_TRIGGER_GPIO=y
+CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
+CONFIG_LEDS_TRIGGER_TRANSIENT=y
+CONFIG_LEDS_TRIGGER_PANIC=y
+# CONFIG_VIRTIO_MENU is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_HPE_GXP_XREG=y
+CONFIG_HPE_GXP_FN2=y
+CONFIG_HPE_GXP_CSM=y
+CONFIG_HPE_GXP_SROM=y
+CONFIG_FANOTIFY=y
+CONFIG_OVERLAY_FS=y
+CONFIG_OVERLAY_FS_REDIRECT_DIR=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_JFFS2_FS=y
+# CONFIG_JFFS2_FS_WRITEBUFFER is not set
+CONFIG_JFFS2_SUMMARY=y
+CONFIG_JFFS2_FS_XATTR=y
+# CONFIG_JFFS2_FS_POSIX_ACL is not set
+# CONFIG_JFFS2_FS_SECURITY is not set
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_XZ=y
+CONFIG_SQUASHFS_4K_DEVBLK_SIZE=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_CRYPTO_CCM=y
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_ARC4=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_CRYPTO_ZSTD=y
+CONFIG_CRYPTO_USER_API_HASH=y
+# CONFIG_CRYPTO_HW is not set
+CONFIG_CRC16=y
+# CONFIG_XZ_DEC_ARM is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
+CONFIG_DMA_API_DEBUG=y
+CONFIG_PRINTK_TIME=y
+CONFIG_BOOT_PRINTK_DELAY=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_DEBUG_INFO=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_PANIC_ON_OOPS=y
+CONFIG_FUNCTION_PROFILER=y
+CONFIG_STACK_TRACER=y
+CONFIG_SCHED_TRACER=y
+CONFIG_STRICT_DEVMEM=y
+CONFIG_DEBUG_USER=y
+CONFIG_DEBUG_LL=y
+CONFIG_DEBUG_LL_UART_8250=y
+CONFIG_DEBUG_UART_PHYS=0xC00000F0
+CONFIG_DEBUG_UART_VIRT=0xF00000F0
+CONFIG_DEBUG_UART_8250_SHIFT=0
+CONFIG_EARLY_PRINTK=y
+CONFIG_TEST_KSTRTOX=y
diff --git a/arch/arm/mach-hpe/Kconfig b/arch/arm/mach-hpe/Kconfig
new file mode 100644
index 000000000000..9b27f97c6536
--- /dev/null
+++ b/arch/arm/mach-hpe/Kconfig
@@ -0,0 +1,20 @@
+menuconfig ARCH_HPE
+	bool "HPE SoC support"
+	help
+	  This enables support for HPE ARM based SoC chips
+if ARCH_HPE
+
+config ARCH_HPE_GXP
+	bool "HPE GXP SoC"
+	select ARM_VIC
+	select PINCTRL
+	select IRQ_DOMAIN
+	select GENERIC_IRQ_CHIP
+	select MULTI_IRQ_HANDLER
+	select SPARSE_IRQ
+	select CLKSRC_MMIO
+	depends on ARCH_MULTI_V7
+	help
+	  Support for GXP SoCs
+
+endif
diff --git a/arch/arm/mach-hpe/Makefile b/arch/arm/mach-hpe/Makefile
new file mode 100644
index 000000000000..8b0a91234df4
--- /dev/null
+++ b/arch/arm/mach-hpe/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_HPE_GXP) += gxp.o
diff --git a/arch/arm/mach-hpe/gxp.c b/arch/arm/mach-hpe/gxp.c
new file mode 100644
index 000000000000..b58f25fbae5a
--- /dev/null
+++ b/arch/arm/mach-hpe/gxp.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2022 Hewlett-Packard Enterprise Development Company, L.P.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include <linux/init.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+
+#define IOP_REGS_PHYS_BASE 0xc0000000
+#define IOP_REGS_VIRT_BASE 0xf0000000
+#define IOP_REGS_SIZE (240*SZ_1M)
+
+#define IOP_EHCI_USBCMD 0x0efe0010
+
+static struct map_desc gxp_io_desc[] __initdata = {
+	{
+	.virtual	= (unsigned long)IOP_REGS_VIRT_BASE,
+	.pfn		= __phys_to_pfn(IOP_REGS_PHYS_BASE),
+	.length		= IOP_REGS_SIZE,
+	.type		= MT_DEVICE,
+	},
+};
+
+void __init gxp_map_io(void)
+{
+	iotable_init(gxp_io_desc, ARRAY_SIZE(gxp_io_desc));
+}
+
+static void __init gxp_dt_init(void)
+{
+	//reset EHCI host controller for clear start
+	__raw_writel(0x00080002,
+		(void __iomem *)(IOP_REGS_VIRT_BASE + IOP_EHCI_USBCMD));
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static void gxp_restart(enum reboot_mode mode, const char *cmd)
+{
+	pr_info("gpx restart");
+	__raw_writel(1, (void __iomem *) IOP_REGS_VIRT_BASE);
+}
+
+static const char * const gxp_board_dt_compat[] = {
+	"HPE,GXP",
+	NULL,
+};
+
+DT_MACHINE_START(GXP_DT, "HPE GXP")
+	.init_machine	= gxp_dt_init,
+	.map_io		= gxp_map_io,
+	.restart	= gxp_restart,
+	.dt_compat	= gxp_board_dt_compat,
+MACHINE_END
-- 
2.17.1