[PATCH v5 0/3] arm: npcm: add basic support for Nuvoton BMCs

[PATCH v5 0/3] arm: npcm: add basic support for Nuvoton BMCs

[Brendan Higgins]

Addressed comments from:
  - kbuild robot: https://www.spinics.net/lists/arm-kernel/msg605356.html
  - kbuild robot: https://www.spinics.net/lists/arm-kernel/msg605325.html

Changes since previous update:
  - Addressed some minor issues caught by build bot, no structural changes.
  - Changes status of NPCM MAINTAINERS entry to Supported since Avi and Tomer
    are paid to do this.
  - No changes to device tree since v4

Changes have been tested on the NPCM750 evaluation board.
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[PATCH v5 1/3] arm: npcm: add basic support for Nuvoton BMCs

[Brendan Higgins]

Adds basic support for the Nuvoton NPCM750 BMC.

Signed-off-by: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
---
 arch/arm/Kconfig             |  2 +
 arch/arm/Makefile            |  1 +
 arch/arm/mach-npcm/Kconfig   | 48 ++++++++++++++++++++++++
 arch/arm/mach-npcm/Makefile  |  3 ++
 arch/arm/mach-npcm/headsmp.S | 17 +++++++++
 arch/arm/mach-npcm/npcm7xx.c | 34 +++++++++++++++++
 arch/arm/mach-npcm/platsmp.c | 88 ++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 193 insertions(+)
 create mode 100644 arch/arm/mach-npcm/Kconfig
 create mode 100644 arch/arm/mach-npcm/Makefile
 create mode 100644 arch/arm/mach-npcm/headsmp.S
 create mode 100644 arch/arm/mach-npcm/npcm7xx.c
 create mode 100644 arch/arm/mach-npcm/platsmp.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 61a0cb15067e..05543f1cfbde 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -782,6 +782,8 @@ source "arch/arm/mach-netx/Kconfig"
 
 source "arch/arm/mach-nomadik/Kconfig"
 
+source "arch/arm/mach-npcm/Kconfig"
+
 source "arch/arm/mach-nspire/Kconfig"
 
