ARM: dts: add devicetree support for s3c2416-smdk2416

Definitions in s3c24xx.dtsi are usable for all s3c24xx
SoCs, but some need to be extended with proper compatible
properties, as can be seen in s3c2416.dtsi.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 104 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig
index f2f7088bfd22..e52d5e42af4e 100644
--- a/arch/arm/mach-s3c24xx/Kconfig
+++ b/arch/arm/mach-s3c24xx/Kconfig
@@ -490,6 +490,18 @@ config MACH_SMDK2416
 	help
 	  Say Y here if you are using an SMDK2416
 
+config MACH_S3C2416_DT
+	bool "Samsung S3C2416 machine using devicetree"
+	select CLKSRC_OF
+	select USE_OF
+	select PINCTRL
+	select PINCTRL_S3C24XX
+	help
+	  Machine support for Samsung S3C2416 machines with device tree enabled.
+	  Select this if a fdt blob is available for the S3C2416 SoC based board.
+	  Note: This is under development and not all peripherals can be supported
+	  with this machine file.
+
 endif	# CPU_S3C2416
 
 if CPU_S3C2440
diff --git a/arch/arm/mach-s3c24xx/Makefile b/arch/arm/mach-s3c24xx/Makefile
index 6f46ecfc8396..6de730bada4d 100644
--- a/arch/arm/mach-s3c24xx/Makefile
+++ b/arch/arm/mach-s3c24xx/Makefile
@@ -85,6 +85,7 @@ obj-$(CONFIG_MACH_SMDK2413)		+= mach-smdk2413.o
 obj-$(CONFIG_MACH_VSTMS)		+= mach-vstms.o
 
 obj-$(CONFIG_MACH_SMDK2416)		+= mach-smdk2416.o
+obj-$(CONFIG_MACH_S3C2416_DT)		+= mach-s3c2416-dt.o
 
 obj-$(CONFIG_MACH_ANUBIS)		+= mach-anubis.o
 obj-$(CONFIG_MACH_AT2440EVB)		+= mach-at2440evb.o
diff --git a/arch/arm/mach-s3c24xx/mach-s3c2416-dt.c b/arch/arm/mach-s3c24xx/mach-s3c2416-dt.c
new file mode 100644
index 000000000000..f5c9072e1e35
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/mach-s3c2416-dt.c
@@ -0,0 +1,91 @@
+/*
+ * Samsung's S3C2416 flattened device tree enabled machine
+ *
+ * Copyright (c) 2012 Heiko Stuebner <heiko@sntech.de>
+ *
+ * based on mach-exynos/mach-exynos4-dt.c
+ *
+ * Copyright (c) 2010-2011 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/clocksource.h>
+#include <linux/irqchip.h>
+#include <linux/of_platform.h>
+#include <linux/serial_core.h>
+
+#include <asm/mach/arch.h>
+#include <mach/map.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/regs-serial.h>
+
+#include "common.h"
+
+/*
+ * The following lookup table is used to override device names when devices
+ * are registered from device tree. This is temporarily added to enable
+ * device tree support addition for the S3C2416 architecture.
+ *
+ * For drivers that require platform data to be provided from the machine
+ * file, a platform data pointer can also be supplied along with the
+ * devices names. Usually, the platform data elements that cannot be parsed
+ * from the device tree by the drivers (example: function pointers) are
+ * supplied. But it should be noted that this is a temporary mechanism and
+ * at some point, the drivers should be capable of parsing all the platform
+ * data from the device tree.
+ */
+static const struct of_dev_auxdata s3c2416_auxdata_lookup[] __initconst = {
+	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C2410_PA_UART0,
+				"s3c2440-uart.0", NULL),
+	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C2410_PA_UART1,
+				"s3c2440-uart.1", NULL),
+	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C2410_PA_UART2,
+				"s3c2440-uart.2", NULL),
+	OF_DEV_AUXDATA("samsung,s3c2440-uart", S3C2443_PA_UART3,
+				"s3c2440-uart.3", NULL),
+	OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC0,
+				"s3c-sdhci.0", NULL),
+	OF_DEV_AUXDATA("samsung,s3c6410-sdhci", S3C_PA_HSMMC1,
+				"s3c-sdhci.1", NULL),
+	OF_DEV_AUXDATA("samsung,s3c2440-i2c", S3C_PA_IIC,
+				"s3c2440-i2c.0", NULL),
+	{},
+};
+
+static void __init s3c2416_dt_map_io(void)
+{
+	s3c24xx_init_io(NULL, 0);
+	s3c24xx_init_clocks(12000000);
+}
+
+static void __init s3c2416_dt_machine_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table,
+				s3c2416_auxdata_lookup, NULL);
+
+	s3c_pm_init();
+}
+
+static char const *s3c2416_dt_compat[] __initdata = {
+	"samsung,s3c2416",
+	"samsung,s3c2450",
+	NULL
+};
+
+DT_MACHINE_START(S3C2416_DT, "Samsung S3C2416 (Flattened Device Tree)")
+	/* Maintainer: Heiko Stuebner <heiko@sntech.de> */
+	.dt_compat	= s3c2416_dt_compat,
+	.map_io		= s3c2416_dt_map_io,
+	.init_irq	= irqchip_init,
+	.init_machine	= s3c2416_dt_machine_init,
+	 .init_time	= clocksource_of_init,
+	.restart	= s3c2416_restart,
+MACHINE_END