Commit 4b053e7a authored by Ben Dooks's avatar Ben Dooks Committed by Russell King

[ARM] 3858/1: S3C2412: power management code

Add S3C2412 power management code, and move the
core register saving in from s3c2412.c
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent da56c949
...@@ -176,6 +176,13 @@ config CPU_S3C2412_ONLY ...@@ -176,6 +176,13 @@ config CPU_S3C2412_ONLY
!CPU_S3C2440 && !CPU_S3C2442 && CPU_S3C2412 !CPU_S3C2440 && !CPU_S3C2442 && CPU_S3C2412
default y if CPU_S3C2412 default y if CPU_S3C2412
config S3C2412_PM
bool
default y if PM
depends on CPU_S3C2412
help
Internal config node to apply S3C2412 power management
config CPU_S3C2412 config CPU_S3C2412
bool bool
depends on ARCH_S3C2410 depends on ARCH_S3C2410
......
...@@ -38,6 +38,8 @@ obj-$(CONFIG_CPU_S3C2412) += s3c2412-irq.o ...@@ -38,6 +38,8 @@ obj-$(CONFIG_CPU_S3C2412) += s3c2412-irq.o
obj-$(CONFIG_CPU_S3C2412) += s3c2412-clock.o obj-$(CONFIG_CPU_S3C2412) += s3c2412-clock.o
obj-dma-$(CONFIG_CPU_S3C2412) += s3c2412-dma.o obj-dma-$(CONFIG_CPU_S3C2412) += s3c2412-dma.o
obj-$(CONFIG_S3C2412_PM) += s3c2412-pm.o
# #
# S3C244X support # S3C244X support
......
/* linux/arch/arm/mach-s3c2410/s3c2412-pm.c
*
* Copyright (c) 2006 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.
*/
#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/sysdev.h>
#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/arch/regs-power.h>
#include <asm/arch/regs-gpioj.h>
#include <asm/arch/regs-gpio.h>
#include <asm/arch/regs-dsc.h>
#include "cpu.h"
#include "pm.h"
#include "s3c2412.h"
static void s3c2412_cpu_suspend(void)
{
unsigned long tmp;
/* set our standby method to sleep */
tmp = __raw_readl(S3C2412_PWRCFG);
tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
__raw_writel(tmp, S3C2412_PWRCFG);
/* issue the standby signal into the pm unit. Note, we
* issue a write-buffer drain just in case */
tmp = 0;
asm("b 1f\n\t"
".align 5\n\t"
"1:\n\t"
"mcr p15, 0, %0, c7, c10, 4\n\t"
"mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
/* we should never get past here */
panic("sleep resumed to originator?");
}
static void s3c2412_pm_prepare(void)
{
}
static int s3c2412_pm_add(struct sys_device *sysdev)
{
pm_cpu_prep = s3c2412_pm_prepare;
pm_cpu_sleep = s3c2412_cpu_suspend;
return 0;
}
static struct sleep_save s3c2412_sleep[] = {
SAVE_ITEM(S3C2412_DSC0),
SAVE_ITEM(S3C2412_DSC1),
SAVE_ITEM(S3C2413_GPJDAT),
SAVE_ITEM(S3C2413_GPJCON),
SAVE_ITEM(S3C2413_GPJUP),
/* save the PWRCFG to get back to original sleep method */
SAVE_ITEM(S3C2412_PWRCFG),
/* save the sleep configuration anyway, just in case these
* get damaged during wakeup */
SAVE_ITEM(S3C2412_GPBSLPCON),
SAVE_ITEM(S3C2412_GPCSLPCON),
SAVE_ITEM(S3C2412_GPDSLPCON),
SAVE_ITEM(S3C2412_GPESLPCON),
SAVE_ITEM(S3C2412_GPFSLPCON),
SAVE_ITEM(S3C2412_GPGSLPCON),
SAVE_ITEM(S3C2412_GPHSLPCON),
SAVE_ITEM(S3C2413_GPJSLPCON),
};
static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
{
s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
static int s3c2412_pm_resume(struct sys_device *dev)
{
unsigned long tmp;
tmp = __raw_readl(S3C2412_PWRCFG);
tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
__raw_writel(tmp, S3C2412_PWRCFG);
s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
static struct sysdev_driver s3c2412_pm_driver = {
.add = s3c2412_pm_add,
.suspend = s3c2412_pm_suspend,
.resume = s3c2412_pm_resume,
};
static __init int s3c2412_pm_init(void)
{
return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_pm_driver);
}
arch_initcall(s3c2412_pm_init);
...@@ -158,48 +158,8 @@ void __init s3c2412_init_clocks(int xtal) ...@@ -158,48 +158,8 @@ void __init s3c2412_init_clocks(int xtal)
* as a driver which may support both 2410 and 2440 may try and use it. * as a driver which may support both 2410 and 2440 may try and use it.
*/ */
#ifdef CONFIG_PM
static struct sleep_save s3c2412_sleep[] = {
SAVE_ITEM(S3C2412_DSC0),
SAVE_ITEM(S3C2412_DSC1),
SAVE_ITEM(S3C2413_GPJDAT),
SAVE_ITEM(S3C2413_GPJCON),
SAVE_ITEM(S3C2413_GPJUP),
/* save the sleep configuration anyway, just in case these
* get damaged during wakeup */
SAVE_ITEM(S3C2412_GPBSLPCON),
SAVE_ITEM(S3C2412_GPCSLPCON),
SAVE_ITEM(S3C2412_GPDSLPCON),
SAVE_ITEM(S3C2412_GPESLPCON),
SAVE_ITEM(S3C2412_GPFSLPCON),
SAVE_ITEM(S3C2412_GPGSLPCON),
SAVE_ITEM(S3C2412_GPHSLPCON),
SAVE_ITEM(S3C2413_GPJSLPCON),
};
static int s3c2412_suspend(struct sys_device *dev, pm_message_t state)
{
s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
static int s3c2412_resume(struct sys_device *dev)
{
s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
#else
#define s3c2412_suspend NULL
#define s3c2412_resume NULL
#endif
struct sysdev_class s3c2412_sysclass = { struct sysdev_class s3c2412_sysclass = {
set_kset_name("s3c2412-core"), set_kset_name("s3c2412-core"),
.suspend = s3c2412_suspend,
.resume = s3c2412_resume
}; };
static int __init s3c2412_core_init(void) static int __init s3c2412_core_init(void)
......
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