Commit 6436b6a7 authored by Abhilash Kesavan's avatar Abhilash Kesavan Committed by Kukjin Kim
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ARM: S3C2416: Add Power Management support for SMDK2416



Adds suspend-to-ram support for SMDK2416 based on existing 2412 PM code
Signed-off-by: default avatarAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: default avatarSangbeom Kim <sbkim73@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent e0e451ea
......@@ -118,6 +118,8 @@
#define S3C2443_SCLKCON_UARTCLK (1<<8)
#define S3C2443_SCLKCON_USBHOST (1<<1)
#define S3C2443_PWRCFG_SLEEP (1<<15)
#include <asm/div64.h>
static inline unsigned int
......
......@@ -25,6 +25,11 @@ config S3C2416_DMA
help
Internal config node for S3C2416 DMA support
config S3C2416_PM
bool
help
Internal config node to apply S3C2416 power management
menu "S3C2416 Machines"
config MACH_SMDK2416
......@@ -33,6 +38,7 @@ config MACH_SMDK2416
select S3C_DEV_FB
select S3C_DEV_HSMMC
select S3C_DEV_HSMMC1
select S3C2416_PM if PM
help
Say Y here if you are using an SMDK2416
......
......@@ -11,7 +11,7 @@ obj- :=
obj-$(CONFIG_CPU_S3C2416) += s3c2416.o clock.o
obj-$(CONFIG_CPU_S3C2416) += irq.o
obj-$(CONFIG_S3C2416_PM) += pm.o
#obj-$(CONFIG_S3C2416_DMA) += dma.o
# Machine support
......
......@@ -243,6 +243,8 @@ static int __init s3c2416_irq_add(struct sys_device *sysdev)
static struct sysdev_driver s3c2416_irq_driver = {
.add = s3c2416_irq_add,
.suspend = s3c24xx_irq_suspend,
.resume = s3c24xx_irq_resume,
};
static int __init s3c2416_irq_init(void)
......
/* linux/arch/arm/mach-s3c2416/pm.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
*
* 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/sysdev.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
#include <mach/regs-power.h>
#include <mach/regs-s3c2443-clock.h>
#include <plat/cpu.h>
#include <plat/pm.h>
extern void s3c2412_sleep_enter(void);
static void s3c2416_cpu_suspend(void)
{
flush_cache_all();
/* enable wakeup sources regardless of battery state */
__raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
/* set the mode as sleep, 2BED represents "Go to BED" */
__raw_writel(0x2BED, S3C2443_PWRMODE);
s3c2412_sleep_enter();
}
static void s3c2416_pm_prepare(void)
{
/*
* write the magic value u-boot uses to check for resume into
* the INFORM0 register, and ensure INFORM1 is set to the
* correct address to resume from.
*/
__raw_writel(0x2BED, S3C2412_INFORM0);
__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
}
static int s3c2416_pm_add(struct sys_device *sysdev)
{
pm_cpu_prep = s3c2416_pm_prepare;
pm_cpu_sleep = s3c2416_cpu_suspend;
return 0;
}
static int s3c2416_pm_suspend(struct sys_device *dev, pm_message_t state)
{
return 0;
}
static int s3c2416_pm_resume(struct sys_device *dev)
{
/* unset the return-from-sleep amd inform flags */
__raw_writel(0x0, S3C2443_PWRMODE);
__raw_writel(0x0, S3C2412_INFORM0);
__raw_writel(0x0, S3C2412_INFORM1);
return 0;
}
static struct sysdev_driver s3c2416_pm_driver = {
.add = s3c2416_pm_add,
.suspend = s3c2416_pm_suspend,
.resume = s3c2416_pm_resume,
};
static __init int s3c2416_pm_init(void)
{
return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_pm_driver);
}
arch_initcall(s3c2416_pm_init);
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