ARM: EXYNOS: add support device tree enabled board file for EXYNOS5

This patch adds a new EXYNOS5 compatible device tree enabled board
When using this, a corresponding device tree blob which describes the
board's properties should be supplied at boot time to the kernel.

Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
new file mode 100644
index 000000000000..0d26f50081ad
--- /dev/null
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -0,0 +1,78 @@
+/*
+ * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.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/of_platform.h>
+#include <linux/serial_core.h>
+
+#include <asm/mach/arch.h>
+#include <asm/hardware/gic.h>
+#include <mach/map.h>
+
+#include <plat/cpu.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 EXYNOS5 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 exynos5250_auxdata_lookup[] __initconst = {
+	OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
+				"exynos4210-uart.0", NULL),
+	OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
+				"exynos4210-uart.1", NULL),
+	OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
+				"exynos4210-uart.2", NULL),
+	OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
+				"exynos4210-uart.3", NULL),
+	OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
+	OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
+	OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.2", NULL),
+	{},
+};
+
+static void __init exynos5250_dt_map_io(void)
+{
+	exynos_init_io(NULL, 0);
+	s3c24xx_init_clocks(24000000);
+}
+
+static void __init exynos5250_dt_machine_init(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table,
+				exynos5250_auxdata_lookup, NULL);
+}
+
+static char const *exynos5250_dt_compat[] __initdata = {
+	"samsung,exynos5250",
+	NULL
+};
+
+DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
+	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
+	.init_irq	= exynos5_init_irq,
+	.map_io		= exynos5250_dt_map_io,
+	.handle_irq	= gic_handle_irq,
+	.init_machine	= exynos5250_dt_machine_init,
+	.timer		= &exynos4_timer,
+	.dt_compat	= exynos5250_dt_compat,
+	.restart        = exynos5_restart,
+MACHINE_END