 source "arch/arm/plat-omap/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 47d3a1ab08d2..60ca50c7d762 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -191,6 +191,7 @@ machine-$(CONFIG_ARCH_MEDIATEK)		+= mediatek
 machine-$(CONFIG_ARCH_MXS)		+= mxs
 machine-$(CONFIG_ARCH_NETX)		+= netx
 machine-$(CONFIG_ARCH_NOMADIK)		+= nomadik
+machine-$(CONFIG_ARCH_NPCM)		+= npcm
 machine-$(CONFIG_ARCH_NSPIRE)		+= nspire
 machine-$(CONFIG_ARCH_OXNAS)		+= oxnas
 machine-$(CONFIG_ARCH_OMAP1)		+= omap1
diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig
new file mode 100644
index 000000000000..21dfa8ce828f
--- /dev/null
+++ b/arch/arm/mach-npcm/Kconfig
@@ -0,0 +1,48 @@
+menuconfig ARCH_NPCM
+	bool "Nuvoton NPCM Architecture"
+	select ARCH_REQUIRE_GPIOLIB
+	select USE_OF
+	select PINCTRL
+	select PINCTRL_NPCM7XX
+
+if ARCH_NPCM
+
+comment "NPCMX50 CPU type"
+
+config CPU_NPCM750
+	depends on ARCH_NPCM && ARCH_MULTI_V7
+	bool "Support for NPCM750 BMC CPU (Poleg)"
+	select CACHE_L2X0
+	select CPU_V7
+	select ARM_GIC
+	select HAVE_SMP
+	select SMP
+	select SMP_ON_UP
+	select HAVE_ARM_SCU
+	select HAVE_ARM_TWD if SMP
+	select ARM_ERRATA_720789
+	select ARM_ERRATA_754322
+	select ARM_ERRATA_764369
+	select ARM_ERRATA_794072
+	select PL310_ERRATA_588369
+	select PL310_ERRATA_727915
+	select USB_EHCI_ROOT_HUB_TT
+	select USB_ARCH_HAS_HCD
+	select USB_ARCH_HAS_EHCI
+	select USB_EHCI_HCD
+	select USB_ARCH_HAS_OHCI
+	select USB_OHCI_HCD
+	select USB
+	select FIQ
+	select CPU_USE_DOMAINS
+	select GENERIC_CLOCKEVENTS
+	select CLKDEV_LOOKUP
+	select COMMON_CLK if OF
+	select NPCM750_TIMER
+	select MFD_SYSCON
+	help
+	  Support for NPCM750 BMC CPU (Poleg).
+
+	  Nuvoton NPCM750 BMC based on the Cortex A9.
+
+endif
diff --git a/arch/arm/mach-npcm/Makefile b/arch/arm/mach-npcm/Makefile
new file mode 100644
index 000000000000..78416055b854
--- /dev/null
+++ b/arch/arm/mach-npcm/Makefile
@@ -0,0 +1,3 @@
+AFLAGS_headsmp.o		+= -march=armv7-a
+
+obj-$(CONFIG_CPU_NPCM750)	+= npcm7xx.o platsmp.o headsmp.o
diff --git a/arch/arm/mach-npcm/headsmp.S b/arch/arm/mach-npcm/headsmp.S
new file mode 100644
index 000000000000..9fccbbd49ed4
--- /dev/null
+++ b/arch/arm/mach-npcm/headsmp.S
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2017 Google, Inc.
+ *
+ * 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/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+
+ENTRY(npcm7xx_secondary_startup)
+	safe_svcmode_maskall r0
+
+	b	secondary_startup
+ENDPROC(npcm7xx_secondary_startup)
diff --git a/arch/arm/mach-npcm/npcm7xx.c b/arch/arm/mach-npcm/npcm7xx.c
new file mode 100644
index 000000000000..132e9d587857
--- /dev/null
+++ b/arch/arm/mach-npcm/npcm7xx.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2017 Nuvoton Technology corporation.
+ * Copyright 2017 Google, Inc.
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#define NPCM7XX_AUX_VAL (L310_AUX_CTRL_INSTR_PREFETCH |			       \
+			 L310_AUX_CTRL_DATA_PREFETCH |			       \
+			 L310_AUX_CTRL_NS_LOCKDOWN |			       \
+			 L310_AUX_CTRL_CACHE_REPLACE_RR |		       \
+			 L2C_AUX_CTRL_SHARED_OVERRIDE |			       \
+			 L310_AUX_CTRL_FULL_LINE_ZERO)
+
+static const char *const npcm7xx_dt_match[] = {
+	"nuvoton,npcm750",
+	NULL
+};
+
+DT_MACHINE_START(NPCM7XX_DT, "NPCMX50 Chip family")
+	.atag_offset	= 0x100,
+	.dt_compat	= npcm7xx_dt_match,
+	.l2c_aux_val	= NPCM7XX_AUX_VAL,
+	.l2c_aux_mask	= ~NPCM7XX_AUX_VAL,
+MACHINE_END
diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c
new file mode 100644
index 000000000000..450e83c3c531
--- /dev/null
+++ b/arch/arm/mach-npcm/platsmp.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2017 Google, Inc.
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) "PLATSMP: " fmt
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <asm/cacheflush.h>
+#include <asm/smp.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#define NPCM7XX_SCRPAD_REG 0x13c
+
+extern void npcm7xx_secondary_startup(void);
+
+static int npcm7xx_smp_boot_secondary(unsigned int cpu,
+				      struct task_struct *idle)
+{
+	struct device_node *gcr_np;
+	void __iomem *gcr_base;
+	int ret = 0;
+
+	gcr_np = of_find_compatible_node(NULL, NULL, "nuvoton,npcm750-gcr");
+	if (!gcr_np) {
+		pr_err("no gcr device node\n");
+		ret = -EFAULT;
+		goto out;
+	}
+	gcr_base = of_iomap(gcr_np, 0);
+	if (!gcr_base) {
+		pr_err("could not iomap gcr at: 0x%p\n", gcr_base);
+		ret = -EFAULT;
+		goto out;
+	}
+
+	/* give boot ROM kernel start address. */
+	iowrite32(__pa_symbol(npcm7xx_secondary_startup), gcr_base +
+		  NPCM7XX_SCRPAD_REG);
+	/* make sure npcm7xx_secondary_startup is seen by all observers. */
+	smp_wmb();
+	dsb_sev();
+	/* make sure write buffer is drained */
+	mb();
+
+	iounmap(gcr_base);
+out:
+	return ret;
+}
+
+static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus)
+{
+	struct device_node *scu_np;
+	void __iomem *scu_base;
+
+	scu_np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+	if (!scu_np) {
+		pr_err("no scu device node\n");
+		return;
+	}
+	scu_base = of_iomap(scu_np, 0);
+	if (!scu_base) {
+		pr_err("could not iomap scu at: 0x%p\n", scu_base);
+		return;
+	}
+
+	scu_enable(scu_base);
+
+	iounmap(scu_base);
+}
+
+static struct smp_operations npcm7xx_smp_ops __initdata = {
+	.smp_prepare_cpus = npcm7xx_smp_prepare_cpus,
+	.smp_boot_secondary = npcm7xx_smp_boot_secondary,
+};
+
+CPU_METHOD_OF_DECLARE(npcm7xx_smp, "nuvoton,npcm7xx-smp", &npcm7xx_smp_ops);
-- 
2.14.1.581.gf28d330327-goog

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[PATCH v5 2/3] arm: dts: add Nuvoton NPCM750 device tree

[Brendan Higgins]

Add a common device tree for all Nuvoton NPCM750 BMCs and a board
specific device tree for the NPCM750 (Poleg) evaluation board.

Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: Tomer Maimon <tmaimon77@gmail.com>
Reviewed-by: Avi Fishman <avifishman70@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Tested-by: Tomer Maimon <tmaimon77@gmail.com>
Tested-by: Avi Fishman <avifishman70@gmail.com>
---
 .../arm/cpu-enable-method/nuvoton,npcm7xx-smp      |  42 +++++
 .../devicetree/bindings/arm/npcm/npcm.txt          |   6 +
 arch/arm/boot/dts/nuvoton-npcm750-evb.dts          |  57 +++++++
 arch/arm/boot/dts/nuvoton-npcm750.dtsi             | 177 +++++++++++++++++++++
 include/dt-bindings/clock/nuvoton,npcm7xx-clks.h   |  39 +++++
 5 files changed, 321 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
 create mode 100644 Documentation/devicetree/bindings/arm/npcm/npcm.txt
 create mode 100644 arch/arm/boot/dts/nuvoton-npcm750-evb.dts
 create mode 100644 arch/arm/boot/dts/nuvoton-npcm750.dtsi
 create mode 100644 include/dt-bindings/clock/nuvoton,npcm7xx-clks.h

