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ARM: S3C64XX: Bypass legacy initialization when booting with DT

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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>
This commit is contained in:
Tomasz Figa
2013-08-26 02:37:34 +09:00
committed by Kukjin Kim
parent 81e9c1794f
commit c836c90e27
6 changed files with 59 additions and 1 deletions
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12
arch/arm/mach-s3c64xx/common.c
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@@ -14,6 +14,10 @@
* 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/init.h>
#include <linux/module.h>
@@ -203,6 +207,10 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
static __init int s3c64xx_dev_init(void)
{
/* Not applicable when using DT. */
if (of_have_populated_dt())
return 0;
subsys_system_register(&s3c64xx_subsys, NULL);
return device_register(&s3c64xx_dev);
}
@@ -404,6 +412,10 @@ static int __init s3c64xx_init_irq_eint(void)
{
int irq;
/* On DT-enabled systems EINTs are handled by pinctrl-s3c64xx driver. */
if (of_have_populated_dt())
return -ENODEV;
for (irq = IRQ_EINT(0); irq <= IRQ_EINT(27); irq++) {
irq_set_chip_and_handler(irq, &s3c_irq_eint, handle_level_irq);
irq_set_chip_data(irq, (void *)eint_irq_to_bit(irq));