Merge tag 'arm-newsoc-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM Nuvoton WPCM450 platform support from Arnd Bergmann:
 "The Nuvoton WPCM450 BMC is an older chip based on the ARM926 CPU core
  that remains in use on Supermicro X9 server boards among others.

  Support gets added for a particular server board using this SoC along
  with the basic platform bringup.

  As the platform is a predecessor to the npcm7xx platform we already
  support, it is added to the same directory, despite using a different
  name. It also seems to be related to the older w90x900/nuc9xx platform
  that was removed last year"

* tag 'arm-newsoc-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: config: Add WPCM to multi v5
  MAINTAINERS: Add entry for Nuvoton WPCM450
  ARM: dts: Add devicetree for Supermicro X9SCi-LN4F based on WPCM450
  ARM: dts: Add devicetree for Nuvoton WPCM450 BMC chip
  watchdog: npcm: Add support for WPCM450
  ARM: npcm: Introduce Nuvoton WPCM450 SoC
  dt-bindings: watchdog: npcm: Add nuvoton,wpcm450-wdt
  dt-bindings: arm: npcm: Add nuvoton,wpcm450 compatible string
  dt-bindings: vendor-prefixes: Add Supermicro
  ARM: dts: Add board-specific compatible string to npcm750-evb devicetree
  dt-bindings: arm: Convert nuvoton,npcm750 binding to YAML

8 files changed, 147 insertions, 2 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index b945d6f14aa7..f8f09c5066e7 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -333,6 +333,8 @@ dtb-$(CONFIG_ARCH_LPC18XX) += \
 dtb-$(CONFIG_ARCH_LPC32XX) += \
 	lpc3250-ea3250.dtb \
 	lpc3250-phy3250.dtb
+dtb-$(CONFIG_ARCH_WPCM450) += \
+	nuvoton-wpcm450-supermicro-x9sci-ln4f.dtb
 dtb-$(CONFIG_ARCH_NPCM7XX) += \
 	nuvoton-npcm730-gsj.dtb \
 	nuvoton-npcm730-gbs.dtb \
diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
index 9f13d08f5804..dea3dbc4a6a5 100644
--- a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
@@ -9,7 +9,7 @@
 
 / {
 	model = "Nuvoton npcm750 Development Board (Device Tree)";
-	compatible = "nuvoton,npcm750";
+	compatible = "nuvoton,npcm750-evb", "nuvoton,npcm750";
 