diff --git a/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp b/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
new file mode 100644
index 000000000000..e81f85b400cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
@@ -0,0 +1,42 @@
+=========================================================
+Secondary CPU enable-method "nuvoton,npcm7xx-smp" binding
+=========================================================
+
+To apply to all CPUs, a single "nuvoton,npcm7xx-smp" enable method should be
+defined in the "cpus" node.
+
+Enable method name:	"nuvoton,npcm7xx-smp"
+Compatible machines:	"nuvoton,npcm750"
+Compatible CPUs:	"arm,cortex-a9"
+Related properties:	(none)
+
+Note:
+This enable method needs valid nodes compatible with "arm,cortex-a9-scu" and
+"nuvoton,npcm750-gcr".
+
+Example:
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		enable-method = "nuvoton,npcm7xx-smp";
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			clocks = <&clk NPCM7XX_CLK_CPU>;
+			clock-names = "clk_cpu";
+			reg = <0>;
+			next-level-cache = <&L2>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			clocks = <&clk NPCM7XX_CLK_CPU>;
+			clock-names = "clk_cpu";
+			reg = <1>;
+			next-level-cache = <&L2>;
+		};
+	};
+
diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.txt b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
new file mode 100644
index 000000000000..2d87d9ecea85
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
@@ -0,0 +1,6 @@
+NPCM Platforms Device Tree Bindings
+-----------------------------------
+NPCM750 SoC
+Required root node properties:
+	- compatible = "nuvoton,npcm750";
+
diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
new file mode 100644
index 000000000000..e54a870d3ee0
--- /dev/null
+++ b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
@@ -0,0 +1,57 @@
+/*
+ * DTS file for all NPCM750 SoCs
+ *
+ * Copyright 2012 Tomer Maimon <tomer.maimon@nuvoton.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/dts-v1/;
+#include "nuvoton-npcm750.dtsi"
+
+/ {
+	model = "Nuvoton npcm750 Development Board (Device Tree)";
+	compatible = "nuvoton,npcm750";
+
+	chosen {
+		stdout-path = &serial3;
+		bootargs = "earlyprintk=serial,serial3,115200";
+	};
+
+	memory {
+		reg = <0 0x40000000>;
+	};
+
+	cpus {
+		enable-method = "nuvoton,npcm7xx-smp";
+	};
+};
+
+&clk {
+	status = "okay";
+};
+
+&watchdog1 {
+	status = "okay";
+};
+
+&serial0 {
+	status = "okay";
+};
+
+&serial1 {
+	status = "okay";
+};
+
+&serial2 {
+	status = "okay";
+};
+
+&serial3 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/nuvoton-npcm750.dtsi b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
new file mode 100644
index 000000000000..bca96b3ae9d3
--- /dev/null
+++ b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
@@ -0,0 +1,177 @@
+/*
+ * DTSi file for the NPCM750 SoC
+ *
+ * Copyright 2012 Tomer Maimon <tomer.maimon@nuvoton.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include "skeleton.dtsi"
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/clock/nuvoton,npcm7xx-clks.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&gic>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			clocks = <&clk NPCM7XX_CLK_CPU>;
+			clock-names = "clk_cpu";
+			reg = <0>;
+			next-level-cache = <&l2>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			clocks = <&clk NPCM7XX_CLK_CPU>;
+			clock-names = "clk_cpu";
+			reg = <1>;
+			next-level-cache = <&l2>;
+		};
+	};
+
+	gcr: gcr@f0800000 {
+		compatible = "nuvoton,npcm750-gcr", "syscon",
+			"simple-mfd";
+		reg = <0xf0800000 0x1000>;
+	};
+
+	scu: scu@f03fe000 {
+		compatible = "arm,cortex-a9-scu";
+		reg = <0xf03fe000 0x1000>;
+	};
+
+	l2: l2-cache@f03fc000 {
+		compatible = "arm,pl310-cache";
+		reg = <0xf03fc000 0x1000>;
+		interrupts = <0 21 4>;
+		cache-unified;
+		cache-level = <2>;
+		clocks = <&clk NPCM7XX_CLK_AXI>;
