ARM: S3C64XX: Add board file for boot using Device Tree

This patch adds board file that will be used to boot S3C64xx-based boards
using Device Tree.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 102 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index 041da5172423..bd14e3a37128 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -306,3 +306,19 @@ config MACH_WLF_CRAGG_6410
         select SAMSUNG_GPIO_EXTRA128
         help
           Machine support for the Wolfson Cragganmore S3C6410 variant.
+
+config MACH_S3C64XX_DT
+        bool "Samsung S3C6400/S3C6410 machine using Device Tree"
+        select CLKSRC_OF
+        select CPU_S3C6400
+        select CPU_S3C6410
+        select PINCTRL
+        select PINCTRL_S3C64XX
+        select USE_OF
+        help
+          Machine support for Samsung S3C6400/S3C6410 machines with Device Tree
+          enabled.
+          Select this if a fdt blob is available for your S3C64XX SoC based
+          board.
+          Note: This is under development and not all peripherals can be
+          supported with this machine file.
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index 645a8fe55f8d..6faedcffce04 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -57,3 +57,4 @@ obj-$(CONFIG_MACH_SMARTQ7)		+= mach-smartq7.o
 obj-$(CONFIG_MACH_SMDK6400)             += mach-smdk6400.o
 obj-$(CONFIG_MACH_SMDK6410)             += mach-smdk6410.o
 obj-$(CONFIG_MACH_WLF_CRAGG_6410)       += mach-crag6410.o mach-crag6410-module.o
+obj-$(CONFIG_MACH_S3C64XX_DT)           += mach-s3c64xx-dt.o
diff --git a/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c b/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c
new file mode 100644
index 000000000000..7eb9a10fc1af
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c
@@ -0,0 +1,85 @@
+/*
+ * Samsung's S3C64XX flattened device tree enabled machine
+ *
+ * Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.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 <linux/clk-provider.h>
+#include <linux/irqchip.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/system_misc.h>
+
+#include <plat/cpu.h>
+#include <plat/watchdog-reset.h>
+
+#include <mach/map.h>
+
+#include "common.h"
+
+/*
+ * IO mapping for shared system controller IP.
+ *
+ * FIXME: Make remaining drivers use dynamic mapping.
+ */
+static struct map_desc s3c64xx_dt_iodesc[] __initdata = {
+        {
+                .virtual        = (unsigned long)S3C_VA_SYS,
+                .pfn            = __phys_to_pfn(S3C64XX_PA_SYSCON),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        },
+};
+
+static void __init s3c64xx_dt_map_io(void)
+{
+        debug_ll_io_init();
+        iotable_init(s3c64xx_dt_iodesc, ARRAY_SIZE(s3c64xx_dt_iodesc));
+
+        s3c64xx_init_cpu();
+
+        if (!soc_is_s3c64xx())
+                panic("SoC is not S3C64xx!");
+}
+
+static void __init s3c64xx_dt_init_irq(void)
+{
+        of_clk_init(NULL);
+        samsung_wdt_reset_of_init();
+        irqchip_init();
+};
+
+static void __init s3c64xx_dt_init_machine(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static void s3c64xx_dt_restart(enum reboot_mode mode, const char *cmd)
+{
+        if (mode != REBOOT_SOFT)
+                samsung_wdt_reset();
+
+        /* if all else fails, or mode was for soft, jump to 0 */
+        soft_restart(0);
+}
+
+static char const *s3c64xx_dt_compat[] __initdata = {
+        "samsung,s3c6400",
+        "samsung,s3c6410",
+        NULL
+};
+
+DT_MACHINE_START(S3C6400_DT, "Samsung S3C64xx (Flattened Device Tree)")
+        /* Maintainer: Tomasz Figa <tomasz.figa@gmail.com> */
+        .dt_compat      = s3c64xx_dt_compat,
+        .map_io         = s3c64xx_dt_map_io,
+        .init_irq       = s3c64xx_dt_init_irq,
+        .init_machine   = s3c64xx_dt_init_machine,
+        .restart        = s3c64xx_dt_restart,
+MACHINE_END