Merge branch 'hpe/gxp-soc' into arm/late

Patch series from Nick Hawkins:

"The GXP is the HPE BMC SoC that is used in the majority of HPE current
 generation servers. Traditionally the asic will last multiple
 generations of server before being replaced.

 Info about SoC:

  HPE GXP is the name of the HPE Soc. This SoC is used to implement many
  BMC features at HPE. It supports ARMv7 architecture based on the Cortex
  A9 core. It is capable of using an AXI bus to which a memory controller
  is attached. It has multiple SPI interfaces to connect boot flash and
  BIOS flash. It uses a 10/100/1000 MAC for network connectivity. It has
  multiple i2c engines to drive connectivity with a host infrastructure.
  The initial patches enable the watchdog and timer enabling the host to
  be able to boot."

* hpe/gxp-soc:
  MAINTAINERS: Introduce HPE GXP Architecture
  ARM: dts: Introduce HPE GXP Device tree
  dt-bindings: arm: hpe: add GXP Support
  dt-bindings: timer: hpe,gxp-timer: Add HPE GXP Timer and Watchdog
  clocksource/drivers/timer-gxp: Add HPE GXP Timer
  watchdog: hpe-wdt: Introduce HPE GXP Watchdog
  ARM: configs: multi_v7_defconfig: Add HPE GXP ARCH
  ARM: hpe: Introduce the HPE GXP architecture

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

9 files changed, 201 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 903165a400a7..340c30e954ca 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -550,6 +550,8 @@ source "arch/arm/mach-highbank/Kconfig"
 
 source "arch/arm/mach-hisi/Kconfig"
 
+source "arch/arm/mach-hpe/Kconfig"
+
 source "arch/arm/mach-imx/Kconfig"
 
