arm: npcm: add basic support for Nuvoton BMCs

Changes since version 1:
- Add dt-binding documentation to NPCM
- Add dt-binding documentation to npcm7xx-smp

This patch set adds support for the Nuvoton NPCM Baseboard Management Controller (BMC) SoC architecture as well as the NPCM750 variant. NPCM is an ARM based SoC with external DDR RAM and supports a large set of peripherals.

The NPCM750 is based on Cortex A9 and comes in single core and dual core flavors.

The device tree added in this patchset has a number of bindings for which the corresponding drivers will be sent out later and thus do not yet have binding documentation. Apologies in advance if you would like the bindings to be added along with the corresponding drivers.

this patch set based on Brendan Higgins patcehs.
https://patchwork.kernel.org/project/linux-arm-kernel/list/?submitter=170155

Thanks!

Tomer Maimon (3):
arm: npcm: add basic support for Nuvoton BMCs
arm: dts: add Nuvoton NPCM750 device tree
MAINTAINERS: Add entry for Nuvoton NPCM architecture

 .../arm/cpu-enable-method/nuvoton,npcm7xx-smp      |   42 +
 .../devicetree/bindings/arm/npcm/npcm.txt          |    6 +
 MAINTAINERS                                        |   13 +
 arch/arm/Kconfig                                   |    2 +
 arch/arm/Makefile                                  |    1 +
 arch/arm/boot/dts/nuvoton-npcm750-evb.dts          |  468 ++++++++
 arch/arm/boot/dts/nuvoton-npcm750-gpio.dtsi        |  877 +++++++++++++++
 arch/arm/boot/dts/nuvoton-npcm750.dtsi             | 1189 ++++++++++++++++++++
 arch/arm/configs/PolegSVB_defconfig                |  428 +++++++
 arch/arm/mach-npcm/Kconfig                         |   61 +
 arch/arm/mach-npcm/Makefile                        |    6 +
 arch/arm/mach-npcm/headsmp.S                       |   22 +
 arch/arm/mach-npcm/npcm7xx.c                       |   27 +
 arch/arm/mach-npcm/platsmp.c                       |   86 ++
 14 files changed, 3228 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-gpio.dtsi
 create mode 100644 arch/arm/boot/dts/nuvoton-npcm750.dtsi
 create mode 100644 arch/arm/configs/PolegSVB_defconfig
 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

2.14.1

Adds basic support for the Nuvoton NPCM750 BMC.

Based on [v8,1/3] arm: npcm: add basic support for Nuvoton BMCs patch:
Brendan Higgins : - https://patchwork.kernel.org/patch/10063409/

---
 arch/arm/Kconfig                    |   2 +
 arch/arm/Makefile                   |   1 +
 arch/arm/configs/PolegSVB_defconfig | 428 ++++++++++++++++++++++++++++++++++++
 arch/arm/mach-npcm/Kconfig          |  61 +++++
 arch/arm/mach-npcm/Makefile         |   6 +
 arch/arm/mach-npcm/headsmp.S        |  22 ++
 arch/arm/mach-npcm/npcm7xx.c        |  27 +++
 arch/arm/mach-npcm/platsmp.c        |  86 ++++++++
 8 files changed, 633 insertions(+)
 create mode 100644 arch/arm/configs/PolegSVB_defconfig
 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

index 61a0cb15067e..05543f1cfbde 100644
@@ -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"

index 47d3a1ab08d2..60ca50c7d762 100644
@@ -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

new file mode 100644
index 000000000000..37f05e4bd0b3
@@ -0,0 +1,6 @@
+AFLAGS_headsmp.o		+= -march=armv7-a
+
+obj-$(CONFIG_ARCH_NPCM7XX)	+= npcm7xx.o
+obj-$(CONFIG_ARCH_NPCM750)	+= platsmp.o headsmp.o
+
+

new file mode 100644
index 000000000000..5456268453f0
@@ -0,0 +1,22 @@
+/*
+ * 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/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+
+/*
+ * The boot ROM does not start secondary CPUs in SVC mode, so we need to do that
+ * here.
+ */
+ENTRY(npcm7xx_secondary_startup)
+	safe_svcmode_maskall r0
+
+	b	secondary_startup
+ENDPROC(npcm7xx_secondary_startup)

new file mode 100644
index 000000000000..fa1759b85300
@@ -0,0 +1,27 @@
+/*
+ * 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>
+
+static const char *const npcm7xx_dt_match[] = {
+	"nuvoton,npcm750",
+	NULL
+};
+
+DT_MACHINE_START(NPCM7XX_DT, "NPCM7XX Chip family")
+	.atag_offset	= 0x100,
+	.dt_compat	= npcm7xx_dt_match,
+	.l2c_aux_val	= 0x0,
+	.l2c_aux_mask	= ~0x0,
+MACHINE_END

2.14.1

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

Based on [v8,2/3] arm: dts: add Nuvoton NPCM750 device tree patch:
Brendan Higgins : - https://patchwork.kernel.org/patch/10063497/

---
 .../arm/cpu-enable-method/nuvoton,npcm7xx-smp      |   42 +
 .../devicetree/bindings/arm/npcm/npcm.txt          |    6 +
 arch/arm/boot/dts/nuvoton-npcm750-evb.dts          |  468 ++++++++
 arch/arm/boot/dts/nuvoton-npcm750-gpio.dtsi        |  877 +++++++++++++++
 arch/arm/boot/dts/nuvoton-npcm750.dtsi             | 1189 ++++++++++++++++++++
 5 files changed, 2582 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-gpio.dtsi
 create mode 100644 arch/arm/boot/dts/nuvoton-npcm750.dtsi

new file mode 100644
index 000000000000..e81f85b400cf
@@ -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>;
+		};
+	};
+

new file mode 100644
index 000000000000..2d87d9ecea85
@@ -0,0 +1,6 @@
+NPCM Platforms Device Tree Bindings
+-----------------------------------
+NPCM750 SoC
+Required root node properties:
+	- compatible = "nuvoton,npcm750";
+

2.14.1

Add maintainers and reviewers for Nuvoton NPCM architecture

Based on [v8,3/3] MAINTAINERS: Add entry for Nuvoton NPCM architecture patch:
Brendan Higgins : - https://patchwork.kernel.org/patch/10063413/

---
 MAINTAINERS | 13 +++++++++++++
 1 file changed, 13 insertions(+)

index 1c3feffb1c1c..9b90748b729d 100644
@@ -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 <[email protected]>
+M:	Tomer Maimon <[email protected]>
+R:	Brendan Higgins <[email protected]>
+R:	Rick Altherr <[email protected]>
+L:	[email protected] (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 <[email protected]>
 L:	[email protected] (moderated for non-subscribers)

2.14.1

Thanks for the submission. I am happy to merge these in to the OpenBMC tree while the review is ongoing upstream. Please cc me on the upstream patches so I can assist with review.

Convention is moving to use SPDX-License-Identifier tags for new files instead of spelling out the GPL licence message. Please consider updating your patches to use these tags before you send out v3.

Finally, please follow the tips in our documentation on adding a branch to the subject line:

https://github.com/openbmc/linux/wiki/SubmittingPatches#use-the-git-tools

git format-patch -v3 --subject-prefix="PATCH linux dev-4.13" ...

This is only for submissions to the OpenBMC tree.

I noticed you're sending through your work mail server, but from your gmail address. This might cause delivery problems, I recommend using the gmail SMTP servers instead.

Cheers,

Joel

Hi Joel,

Thanks for you comments

modify on v3

Sorry it will take some time because our IT is on HANUKA holiday (meanwhile i will continue to send it the through my work mail server)