ARM: exynos3: Add Exynos3's machine_desc structure to support Device Tree

This patch add Exynos4's machine desc structure to support Device Tree.
The dt driver of Exynos3 SoC include dt compatible string of Exynos3250.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

5 files changed, 71 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 5ef335237e6..537153b2181 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -433,6 +433,20 @@ endif
 
 comment "Flattened Device Tree based board for EXYNOS SoCs"
 
+config MACH_EXYNOS3_DT
+	bool "Samsung Exynos3 Machine using device tree"
+	depends on ARCH_EXYNOS3
+	select ARM_AMBA
+	select CLKSRC_OF
+	select SOC_EXYNOS3250
+	select USE_OF
+	select TIZEN_WIP
+	help
+	  Machine support for Samsung Exynos3 machine with device tree enabled.
+	  Select this if a fdt blob is available for the Exynos3 SoC based board.
+	  Note: This is under development and not all peripherals can be supported
+	  with this machine file.
+
 config MACH_EXYNOS4_DT
 	bool "Samsung Exynos4 Machine using device tree"
 	depends on ARCH_EXYNOS4
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 9f6844cf498..636e54181f3 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_MACH_ORIGEN)		+= mach-origen.o
 obj-$(CONFIG_MACH_SMDK4212)		+= mach-smdk4x12.o
 obj-$(CONFIG_MACH_SMDK4412)		+= mach-smdk4x12.o
 
+obj-$(CONFIG_MACH_EXYNOS3_DT)		+= mach-exynos3-dt.o
 obj-$(CONFIG_MACH_EXYNOS4_DT)		+= mach-exynos4-dt.o
 obj-$(CONFIG_MACH_EXYNOS5_DT)		+= mach-exynos5-dt.o
 
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 20b98e05418..a68da003299 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -601,6 +601,13 @@ static unsigned int max_combiner_nr(void)
 		return EXYNOS4210_MAX_COMBINER_NR;
 }
 
+void __init exynos3_init_irq(void)
+{
+#ifdef CONFIG_OF
+	irqchip_init();
+#endif
+	gic_arch_extn.irq_set_wake = s3c_irq_wake;
+}
 
 void __init exynos4_init_irq(void)
 {
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index eeed0c56403..ebe1158dc53 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -20,6 +20,7 @@ extern unsigned long xxti_f, xusbxti_f;
 
 struct map_desc;
 void exynos_init_io(struct map_desc *mach_desc, int size);
+void exynos3_init_irq(void);
 void exynos4_init_irq(void);
 void exynos5_init_irq(void);
 void exynos4_restart(char mode, const char *cmd);
diff --git a/arch/arm/mach-exynos/mach-exynos3-dt.c b/arch/arm/mach-exynos/mach-exynos3-dt.c
new file mode 100644
index 00000000000..c329031c082
--- /dev/null
+++ b/arch/arm/mach-exynos/mach-exynos3-dt.c
@@ -0,0 +1,48 @@
+/*
+ * Samsung's EXYNOS3 flattened device tree enabled machine
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2010-2011 Linaro Ltd.
+ *		www.linaro.org
+ *
+ * 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/of_platform.h>
+#include <linux/serial_core.h>
+#include <linux/clocksource.h>
+
+#include <asm/mach/arch.h>
+
+#include "common.h"
+
+static void __init exynos3_dt_map_io(void)
+{
+	exynos_init_io(NULL, 0);
+}
+
+static void __init exynos3_dt_machine_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static char const *exynos3_dt_compat[] __initdata = {
+	"samsung,exynos3250",
+	NULL
+};
+
+DT_MACHINE_START(EXYNOS3250_DT, "Samsung Exynos3 (Flattened Device Tree)")
+	.smp		= smp_ops(exynos_smp_ops),
+	.init_irq	= exynos3_init_irq,
+	.map_io		= exynos3_dt_map_io,
+	.init_early	= exynos_firmware_init,
+	.init_machine	= exynos3_dt_machine_init,
+	.init_late	= exynos_init_late,
+	.init_time	= exynos_init_time,
+	.dt_compat	= exynos3_dt_compat,
+	.restart        = exynos4_restart,
+MACHINE_END