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ARM: platform support for Nuvoton WPCM450

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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.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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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
This commit is contained in:
Linus Torvalds 2021-04-26 12:25:29 -07:00
commit 6b0fbc540c
14 changed files with 190 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/devicetree/bindings/arm/npcm/npcm.txt
View File

@ -1,6 +0,0 @@
NPCM Platforms Device Tree Bindings
-----------------------------------
NPCM750 SoC
Required root node properties:
- compatible = "nuvoton,npcm750";

29
Documentation/devicetree/bindings/arm/npcm/npcm.yaml Normal file
View File

@ -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

2
Documentation/devicetree/bindings/vendor-prefixes.yaml
View File

@ -1091,6 +1091,8 @@ patternProperties:
description: Shenzhen Sunchip Technology Co., Ltd
"^SUNW,.*":
description: Sun Microsystems, Inc
"^supermicro,.*":
description: Super Micro Computer, Inc.
"^silvaco,.*":
description: Silvaco, Inc.
"^swir,.*":

3
Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt
View File

@ -5,7 +5,8 @@ The watchdog supports a pre-timeout interrupt that fires 10ms before the
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.

9
MAINTAINERS
View File

@ -2214,6 +2214,15 @@ F: drivers/*/*npcm*
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

2
arch/arm/boot/dts/Makefile
View File

@ -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 \

2
arch/arm/boot/dts/nuvoton-npcm750-evb.dts
View File

@ -9,7 +9,7 @@
/ {
model = "Nuvoton npcm750 Development Board (Device Tree)";
compatible = "nuvoton,npcm750";
compatible = "nuvoton,npcm750-evb", "nuvoton,npcm750";
aliases {
ethernet2 = &gmac0;

40
arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts Normal file
View File

@ -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";
};

76
arch/arm/boot/dts/nuvoton-wpcm450.dtsi Normal file
View File

@ -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>;
};
};
};

3
arch/arm/configs/multi_v5_defconfig
View File

@ -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

12
arch/arm/mach-npcm/Kconfig
View File

@ -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

1
arch/arm/mach-npcm/Makefile
View File

@ -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

13
arch/arm/mach-npcm/wpcm450.c Normal file
View File

@ -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

1
drivers/watchdog/npcm_wdt.c
View File

@ -229,6 +229,7 @@ static int npcm_wdt_probe(struct platform_device *pdev)
#ifdef CONFIG_OF
static const struct of_device_id npcm_wdt_match[] = {
{.compatible = "nuvoton,wpcm450-wdt"},
{.compatible = "nuvoton,npcm750-wdt"},
{},
};