 source "arch/arm/mach-iop32x/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 2c5f9b74fb91..c4b0e9802864 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -179,6 +179,7 @@ machine-$(CONFIG_ARCH_FOOTBRIDGE)	+= footbridge
 machine-$(CONFIG_ARCH_GEMINI)		+= gemini
 machine-$(CONFIG_ARCH_HIGHBANK)		+= highbank
 machine-$(CONFIG_ARCH_HISI)		+= hisi
+machine-$(CONFIG_ARCH_HPE)		+= hpe
 machine-$(CONFIG_ARCH_IOP32X)		+= iop32x
 machine-$(CONFIG_ARCH_IXP4XX)		+= ixp4xx
 machine-$(CONFIG_ARCH_KEYSTONE)		+= keystone
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index edfbedaa6168..75269ec24834 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -259,6 +259,8 @@ dtb-$(CONFIG_ARCH_HISI) += \
 	hi3519-demb.dtb
 dtb-$(CONFIG_ARCH_HIX5HD2) += \
 	hisi-x5hd2-dkb.dtb
+dtb-$(CONFIG_ARCH_HPE_GXP) += \
+	hpe-bmc-dl360gen10.dtb
 dtb-$(CONFIG_ARCH_INTEGRATOR) += \
 	integratorap.dtb \
 	integratorap-im-pd1.dtb \
diff --git a/arch/arm/boot/dts/hpe-bmc-dl360gen10.dts b/arch/arm/boot/dts/hpe-bmc-dl360gen10.dts
new file mode 100644
index 000000000000..3a7382ce40ef
--- /dev/null
+++ b/arch/arm/boot/dts/hpe-bmc-dl360gen10.dts
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree file for HPE DL360Gen10
+ */
+
+/include/ "hpe-gxp.dtsi"
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "hpe,gxp-dl360gen10", "hpe,gxp";
+	model = "Hewlett Packard Enterprise ProLiant dl360 Gen10";
+
+	aliases {
+		serial0 = &uartc;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x20000000>;
+	};
+};
diff --git a/arch/arm/boot/dts/hpe-gxp.dtsi b/arch/arm/boot/dts/hpe-gxp.dtsi
new file mode 100644
index 000000000000..cf735b3c4f35
--- /dev/null
+++ b/arch/arm/boot/dts/hpe-gxp.dtsi
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree file for HPE GXP
+ */
+
+/dts-v1/;
+/ {
+	model = "Hewlett Packard Enterprise GXP BMC";
+	compatible = "hpe,gxp";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			compatible = "arm,cortex-a9";
+			reg = <0>;
+			device_type = "cpu";
+			next-level-cache = <&L2>;
+		};
+	};
+
+	clocks {
+		pll: clock-0 {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <1600000000>;
+		};
+
+		iopclk: clock-1 {
+			compatible = "fixed-factor-clock";
+			#clock-cells = <0>;
+			clock-div = <4>;
+			clock-mult = <1>;
+			clocks = <&pll>;
+		};
+	};
+
+	axi {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		dma-ranges;
+
+		L2: cache-controller@b0040000 {
+			compatible = "arm,pl310-cache";
+			reg = <0xb0040000 0x1000>;
+			cache-unified;
+			cache-level = <2>;
+		};
+
+		ahb@c0000000 {
+			compatible = "simple-bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0xc0000000 0x30000000>;
+			dma-ranges;
+
+			vic0: interrupt-controller@eff0000 {
+				compatible = "arm,pl192-vic";
+				reg = <0xeff0000 0x1000>;
+				interrupt-controller;
+				#interrupt-cells = <1>;
+			};
+
+			vic1: interrupt-controller@80f00000 {
+				compatible = "arm,pl192-vic";
+				reg = <0x80f00000 0x1000>;
+				interrupt-controller;
+				#interrupt-cells = <1>;
+			};
+
+			uarta: serial@e0 {
+				compatible = "ns16550a";
+				reg = <0xe0 0x8>;
+				interrupts = <17>;
+				interrupt-parent = <&vic0>;
+				clock-frequency = <1846153>;
+				reg-shift = <0>;
+			};
+
+			uartb: serial@e8 {
+				compatible = "ns16550a";
+				reg = <0xe8 0x8>;
+				interrupts = <18>;
+				interrupt-parent = <&vic0>;
+				clock-frequency = <1846153>;
+				reg-shift = <0>;
+			};
+
+			uartc: serial@f0 {
+				compatible = "ns16550a";
+				reg = <0xf0 0x8>;
+				interrupts = <19>;
+				interrupt-parent = <&vic0>;
+				clock-frequency = <1846153>;
+				reg-shift = <0>;
+			};
+
+			usb0: usb@efe0000 {
+				compatible = "hpe,gxp-ehci", "generic-ehci";
+				reg = <0xefe0000 0x100>;
+				interrupts = <7>;
+				interrupt-parent = <&vic0>;
+			};
+
+			st: timer@80 {
+				compatible = "hpe,gxp-timer";
+				reg = <0x80 0x16>;
+				interrupts = <0>;
+				interrupt-parent = <&vic0>;
+				clocks = <&iopclk>;
+				clock-names = "iop";
+			};
+
+			usb1: usb@efe0100 {
+				compatible = "hpe,gxp-ohci", "generic-ohci";
+				reg = <0xefe0100 0x110>;
+				interrupts = <6>;
+				interrupt-parent = <&vic0>;
+			};
+		};
+	};
+};
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 547918170f1f..f5ed9960aefb 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -43,6 +43,8 @@ CONFIG_ARCH_HI3xxx=y
 CONFIG_ARCH_HIP01=y
 CONFIG_ARCH_HIP04=y
 CONFIG_ARCH_HIX5HD2=y
+CONFIG_ARCH_HPE=y
+CONFIG_ARCH_HPE_GXP=y
 CONFIG_ARCH_MXC=y
 CONFIG_SOC_IMX50=y
 CONFIG_SOC_IMX51=y
@@ -563,6 +565,7 @@ CONFIG_BCM47XX_WDT=y
 CONFIG_BCM2835_WDT=y
 CONFIG_BCM_KONA_WDT=y
 CONFIG_BCM7038_WDT=m
+CONFIG_GXP_WATCHDOG=y
 CONFIG_BCMA_HOST_SOC=y
 CONFIG_BCMA_DRIVER_GMAC_CMN=y
 CONFIG_BCMA_DRIVER_GPIO=y
diff --git a/arch/arm/mach-hpe/Kconfig b/arch/arm/mach-hpe/Kconfig
new file mode 100644
index 000000000000..3372bbf38d38
--- /dev/null
+++ b/arch/arm/mach-hpe/Kconfig
@@ -0,0 +1,23 @@
+menuconfig ARCH_HPE
+	bool "HPE SoC support"
+	depends on ARCH_MULTI_V7
+	help
+	  This enables support for HPE ARM based BMC chips.
+if ARCH_HPE
+
+config ARCH_HPE_GXP
+	bool "HPE GXP SoC"
+	depends on ARCH_MULTI_V7
+	select ARM_VIC
+	select GENERIC_IRQ_CHIP
+	select CLKSRC_MMIO
+	help
+	  HPE GXP is the name of the HPE Soc. This SoC is used to implement many
+	  BMC features at HPE. It supports ARMv7 architecture based on the Cortex
+	  A9 core. It is capable of using an AXI bus to which a memory controller
+	  is attached. It has multiple SPI interfaces to connect boot flash and
+	  BIOS flash. It uses a 10/100/1000 MAC for network connectivity. It
+	  has multiple i2c engines to drive connectivity with a host
+	  infrastructure.
+
+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..ef3341373006
--- /dev/null
+++ b/arch/arm/mach-hpe/gxp.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2022 Hewlett-Packard Enterprise Development Company, L.P. */
+
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+
+static const char * const gxp_board_dt_compat[] = {
+	"hpe,gxp",
+	NULL,
+};
+
+DT_MACHINE_START(GXP_DT, "HPE GXP")
+	.dt_compat	= gxp_board_dt_compat,
+	.l2c_aux_val = 0,
+	.l2c_aux_mask = ~0,
+MACHINE_END