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

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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>
This commit is contained in:
Kukjin Kim 2012-02-10 13:13:15 +09:00
parent 23f16c7b7c
commit b3e68fb17a
3 changed files with 89 additions and 1 deletions
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11
arch/arm/mach-exynos/Kconfig
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@ -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"

1
arch/arm/mach-exynos/Makefile
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@ -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

78
arch/arm/mach-exynos/mach-exynos5-dt.c Normal file
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@ -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