+	};
+
+	gic: interrupt-controller@f03ff000 {
+		compatible = "arm,cortex-a9-gic";
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		reg = <0xf03ff000 0x1000>,
+		    <0xf03fe100 0x100>;
+	};
+
+	clk: clock-controller@f0801000 {
+		compatible = "nuvoton,npcm750-clk";
+		#clock-cells = <1>;
+		reg = <0xf0801000 0x1000>;
+	};
+
+	/* external clock signal rg1refck, supplied by the phy */
+	clk-rg1refck {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <125000000>;
+	};
+
+	/* external clock signal rg2refck, supplied by the phy */
+	clk-rg2refck {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <125000000>;
+	};
+
+	clk-xin {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <50000000>;
+	};
+
+	timer@f03fe600 {
+		compatible = "arm,cortex-a9-twd-timer";
+		reg = <0xf03fe600 0x20>;
+		interrupts = <1 13 0x304>;
+		clocks = <&clk NPCM7XX_CLK_TIMER>;
+	};
+
+	apb {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		interrupt-parent = <&gic>;
+		ranges;
+
+		timer0: timer@f0000000 {
+			compatible = "nuvoton,npcm750-timer";
+			interrupts = <0 32 4>;
+			reg = <0xf0000000 0x1000>;
+			clocks = <&clk NPCM7XX_CLK_TIMER>;
+		};
+
+		watchdog0: watchdog@f0008000 {
+			compatible = "nuvoton,npcm750-wdt";
+			interrupts = <0 47 4>;
+			reg = <0xf0008000 0x1000>;
+			status = "disabled";
+			clocks = <&clk NPCM7XX_CLK_TIMER>;
+		};
+
+		watchdog1: watchdog@f0009000 {
+			compatible = "nuvoton,npcm750-wdt";
+			interrupts = <0 48 4>;
+			reg = <0xf0009000 0x1000>;
+			status = "disabled";
+			clocks = <&clk NPCM7XX_CLK_TIMER>;
+		};
+
+		watchdog2: watchdog@f000a000 {
+			compatible = "nuvoton,npcm750-wdt";
+			interrupts = <0 49 4>;
+			reg = <0xf000a000 0x1000>;
+			status = "disabled";
+			clocks = <&clk NPCM7XX_CLK_TIMER>;
+		};
+
+		serial0: serial0@f0001000 {
+			compatible = "nuvoton,npcm750-uart";
+			reg = <0xf0001000 0x1000>;
+			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
+			interrupts = <0 2 4>;
+			status = "disabled";
+		};
+
+		serial1: serial1@f0002000 {
+			compatible = "nuvoton,npcm750-uart";
+			reg = <0xf0002000 0x1000>;
+			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
+			interrupts = <0 3 4>;
+			status = "disabled";
+		};
+
+		serial2: serial2@f0003000 {
+			compatible = "nuvoton,npcm750-uart";
+			reg = <0xf0003000 0x1000>;
+			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
+			interrupts = <0 4 4>;
+			status = "disabled";
+		};
+
+		serial3: serial3@f0004000 {
+			compatible = "nuvoton,npcm750-uart";
+			reg = <0xf0004000 0x1000>;
+			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
+			interrupts = <0 5 4>;
+			status = "disabled";
+		};
+	};
+};
diff --git a/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
new file mode 100644
index 000000000000..c69d3bbf7e42
--- /dev/null
+++ b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2016 Nuvoton Technologies,  tali.perry@nuvoton.com
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ */
+
+#ifndef _DT_BINDINGS_CLK_NPCM7XX_H
+#define _DT_BINDINGS_CLK_NPCM7XX_H
+
+#define NPCM7XX_CLK_PLL0	0
+#define NPCM7XX_CLK_PLL1	1
+#define NPCM7XX_CLK_PLL2	2
+#define NPCM7XX_CLK_GFX		3
+#define NPCM7XX_CLK_APB1	4
+#define NPCM7XX_CLK_APB2	5
+#define NPCM7XX_CLK_APB3	6
+#define NPCM7XX_CLK_APB4	7
+#define NPCM7XX_CLK_APB5	8
+#define NPCM7XX_CLK_MC		9
+#define NPCM7XX_CLK_CPU		10
+#define NPCM7XX_CLK_SPI0	11
+#define NPCM7XX_CLK_SPI3	12
+#define NPCM7XX_CLK_SPIX	13
+#define NPCM7XX_CLK_UART_CORE	14
+#define NPCM7XX_CLK_TIMER	15
+#define NPCM7XX_CLK_HOST_UART	16
+#define NPCM7XX_CLK_MMC		17
+#define NPCM7XX_CLK_SDHC	18
+#define NPCM7XX_CLK_ADC		19
+#define NPCM7XX_CLK_GFX_MEM	20
+#define NPCM7XX_CLK_USB_BRIDGE	21
+#define NPCM7XX_CLK_AXI		22
+#define NPCM7XX_CLK_AHB		23
+#define NPCM7XX_CLK_EMC		24
+#define NPCM7XX_CLK_GMAC	25
+
+#endif
-- 
2.14.1.581.gf28d330327-goog

