ARM: imx: add support code for IMX50 based machines

Add machine support code for the Freescale IMX50 SoC.

The IMX50 is quite similar to the Freescale IMX53, and contains many of the
same periperhal hardware modules, at the same address offsets as the IMX53.
(Notable exceptions are that the IMX50 contains no CAN bus hardware, less
GPIO, no VPU, it does contain an Electrophoretic display controller though).

This support code uses some of the IMX53 setup code to reduce duplication
of what would be identical init IO setup.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/Makefile

@@ -112,6 +112,7 @@ obj-$(CONFIG_MACH_EUKREA_CPUIMX51SD) += mach-cpuimx51sd.o
 obj-$(CONFIG_MACH_EUKREA_MBIMXSD51_BASEBOARD) += eukrea_mbimxsd51-baseboard.o
 
 obj-$(CONFIG_MACH_IMX51_DT) += imx51-dt.o
+obj-$(CONFIG_SOC_IMX50) += mach-imx50.o
 obj-$(CONFIG_SOC_IMX53) += mach-imx53.o
 
 obj-$(CONFIG_SOC_VF610) += clk-vf610.o mach-vf610.o

arch/arm/mach-imx/common.h

@@ -108,6 +108,7 @@ void tzic_handle_irq(struct pt_regs *);
 #define imx27_handle_irq avic_handle_irq
 #define imx31_handle_irq avic_handle_irq
 #define imx35_handle_irq avic_handle_irq
+#define imx50_handle_irq tzic_handle_irq
 #define imx51_handle_irq tzic_handle_irq
 #define imx53_handle_irq tzic_handle_irq
 

arch/arm/mach-imx/mach-imx50.c

+/*
+ * Copyright 2013 Greg Ungerer <gerg@uclinux.org>
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * 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 <linux/of_platform.h>
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+static void __init imx50_dt_init(void)
+{
+	mxc_arch_reset_init_dt();
+
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char *imx50_dt_board_compat[] __initdata = {
+	"fsl,imx50",
+	NULL
+};
+
+DT_MACHINE_START(IMX50_DT, "Freescale i.MX50 (Device Tree Support)")
+	.map_io		= mx53_map_io,
+	.init_irq	= mx53_init_irq,
+	.handle_irq	= imx50_handle_irq,
+	.init_machine	= imx50_dt_init,
+	.dt_compat	= imx50_dt_board_compat,
+	.restart	= mxc_restart,
+MACHINE_END