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Commit b3e68fb1 authored by Kukjin Kim's avatar Kukjin Kim
Browse files

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: default avatarKukjin Kim <kgene.kim@samsung.com>
parent 23f16c7b

arch/arm/mach-exynos/Kconfig

+10 −1
Original line number Diff line number Diff line
@@ -362,7 +362,7 @@ config MACH_SMDK4412 
	  Machine support for Samsung SMDK4412

endif



comment "Flattened Device Tree based board for Exynos4 based SoC"

comment "Flattened Device Tree based board for EXYNOS SoCs"



config MACH_EXYNOS4_DT

	bool "Samsung Exynos4 Machine using device tree"
@@ -376,6 +376,15 @@ config MACH_EXYNOS4_DT 
	  Note: This is under development and not all peripherals can be supported

	  with this machine file.



config MACH_EXYNOS5_DT

	bool "SAMSUNG EXYNOS5 Machine using device tree"

	select SOC_EXYNOS5250

	select USE_OF

	select ARM_AMBA

	help

	  Machine support for Samsung Exynos4 machine with device tree enabled.

	  Select this if a fdt blob is available for the EXYNOS4 SoC based board.



if ARCH_EXYNOS4



comment "Configuration for HSMMC 8-bit bus width"

arch/arm/mach-exynos/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ obj-$(CONFIG_MACH_SMDK4212) += mach-smdk4x12.o 
obj-$(CONFIG_MACH_SMDK4412)		+= mach-smdk4x12.o



obj-$(CONFIG_MACH_EXYNOS4_DT)		+= mach-exynos4-dt.o

obj-$(CONFIG_MACH_EXYNOS5_DT)		+= mach-exynos5-dt.o



# device support

arch/arm/mach-exynos/mach-exynos5-dt.c

0 → 100644
+78 −0
Original line number Diff line number Diff line 
/*

 * 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