linux-kernel - [PATCH 1/5] ARM: vexpress/mps2: introduce MPS2 platform

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Message-Id: <1461574157-23580-2-git-send-email-vladimir.murzin@arm.com>
Date:	Mon, 25 Apr 2016 09:49:13 +0100
From:	Vladimir Murzin <vladimir.murzin@....com>
To:	sudeep.holla@....com
Cc:	liviu.dudau@....com, lorenzo.pieralisi@....com, arnd@...db.de,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] ARM: vexpress/mps2: introduce MPS2 platform

The Cortex-M Prototyping System (or V2M-MPS2) is designed for
prototyping and evaluation Cortex-M family of processors including the
latest Cortex-M7

It comes with a range of useful peripherals including 8MB single cycle
SRAM, 16MB PSRAM, Ethernet, QSVGA touch screen panel, 4bit RGB VGA
connector, Audio, SPI and GPIO.

Signed-off-by: Vladimir Murzin <vladimir.murzin@....com>
---
 arch/arm/Kconfig                     |   12 ++++++++++++
 arch/arm/Makefile                    |    1 +
 arch/arm/mach-vexpress/Makefile      |    4 +++-
 arch/arm/mach-vexpress/Makefile.boot |    3 +++
 arch/arm/mach-vexpress/v2m-mps2.c    |   21 +++++++++++++++++++++
 5 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/mach-vexpress/Makefile.boot
 create mode 100644 arch/arm/mach-vexpress/v2m-mps2.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cdfa6c2..6cda5dc 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -892,6 +892,18 @@ config MACH_STM32F429
 	depends on ARCH_STM32
 	default y
 
+config ARCH_MPS2
+	bool "ARM MPS2 paltform"
+	depends on ARM_SINGLE_ARMV7M
+	select ARM_AMBA
+	select CLKSRC_MPS2
+	help
+	  Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
+	  with a range of available cores like Cortex-M3/M4/M7.
+
+	  Please, note that depends which Application Note is used memory map
+	  for the platform may vary, so adjustment of RAM base might be needed.
+
 # Definitions to make life easier
 config ARCH_ACORN
 	bool
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 8c3ce2a..274e8a6 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -183,6 +183,7 @@ machine-$(CONFIG_ARCH_LPC18XX)		+= lpc18xx
 machine-$(CONFIG_ARCH_LPC32XX)		+= lpc32xx
 machine-$(CONFIG_ARCH_MESON)		+= meson
 machine-$(CONFIG_ARCH_MMP)		+= mmp
+machine-$(CONFIG_ARCH_MPS2)		+= vexpress
 machine-$(CONFIG_ARCH_MOXART)		+= moxart
 machine-$(CONFIG_ARCH_MV78XX0)		+= mv78xx0
 machine-$(CONFIG_ARCH_MVEBU)		+= mvebu
diff --git a/arch/arm/mach-vexpress/Makefile b/arch/arm/mach-vexpress/Makefile
index f5c1006..73caae7 100644
--- a/arch/arm/mach-vexpress/Makefile
+++ b/arch/arm/mach-vexpress/Makefile
@@ -4,7 +4,7 @@
 ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := \
 	-I$(srctree)/arch/arm/plat-versatile/include
 
-obj-y					:= v2m.o
+obj-$(CONFIG_ARCH_VEXPRESS)		:= v2m.o
 obj-$(CONFIG_ARCH_VEXPRESS_DCSCB)	+= dcscb.o	dcscb_setup.o
 CFLAGS_dcscb.o				+= -march=armv7-a
 CFLAGS_REMOVE_dcscb.o			= -pg
@@ -15,3 +15,5 @@ CFLAGS_tc2_pm.o				+= -march=armv7-a
 CFLAGS_REMOVE_tc2_pm.o			= -pg
 obj-$(CONFIG_SMP)			+= platsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o
+
+obj-$(CONFIG_ARCH_MPS2)			+= v2m-mps2.o
diff --git a/arch/arm/mach-vexpress/Makefile.boot b/arch/arm/mach-vexpress/Makefile.boot
new file mode 100644
index 0000000..eacfc3f
--- /dev/null
+++ b/arch/arm/mach-vexpress/Makefile.boot
@@ -0,0 +1,3 @@
+# Empty file waiting for deletion once Makefile.boot isn't needed any more.
+# Patch waits for application at
+# http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .
diff --git a/arch/arm/mach-vexpress/v2m-mps2.c b/arch/arm/mach-vexpress/v2m-mps2.c
new file mode 100644
index 0000000..e7ad9c2
--- /dev/null
+++ b/arch/arm/mach-vexpress/v2m-mps2.c
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2015 ARM Limited
+ *
+ * Author: Vladimir Murzin <vladimir.murzin@....com>
+ *
+ * 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 <asm/mach/arch.h>
+
+static const char *const mps2_compat[] __initconst = {
+	"arm,mps2",
+	NULL
+};
+
+DT_MACHINE_START(MPS2DT, "MPS2 (Device Tree Support)")
+	.dt_compat = mps2_compat,
+MACHINE_END
-- 
1.7.9.5