[PATCH v5 3/3] MAINTAINERS: Add entry for the Nuvoton NPCM architecture

[Brendan Higgins]

Add maintainers and reviewers for the Nuvoton NPCM architecture.

Signed-off-by: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Reviewed-by: Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 MAINTAINERS | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 44cb004c765d..ec0d35384a16 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1598,6 +1598,19 @@ F:	drivers/pinctrl/nomadik/
 F:	drivers/i2c/busses/i2c-nomadik.c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git
 
+ARM/NUVOTON NPCM ARCHITECTURE
+M:	Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
+M:	Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
+R:	Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
+R:	Rick Altherr <raltherr-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
+L:	openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org (moderated for non-subscribers)
+S:	Supported
+F:	arch/arm/mach-npcm/
+F:	arch/arm/boot/dts/nuvoton-npcm*
+F:	include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
+F:	drivers/*/*npcm*
+F:	Documentation/*/*npcm*
+
 ARM/NUVOTON W90X900 ARM ARCHITECTURE
 M:	Wan ZongShun <mcuos.com-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
 L:	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org (moderated for non-subscribers)
-- 
2.14.1.581.gf28d330327-goog

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Re: [PATCH v5 1/3] arm: npcm: add basic support for Nuvoton BMCs

[Tomer Maimon]

On 9 September 2017 at 04:53, Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> wrote:
> Adds basic support for the Nuvoton NPCM750 BMC.
>
> Signed-off-by: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
> ---
>  arch/arm/Kconfig             |  2 +
>  arch/arm/Makefile            |  1 +
>  arch/arm/mach-npcm/Kconfig   | 48 ++++++++++++++++++++++++
>  arch/arm/mach-npcm/Makefile  |  3 ++
>  arch/arm/mach-npcm/headsmp.S | 17 +++++++++
>  arch/arm/mach-npcm/npcm7xx.c | 34 +++++++++++++++++
>  arch/arm/mach-npcm/platsmp.c | 88 ++++++++++++++++++++++++++++++++++++++++++++
>  7 files changed, 193 insertions(+)
>  create mode 100644 arch/arm/mach-npcm/Kconfig
>  create mode 100644 arch/arm/mach-npcm/Makefile
>  create mode 100644 arch/arm/mach-npcm/headsmp.S
>  create mode 100644 arch/arm/mach-npcm/npcm7xx.c
>  create mode 100644 arch/arm/mach-npcm/platsmp.c
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 61a0cb15067e..05543f1cfbde 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -782,6 +782,8 @@ source "arch/arm/mach-netx/Kconfig"
>
>  source "arch/arm/mach-nomadik/Kconfig"
>
> +source "arch/arm/mach-npcm/Kconfig"
> +
>  source "arch/arm/mach-nspire/Kconfig"
>
>  source "arch/arm/plat-omap/Kconfig"
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 47d3a1ab08d2..60ca50c7d762 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -191,6 +191,7 @@ machine-$(CONFIG_ARCH_MEDIATEK)             += mediatek
>  machine-$(CONFIG_ARCH_MXS)             += mxs
>  machine-$(CONFIG_ARCH_NETX)            += netx
>  machine-$(CONFIG_ARCH_NOMADIK)         += nomadik
> +machine-$(CONFIG_ARCH_NPCM)            += npcm
>  machine-$(CONFIG_ARCH_NSPIRE)          += nspire
>  machine-$(CONFIG_ARCH_OXNAS)           += oxnas
>  machine-$(CONFIG_ARCH_OMAP1)           += omap1
> diff --git a/arch/arm/mach-npcm/Kconfig b/arch/arm/mach-npcm/Kconfig
> new file mode 100644
> index 000000000000..21dfa8ce828f
> --- /dev/null
> +++ b/arch/arm/mach-npcm/Kconfig
> @@ -0,0 +1,48 @@
> +menuconfig ARCH_NPCM
> +       bool "Nuvoton NPCM Architecture"
> +       select ARCH_REQUIRE_GPIOLIB
> +       select USE_OF
> +       select PINCTRL
> +       select PINCTRL_NPCM7XX
> +
> +if ARCH_NPCM
> +
> +comment "NPCMX50 CPU type"
> +
> +config CPU_NPCM750
> +       depends on ARCH_NPCM && ARCH_MULTI_V7
> +       bool "Support for NPCM750 BMC CPU (Poleg)"
> +       select CACHE_L2X0
> +       select CPU_V7
> +       select ARM_GIC
> +       select HAVE_SMP
> +       select SMP
> +       select SMP_ON_UP
> +       select HAVE_ARM_SCU
> +       select HAVE_ARM_TWD if SMP
> +       select ARM_ERRATA_720789
> +       select ARM_ERRATA_754322
> +       select ARM_ERRATA_764369
> +       select ARM_ERRATA_794072
> +       select PL310_ERRATA_588369
> +       select PL310_ERRATA_727915
> +       select USB_EHCI_ROOT_HUB_TT
> +       select USB_ARCH_HAS_HCD
> +       select USB_ARCH_HAS_EHCI
> +       select USB_EHCI_HCD
> +       select USB_ARCH_HAS_OHCI
> +       select USB_OHCI_HCD
> +       select USB
> +       select FIQ
> +       select CPU_USE_DOMAINS
> +       select GENERIC_CLOCKEVENTS
> +       select CLKDEV_LOOKUP
> +       select COMMON_CLK if OF
> +       select NPCM750_TIMER
> +       select MFD_SYSCON
> +       help
> +         Support for NPCM750 BMC CPU (Poleg).
> +
> +         Nuvoton NPCM750 BMC based on the Cortex A9.
> +
> +endif