 	aliases {
 		ethernet2 = &gmac0;
diff --git a/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts b/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts
new file mode 100644
index 000000000000..83f27fbf4e93
--- /dev/null
+++ b/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+// Copyright 2021 Jonathan Neuschäfer
+
+/dts-v1/;
+
+/* The last 16 MiB are dedicated to the GPU */
+/memreserve/ 0x07000000 0x01000000;
+
+#include "nuvoton-wpcm450.dtsi"
+
+/ {
+	model = "Supermicro X9SCi-LN4F BMC";
+	compatible = "supermicro,x9sci-ln4f-bmc", "nuvoton,wpcm450";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0 0x08000000>; /* 128 MiB */
+	};
+};
+
+&serial0 {
+	/*
+	 * Debug serial port. TX is exposed on the right pad of unpopulated
+	 * resistor R1247, RX on the right pad of R1162.
+	 */
+	status = "okay";
+};
+
+&serial1 {
+	/* "Serial over LAN" port. Connected to ttyS2 of the host system. */
+	status = "okay";
+};
+
+&watchdog0 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
new file mode 100644
index 000000000000..d7cbeb187484
--- /dev/null
+++ b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+// Copyright 2021 Jonathan Neuschäfer
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	compatible = "nuvoton,wpcm450";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			compatible = "arm,arm926ej-s";
+			device_type = "cpu";
+			reg = <0>;
+		};
+	};
+
+	clk24m: clock-24mhz {
+		/* 24 MHz dummy clock */
+		compatible = "fixed-clock";
+		clock-frequency = <24000000>;
+		#clock-cells = <0>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		interrupt-parent = <&aic>;
+		ranges;
+
+		serial0: serial@b8000000 {
+			compatible = "nuvoton,wpcm450-uart";
+			reg = <0xb8000000 0x20>;
+			reg-shift = <2>;
+			interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk24m>;
+			status = "disabled";
+		};
+
+		serial1: serial@b8000100 {
+			compatible = "nuvoton,wpcm450-uart";
+			reg = <0xb8000100 0x20>;
+			reg-shift = <2>;
+			interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk24m>;
+			status = "disabled";
+		};
+
+		timer0: timer@b8001000 {
+			compatible = "nuvoton,wpcm450-timer";
+			interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+			reg = <0xb8001000 0x1c>;
+			clocks = <&clk24m>;
+		};
+
+		watchdog0: watchdog@b800101c {
+			compatible = "nuvoton,wpcm450-wdt";
+			interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
+			reg = <0xb800101c 0x4>;
+			clocks = <&clk24m>;
+			status = "disabled";
+		};
+
+		aic: interrupt-controller@b8002000 {
+			compatible = "nuvoton,wpcm450-aic";
+			reg = <0xb8002000 0x1000>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+};
diff --git a/arch/arm/configs/multi_v5_defconfig b/arch/arm/configs/multi_v5_defconfig
index 9f862b21b40a..80a3ae02d759 100644
--- a/arch/arm/configs/multi_v5_defconfig
+++ b/arch/arm/configs/multi_v5_defconfig
@@ -33,6 +33,8 @@ CONFIG_SOC_IMX25=y
 CONFIG_SOC_IMX27=y
 CONFIG_ARCH_MVEBU=y
 CONFIG_MACH_KIRKWOOD=y
+CONFIG_ARCH_NPCM=y
+CONFIG_ARCH_WPCM450=y
 CONFIG_ARCH_ORION5X=y
 CONFIG_MACH_DB88F5281=y
 CONFIG_MACH_RD88F5182=y
@@ -178,6 +180,7 @@ CONFIG_THERMAL=y
 CONFIG_KIRKWOOD_THERMAL=y
 CONFIG_AT91SAM9X_WATCHDOG=y
 CONFIG_ORION_WATCHDOG=y
+CONFIG_NPCM7XX_WATCHDOG=y
 CONFIG_IMX2_WDT=y
 CONFIG_MFD_ATMEL_HLCDC=y
 # CONFIG_ABX500_CORE is not set
diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig
index 7f7002dc2b21..658c8efb4ca1 100644
--- a/arch/arm/mach-npcm/Kconfig
+++ b/arch/arm/mach-npcm/Kconfig
@@ -1,11 +1,21 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig ARCH_NPCM
 	bool "Nuvoton NPCM Architecture"
-	depends on ARCH_MULTI_V7
+	depends on ARCH_MULTI_V5 || ARCH_MULTI_V7
 	select PINCTRL
 
 if ARCH_NPCM
 
+config ARCH_WPCM450
+	bool "Support for WPCM450 BMC (Hermon)"
+	depends on ARCH_MULTI_V5
+	select CPU_ARM926T
+	select NPCM7XX_TIMER
+	help
+	  General support for WPCM450 BMC (Hermon).
+
+	  Winbond/Nuvoton WPCM450 BMC based on the ARM926EJ-S.
+
 config ARCH_NPCM7XX
 	bool "Support for NPCM7xx BMC (Poleg)"
 	depends on ARCH_MULTI_V7
diff --git a/arch/arm/mach-npcm/Makefile b/arch/arm/mach-npcm/Makefile
index 1bc3a70bfab8..8d61fcd42fb1 100644
--- a/arch/arm/mach-npcm/Makefile
+++ b/arch/arm/mach-npcm/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 AFLAGS_headsmp.o		+= -march=armv7-a
 
+obj-$(CONFIG_ARCH_WPCM450)	+= wpcm450.o
 obj-$(CONFIG_ARCH_NPCM7XX)	+= npcm7xx.o
 obj-$(CONFIG_SMP)		+= platsmp.o headsmp.o
diff --git a/arch/arm/mach-npcm/wpcm450.c b/arch/arm/mach-npcm/wpcm450.c
new file mode 100644
index 000000000000..f17b3dab45af
--- /dev/null
+++ b/arch/arm/mach-npcm/wpcm450.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2021 Jonathan Neuschäfer
+
+#include <asm/mach/arch.h>
+
+static const char *const wpcm450_dt_match[] = {
+	"nuvoton,wpcm450",
+	NULL
+};
+
+DT_MACHINE_START(WPCM450_DT, "WPCM450 chip")
+	.dt_compat	= wpcm450_dt_match,
+MACHINE_END