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- /* linux/arch/arm/mach-s3c2410/pm.c
- *
- * Copyright (c) 2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <linux/init.h>
- #include <linux/suspend.h>
- #include <linux/errno.h>
- #include <linux/time.h>
- #include <linux/sysdev.h>
- #include <asm/hardware.h>
- #include <asm/io.h>
- #include <asm/mach-types.h>
- #include <asm/arch/regs-gpio.h>
- #include <asm/arch/regs-s3c6410-clock.h>
- #include <asm/arch/regs-rtc.h>
- #include <asm/plat-s3c24xx/cpu.h>
- #include <asm/plat-s3c24xx/pm.h>
- #ifdef CONFIG_S3C2410_PM_DEBUG
- extern void pm_dbg(const char *fmt, ...);
- #define DBG(fmt...) pm_dbg(fmt)
- #else
- #define DBG(fmt...) printk(KERN_DEBUG fmt)
- #endif
- static void s3c6400_cpu_suspend(void)
- {
- unsigned long tmp;
- /* 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, 5\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 s3c6400_pm_prepare(void)
- {
- }
- static int s3c6400_pm_add(struct sys_device *sysdev)
- {
- pm_cpu_prep = s3c6400_pm_prepare;
- pm_cpu_sleep = s3c6400_cpu_suspend;
- return 0;
- }
- static struct sleep_save s3c6400_sleep[] = {
- };
- static int s3c6400_pm_suspend(struct sys_device *dev, pm_message_t state)
- {
- s3c2410_pm_do_save(s3c6400_sleep, ARRAY_SIZE(s3c6400_sleep));
- return 0;
- }
- static int s3c6400_pm_resume(struct sys_device *dev)
- {
- unsigned long tmp;
- #if 0
- tmp = __raw_readl(S3C_PWR_CFG);
- tmp &= ~(0x60<<0);
- tmp |= (0x1<<5);
- __raw_writel(tmp, S3C_PWR_CFG);
- #endif
- s3c2410_pm_do_restore(s3c6400_sleep, ARRAY_SIZE(s3c6400_sleep));
- return 0;
- }
- static struct sysdev_driver s3c6400_pm_driver = {
- .add = s3c6400_pm_add,
- .suspend = s3c6400_pm_suspend,
- .resume = s3c6400_pm_resume,
- };
- static __init int s3c6400_pm_init(void)
- {
- return sysdev_driver_register(&s3c6400_sysclass, &s3c6400_pm_driver);
- }
- arch_initcall(s3c6400_pm_init);
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