Merge tag 'bmc-5.13-wpcm450' of git://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc into arm/newsoc
Nuvoton WPCM450 BMC SoC
This adds basic support for the Nuvoton WPCM450 BMC SoC. It's an older
SoC but still commonly found on eBay, mostly in Supermicro X9 server
boards.
Third-party documentation is available at: https://github.com/neuschaefer/wpcm450/wiki
The code has been contributed by Jonathan Neuschäfer who has also
stepped forward to maintain the soc.
* tag 'bmc-5.13-wpcm450' of git://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc:
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
Link: https://lore.kernel.org/r/CACPK8Xdj20TcJckH8fx757ACa4hT4j3bZEctT0Przjv8XJd7KA@mail.gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.txt b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
deleted file mode 100644
index 2d87d9e..0000000
--- a/Documentation/devicetree/bindings/arm/npcm/npcm.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-NPCM Platforms Device Tree Bindings
------------------------------------
-NPCM750 SoC
-Required root node properties:
- - compatible = "nuvoton,npcm750";
-
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.yaml b/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
new file mode 100644
index 0000000..95e5137
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/npcm/npcm.yaml
@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/npcm/npcm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NPCM Platforms Device Tree Bindings
+
+maintainers:
+ - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+
+properties:
+ $nodename:
+ const: '/'
+ compatible:
+ oneOf:
+ - description: WPCM450 based boards
+ items:
+ - enum:
+ - supermicro,x9sci-ln4f-bmc # Supermicro X9SCI-LN4F server's BMC
+ - const: nuvoton,wpcm450
+
+ - description: NPCM750 based boards
+ items:
+ - enum:
+ - nuvoton,npcm750-evb # NPCM750 evaluation board
+ - const: nuvoton,npcm750
+
+additionalProperties: true
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index f6064d8..ec6d6cc 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1085,6 +1085,8 @@
description: Shenzhen Sunchip Technology Co., Ltd
"^SUNW,.*":
description: Sun Microsystems, Inc
+ "^supermicro,.*":
+ description: Super Micro Computer, Inc.
"^silvaco,.*":
description: Silvaco, Inc.
"^swir,.*":
diff --git a/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
index 6d59300..9059f54 100644
--- a/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
@@ -5,7 +5,8 @@
expiry.
Required properties:
-- compatible : "nuvoton,npcm750-wdt" for NPCM750 (Poleg).
+- compatible : "nuvoton,npcm750-wdt" for NPCM750 (Poleg), or
+ "nuvoton,wpcm450-wdt" for WPCM450 (Hermon).
- reg : Offset and length of the register set for the device.
- interrupts : Contain the timer interrupt with flags for
falling edge.
diff --git a/MAINTAINERS b/MAINTAINERS
index d92f85c..661770e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2194,6 +2194,15 @@
F: drivers/*/*/*npcm*
F: include/dt-bindings/clock/nuvoton,npcm7xx-clock.h
+ARM/NUVOTON WPCM450 ARCHITECTURE
+M: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+L: openbmc@lists.ozlabs.org (moderated for non-subscribers)
+S: Maintained
+F: Documentation/devicetree/bindings/*/*wpcm*
+F: arch/arm/boot/dts/nuvoton-wpcm450*
+F: arch/arm/mach-npcm/wpcm450.c
+F: drivers/*/*wpcm*
+
ARM/OPENMOKO NEO FREERUNNER (GTA02) MACHINE SUPPORT
L: openmoko-kernel@lists.openmoko.org (subscribers-only)
S: Orphan
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 8e5d4ab..5a9d99d 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -333,6 +333,8 @@
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-kudo.dtb \
diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
index 9f13d08..dea3dbc 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 0000000..83f27fb
--- /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 0000000..d7cbeb1
--- /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 9f862b2..80a3ae0 100644
--- a/arch/arm/configs/multi_v5_defconfig
+++ b/arch/arm/configs/multi_v5_defconfig
@@ -33,6 +33,8 @@
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_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 7f7002d..658c8ef 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 1bc3a70..8d61fcd 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 0000000..f17b3da
--- /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
diff --git a/drivers/watchdog/npcm_wdt.c b/drivers/watchdog/npcm_wdt.c
index 765577f..28a24ca 100644
--- a/drivers/watchdog/npcm_wdt.c
+++ b/drivers/watchdog/npcm_wdt.c
@@ -229,6 +229,7 @@
#ifdef CONFIG_OF
static const struct of_device_id npcm_wdt_match[] = {
+ {.compatible = "nuvoton,wpcm450-wdt"},
{.compatible = "nuvoton,npcm750-wdt"},
{},
};