> diff --git a/arch/arm/mach-npcm/Makefile b/arch/arm/mach-npcm/Makefile
> new file mode 100644
> index 000000000000..78416055b854
> --- /dev/null
> +++ b/arch/arm/mach-npcm/Makefile
> @@ -0,0 +1,3 @@
> +AFLAGS_headsmp.o               += -march=armv7-a
> +
> +obj-$(CONFIG_CPU_NPCM750)      += npcm7xx.o platsmp.o headsmp.o
> diff --git a/arch/arm/mach-npcm/headsmp.S b/arch/arm/mach-npcm/headsmp.S
> new file mode 100644
> index 000000000000..9fccbbd49ed4
> --- /dev/null
> +++ b/arch/arm/mach-npcm/headsmp.S
> @@ -0,0 +1,17 @@
> +/*
> + * Copyright 2017 Google, Inc.
> + *
> + * 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/linkage.h>
> +#include <linux/init.h>
> +#include <asm/assembler.h>
> +
> +ENTRY(npcm7xx_secondary_startup)
> +       safe_svcmode_maskall r0
> +
> +       b       secondary_startup
> +ENDPROC(npcm7xx_secondary_startup)
> diff --git a/arch/arm/mach-npcm/npcm7xx.c b/arch/arm/mach-npcm/npcm7xx.c
> new file mode 100644
> index 000000000000..132e9d587857
> --- /dev/null
> +++ b/arch/arm/mach-npcm/npcm7xx.c
> @@ -0,0 +1,34 @@
> +/*
> + * Copyright (c) 2017 Nuvoton Technology corporation.
> + * Copyright 2017 Google, Inc.
> + *
> + * 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/kernel.h>
> +#include <linux/types.h>
> +#include <asm/mach/arch.h>
> +#include <asm/mach-types.h>
> +#include <asm/mach/map.h>
> +#include <asm/hardware/cache-l2x0.h>
> +
> +#define NPCM7XX_AUX_VAL (L310_AUX_CTRL_INSTR_PREFETCH |                               \
> +                        L310_AUX_CTRL_DATA_PREFETCH |                         \
> +                        L310_AUX_CTRL_NS_LOCKDOWN |                           \
> +                        L310_AUX_CTRL_CACHE_REPLACE_RR |                      \
> +                        L2C_AUX_CTRL_SHARED_OVERRIDE |                        \
> +                        L310_AUX_CTRL_FULL_LINE_ZERO)
> +
> +static const char *const npcm7xx_dt_match[] = {
> +       "nuvoton,npcm750",
> +       NULL
> +};
> +
> +DT_MACHINE_START(NPCM7XX_DT, "NPCMX50 Chip family")
> +       .atag_offset    = 0x100,
> +       .dt_compat      = npcm7xx_dt_match,
> +       .l2c_aux_val    = NPCM7XX_AUX_VAL,
> +       .l2c_aux_mask   = ~NPCM7XX_AUX_VAL,
> +MACHINE_END
> diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c
> new file mode 100644
> index 000000000000..450e83c3c531
> --- /dev/null
> +++ b/arch/arm/mach-npcm/platsmp.c
> @@ -0,0 +1,88 @@
> +/*
> + * Copyright 2017 Google, Inc.
> + *
> + * 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.
> + */
> +
> +#define pr_fmt(fmt) "PLATSMP: " fmt
> +
> +#include <linux/delay.h>
> +#include <linux/device.h>
> +#include <linux/smp.h>
> +#include <linux/io.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_address.h>
> +#include <asm/cacheflush.h>
> +#include <asm/smp.h>
> +#include <asm/smp_plat.h>
> +#include <asm/smp_scu.h>
> +
> +#define NPCM7XX_SCRPAD_REG 0x13c
> +
> +extern void npcm7xx_secondary_startup(void);
> +
> +static int npcm7xx_smp_boot_secondary(unsigned int cpu,
> +                                     struct task_struct *idle)
> +{
> +       struct device_node *gcr_np;
> +       void __iomem *gcr_base;
> +       int ret = 0;
> +
> +       gcr_np = of_find_compatible_node(NULL, NULL, "nuvoton,npcm750-gcr");
> +       if (!gcr_np) {
> +               pr_err("no gcr device node\n");
> +               ret = -EFAULT;
> +               goto out;
> +       }
> +       gcr_base = of_iomap(gcr_np, 0);
> +       if (!gcr_base) {
> +               pr_err("could not iomap gcr at: 0x%p\n", gcr_base);
> +               ret = -EFAULT;
> +               goto out;
> +       }
> +
> +       /* give boot ROM kernel start address. */
> +       iowrite32(__pa_symbol(npcm7xx_secondary_startup), gcr_base +
> +                 NPCM7XX_SCRPAD_REG);
> +       /* make sure npcm7xx_secondary_startup is seen by all observers. */
> +       smp_wmb();
> +       dsb_sev();
> +       /* make sure write buffer is drained */
> +       mb();
> +
> +       iounmap(gcr_base);
> +out:
> +       return ret;
> +}
> +
> +static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus)
> +{
> +       struct device_node *scu_np;
> +       void __iomem *scu_base;
> +
> +       scu_np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
> +       if (!scu_np) {
> +               pr_err("no scu device node\n");
> +               return;
> +       }
> +       scu_base = of_iomap(scu_np, 0);
> +       if (!scu_base) {
> +               pr_err("could not iomap scu at: 0x%p\n", scu_base);
> +               return;
> +       }
> +
> +       scu_enable(scu_base);
> +
> +       iounmap(scu_base);
> +}
> +
> +static struct smp_operations npcm7xx_smp_ops __initdata = {
> +       .smp_prepare_cpus = npcm7xx_smp_prepare_cpus,
> +       .smp_boot_secondary = npcm7xx_smp_boot_secondary,
> +};
> +
> +CPU_METHOD_OF_DECLARE(npcm7xx_smp, "nuvoton,npcm7xx-smp", &npcm7xx_smp_ops);
> --
> 2.14.1.581.gf28d330327-goog
>

