linux/arch/arm/mach-s3c64xx/s3c6400.c
Tomasz Figa c836c90e27 ARM: S3C64XX: Bypass legacy initialization when booting with DT
This patch allows bypassing most of legacy initialization when booting
an S3C64xx-based board using device tree, by adding conditional checks
for DT presence to initcalls which are no longer necessary when booting
with DT..

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-09-17 06:48:27 +09:00

99 lines
2.1 KiB
C

/* linux/arch/arm/mach-s3c64xx/cpu.c
*
* Copyright 2009 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* 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.
*/
/*
* NOTE: Code in this file is not used when booting with Device Tree support.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <plat/cpu-freq.h>
#include <plat/regs-serial.h>
#include <mach/regs-clock.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/clock.h>
#include <plat/sdhci.h>
#include <plat/iic-core.h>
#include <plat/onenand-core.h>
#include "common.h"
void __init s3c6400_map_io(void)
{
/* setup SDHCI */
s3c6400_default_sdhci0();
s3c6400_default_sdhci1();
s3c6400_default_sdhci2();
/* the i2c devices are directly compatible with s3c2440 */
s3c_i2c0_setname("s3c2440-i2c");
s3c_device_nand.name = "s3c6400-nand";
s3c_onenand_setname("s3c6400-onenand");
s3c64xx_onenand1_setname("s3c6400-onenand");
}
void __init s3c6400_init_irq(void)
{
/* VIC0 does not have IRQS 5..7,
* VIC1 is fully populated. */
s3c64xx_init_irq(~0 & ~(0xf << 5), ~0);
}
static struct bus_type s3c6400_subsys = {
.name = "s3c6400-core",
.dev_name = "s3c6400-core",
};
static struct device s3c6400_dev = {
.bus = &s3c6400_subsys,
};
static int __init s3c6400_core_init(void)
{
/* Not applicable when using DT. */
if (of_have_populated_dt())
return 0;
return subsys_system_register(&s3c6400_subsys, NULL);
}
core_initcall(s3c6400_core_init);
int __init s3c6400_init(void)
{
printk("S3C6400: Initialising architecture\n");
return device_register(&s3c6400_dev);
}