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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

arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h

+2 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-s3c2416/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-s3c2416/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-s3c2416/irq.c

+2 −0
Original line number Diff line number Diff line
@@ -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)

arch/arm/mach-s3c2416/pm.c

0 → 100644
+84 −0
Original line number Diff line number Diff line 
/* 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);