Reviewed-by: Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Reviewed-by: Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Tested-by: Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Tested-by: Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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Re: [PATCH v5 2/3] arm: dts: add Nuvoton NPCM750 device tree

[Rob Herring]

On Fri, Sep 08, 2017 at 06:53:07PM -0700, Brendan Higgins wrote:
> Add a common device tree for all Nuvoton NPCM750 BMCs and a board
> specific device tree for the NPCM750 (Poleg) evaluation board.
> 
> Signed-off-by: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
> Reviewed-by: Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Reviewed-by: Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Reviewed-by: Joel Stanley <joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org>
> Tested-by: Tomer Maimon <tmaimon77-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Tested-by: Avi Fishman <avifishman70-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  .../arm/cpu-enable-method/nuvoton,npcm7xx-smp      |  42 +++++
>  .../devicetree/bindings/arm/npcm/npcm.txt          |   6 +
>  arch/arm/boot/dts/nuvoton-npcm750-evb.dts          |  57 +++++++
>  arch/arm/boot/dts/nuvoton-npcm750.dtsi             | 177 +++++++++++++++++++++
>  include/dt-bindings/clock/nuvoton,npcm7xx-clks.h   |  39 +++++
>  5 files changed, 321 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
>  create mode 100644 Documentation/devicetree/bindings/arm/npcm/npcm.txt
>  create mode 100644 arch/arm/boot/dts/nuvoton-npcm750-evb.dts
>  create mode 100644 arch/arm/boot/dts/nuvoton-npcm750.dtsi
>  create mode 100644 include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
> 
> diff --git a/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp b/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
> new file mode 100644
> index 000000000000..e81f85b400cf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/cpu-enable-method/nuvoton,npcm7xx-smp
> @@ -0,0 +1,42 @@
> +=========================================================
> +Secondary CPU enable-method "nuvoton,npcm7xx-smp" binding
> +=========================================================
> +
> +To apply to all CPUs, a single "nuvoton,npcm7xx-smp" enable method should be
> +defined in the "cpus" node.
> +
> +Enable method name:	"nuvoton,npcm7xx-smp"
> +Compatible machines:	"nuvoton,npcm750"
> +Compatible CPUs:	"arm,cortex-a9"
> +Related properties:	(none)
> +
> +Note:
> +This enable method needs valid nodes compatible with "arm,cortex-a9-scu" and
> +"nuvoton,npcm750-gcr".
> +
> +Example:
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		enable-method = "nuvoton,npcm7xx-smp";
> +
> +		cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			clocks = <&clk NPCM7XX_CLK_CPU>;
> +			clock-names = "clk_cpu";
> +			reg = <0>;
> +			next-level-cache = <&L2>;
> +		};
> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			clocks = <&clk NPCM7XX_CLK_CPU>;
> +			clock-names = "clk_cpu";
> +			reg = <1>;
> +			next-level-cache = <&L2>;
> +		};
> +	};
> +
> diff --git a/Documentation/devicetree/bindings/arm/npcm/npcm.txt b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
> new file mode 100644
> index 000000000000..2d87d9ecea85
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/npcm/npcm.txt
> @@ -0,0 +1,6 @@
> +NPCM Platforms Device Tree Bindings
> +-----------------------------------
> +NPCM750 SoC
> +Required root node properties:
> +	- compatible = "nuvoton,npcm750";
> +
> diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
> new file mode 100644
> index 000000000000..e54a870d3ee0
> --- /dev/null
> +++ b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
> @@ -0,0 +1,57 @@
> +/*
> + * DTS file for all NPCM750 SoCs
> + *
> + * Copyright 2012 Tomer Maimon <tomer.maimon-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org>
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +/dts-v1/;
> +#include "nuvoton-npcm750.dtsi"
> +
> +/ {
> +	model = "Nuvoton npcm750 Development Board (Device Tree)";
> +	compatible = "nuvoton,npcm750";
> +
> +	chosen {
> +		stdout-path = &serial3;

stdout-path is a path string, not a phandle.

> +		bootargs = "earlyprintk=serial,serial3,115200";

That's not valid bootargs with mainline.

> +	};
> +
> +	memory {
> +		reg = <0 0x40000000>;
> +	};
> +
> +	cpus {
> +		enable-method = "nuvoton,npcm7xx-smp";

This is not a board specific property. Belongs in the SoC dtsi.

> +	};
> +};
> +
> +&clk {
> +	status = "okay";

Pretty sure you'd always want the clock controller enabled.

> +};
> +
> +&watchdog1 {
> +	status = "okay";
> +};
> +
> +&serial0 {
> +	status = "okay";
> +};
> +
> +&serial1 {
> +	status = "okay";
> +};
> +
> +&serial2 {
> +	status = "okay";
> +};
> +
> +&serial3 {
> +	status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/nuvoton-npcm750.dtsi b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
> new file mode 100644
> index 000000000000..bca96b3ae9d3
> --- /dev/null
> +++ b/arch/arm/boot/dts/nuvoton-npcm750.dtsi
> @@ -0,0 +1,177 @@
> +/*
> + * DTSi file for the NPCM750 SoC
> + *
> + * Copyright 2012 Tomer Maimon <tomer.maimon-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org>
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include "skeleton.dtsi"

Don't use skeleton.dtsi. We want to remove it.

> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/clock/nuvoton,npcm7xx-clks.h>
> +
> +/ {
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +	interrupt-parent = <&gic>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			clocks = <&clk NPCM7XX_CLK_CPU>;
> +			clock-names = "clk_cpu";
> +			reg = <0>;
> +			next-level-cache = <&l2>;
> +		};
> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			clocks = <&clk NPCM7XX_CLK_CPU>;
> +			clock-names = "clk_cpu";
> +			reg = <1>;
> +			next-level-cache = <&l2>;
> +		};
> +	};
> +
> +	gcr: gcr@f0800000 {
> +		compatible = "nuvoton,npcm750-gcr", "syscon",
> +			"simple-mfd";
> +		reg = <0xf0800000 0x1000>;
> +	};
> +
> +	scu: scu@f03fe000 {
> +		compatible = "arm,cortex-a9-scu";
> +		reg = <0xf03fe000 0x1000>;
> +	};
> +
> +	l2: l2-cache@f03fc000 {

cache-controller@...

> +		compatible = "arm,pl310-cache";
> +		reg = <0xf03fc000 0x1000>;
> +		interrupts = <0 21 4>;
> +		cache-unified;
> +		cache-level = <2>;
> +		clocks = <&clk NPCM7XX_CLK_AXI>;
> +	};
> +
> +	gic: interrupt-controller@f03ff000 {
> +		compatible = "arm,cortex-a9-gic";
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		reg = <0xf03ff000 0x1000>,
> +		    <0xf03fe100 0x100>;
> +	};
> +
> +	clk: clock-controller@f0801000 {
> +		compatible = "nuvoton,npcm750-clk";
> +		#clock-cells = <1>;
> +		reg = <0xf0801000 0x1000>;
> +	};

All these memory mapped peripherals should be under a bus/soc node

> +
> +	/* external clock signal rg1refck, supplied by the phy */
> +	clk-rg1refck {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <125000000>;
> +	};
> +
> +	/* external clock signal rg2refck, supplied by the phy */
> +	clk-rg2refck {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <125000000>;
> +	};
> +
> +	clk-xin {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <50000000>;
> +	};
> +
> +	timer@f03fe600 {
> +		compatible = "arm,cortex-a9-twd-timer";
> +		reg = <0xf03fe600 0x20>;
> +		interrupts = <1 13 0x304>;
> +		clocks = <&clk NPCM7XX_CLK_TIMER>;
> +	};
> +
> +	apb {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		compatible = "simple-bus";
> +		interrupt-parent = <&gic>;
> +		ranges;

It's preferred to have actual values here and limit the address range of 
the bus.

> +
> +		timer0: timer@f0000000 {
> +			compatible = "nuvoton,npcm750-timer";
> +			interrupts = <0 32 4>;
> +			reg = <0xf0000000 0x1000>;
> +			clocks = <&clk NPCM7XX_CLK_TIMER>;
> +		};
> +
> +		watchdog0: watchdog@f0008000 {
> +			compatible = "nuvoton,npcm750-wdt";
> +			interrupts = <0 47 4>;
> +			reg = <0xf0008000 0x1000>;
> +			status = "disabled";
> +			clocks = <&clk NPCM7XX_CLK_TIMER>;
> +		};
> +
> +		watchdog1: watchdog@f0009000 {
> +			compatible = "nuvoton,npcm750-wdt";
> +			interrupts = <0 48 4>;
> +			reg = <0xf0009000 0x1000>;
> +			status = "disabled";
> +			clocks = <&clk NPCM7XX_CLK_TIMER>;
> +		};
> +
> +		watchdog2: watchdog@f000a000 {
> +			compatible = "nuvoton,npcm750-wdt";
> +			interrupts = <0 49 4>;
> +			reg = <0xf000a000 0x1000>;
> +			status = "disabled";
> +			clocks = <&clk NPCM7XX_CLK_TIMER>;
> +		};
> +
> +		serial0: serial0@f0001000 {
> +			compatible = "nuvoton,npcm750-uart";
> +			reg = <0xf0001000 0x1000>;
> +			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> +			interrupts = <0 2 4>;
> +			status = "disabled";
> +		};
> +
> +		serial1: serial1@f0002000 {
> +			compatible = "nuvoton,npcm750-uart";
> +			reg = <0xf0002000 0x1000>;
> +			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> +			interrupts = <0 3 4>;
> +			status = "disabled";
> +		};
> +
> +		serial2: serial2@f0003000 {
> +			compatible = "nuvoton,npcm750-uart";
> +			reg = <0xf0003000 0x1000>;
> +			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> +			interrupts = <0 4 4>;
> +			status = "disabled";
> +		};
> +
> +		serial3: serial3@f0004000 {
> +			compatible = "nuvoton,npcm750-uart";
> +			reg = <0xf0004000 0x1000>;
> +			clocks = <&clk NPCM7XX_CLK_UART_CORE>;
> +			interrupts = <0 5 4>;
> +			status = "disabled";
> +		};
> +	};
> +};
> diff --git a/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
> new file mode 100644
> index 000000000000..c69d3bbf7e42
> --- /dev/null
> +++ b/include/dt-bindings/clock/nuvoton,npcm7xx-clks.h
> @@ -0,0 +1,39 @@
> +/*
> + * Copyright (C) 2016 Nuvoton Technologies,  tali.perry-KrzQf0k3Iz9BDgjK7y7TUQ@public.gmane.org
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + */
> +
> +#ifndef _DT_BINDINGS_CLK_NPCM7XX_H
> +#define _DT_BINDINGS_CLK_NPCM7XX_H
> +
> +#define NPCM7XX_CLK_PLL0	0
> +#define NPCM7XX_CLK_PLL1	1
> +#define NPCM7XX_CLK_PLL2	2
> +#define NPCM7XX_CLK_GFX		3
> +#define NPCM7XX_CLK_APB1	4
> +#define NPCM7XX_CLK_APB2	5
> +#define NPCM7XX_CLK_APB3	6
> +#define NPCM7XX_CLK_APB4	7
> +#define NPCM7XX_CLK_APB5	8
> +#define NPCM7XX_CLK_MC		9
> +#define NPCM7XX_CLK_CPU		10
> +#define NPCM7XX_CLK_SPI0	11
> +#define NPCM7XX_CLK_SPI3	12
> +#define NPCM7XX_CLK_SPIX	13
> +#define NPCM7XX_CLK_UART_CORE	14
> +#define NPCM7XX_CLK_TIMER	15
> +#define NPCM7XX_CLK_HOST_UART	16
> +#define NPCM7XX_CLK_MMC		17
> +#define NPCM7XX_CLK_SDHC	18
> +#define NPCM7XX_CLK_ADC		19
> +#define NPCM7XX_CLK_GFX_MEM	20
> +#define NPCM7XX_CLK_USB_BRIDGE	21
> +#define NPCM7XX_CLK_AXI		22
> +#define NPCM7XX_CLK_AHB		23
> +#define NPCM7XX_CLK_EMC		24
> +#define NPCM7XX_CLK_GMAC	25
> +
> +#endif
> -- 
> 2.14.1.581.gf28d330327-goog
> 
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Re: [PATCH v5 2/3] arm: dts: add Nuvoton NPCM750 device tree

[Rob Herring]

On Mon, Sep 18, 2017 at 2:46 PM, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> On Fri, Sep 08, 2017 at 06:53:07PM -0700, Brendan Higgins wrote:
>> Add a common device tree for all Nuvoton NPCM750 BMCs and a board
>> specific device tree for the NPCM750 (Poleg) evaluation board.

[...]

>> +/ {
>> +     model = "Nuvoton npcm750 Development Board (Device Tree)";
>> +     compatible = "nuvoton,npcm750";
>> +
>> +     chosen {
>> +             stdout-path = &serial3;
>
> stdout-path is a path string, not a phandle.

Sorry, it's Monday and my brain is not working. This is fine.

Rob
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