projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 6436b6a7 AK |
1 | /* linux/arch/arm/mach-s3c2416/pm.c |
| 2 | * | |
| 3 | * Copyright (c) 2010 Samsung Electronics Co., Ltd. | |
| 4 | * http://www.samsung.com | |
| 5 | * | |
| 6 | * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support) | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/sysdev.h> | |
| 14 | #include <linux/io.h> | |
| 15 | ||
| 16 | #include <asm/cacheflush.h> | |
| 17 | ||
| 18 | #include <mach/regs-power.h> | |
| 19 | #include <mach/regs-s3c2443-clock.h> | |
| 20 | ||
| 21 | #include <plat/cpu.h> | |
| 22 | #include <plat/pm.h> | |
| 23 | ||
| 24 | extern void s3c2412_sleep_enter(void); | |
| 25 | ||
| 26 | static void s3c2416_cpu_suspend(void) | |
| 27 | { | |
| 28 | flush_cache_all(); | |
| 29 | ||
| 30 | /* enable wakeup sources regardless of battery state */ | |
| 31 | __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG); | |
| 32 | ||
| 33 | /* set the mode as sleep, 2BED represents "Go to BED" */ | |
| 34 | __raw_writel(0x2BED, S3C2443_PWRMODE); | |
| 35 | ||
| 36 | s3c2412_sleep_enter(); | |
| 37 | } | |
| 38 | ||
| 39 | static void s3c2416_pm_prepare(void) | |
| 40 | { | |
| 41 | /* | |
| 42 | * write the magic value u-boot uses to check for resume into | |
| 43 | * the INFORM0 register, and ensure INFORM1 is set to the | |
| 44 | * correct address to resume from. | |
| 45 | */ | |
| 46 | __raw_writel(0x2BED, S3C2412_INFORM0); | |
| 47 | __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1); | |
| 48 | } | |
| 49 | ||
| 50 | static int s3c2416_pm_add(struct sys_device *sysdev) | |
| 51 | { | |
| 52 | pm_cpu_prep = s3c2416_pm_prepare; | |
| 53 | pm_cpu_sleep = s3c2416_cpu_suspend; | |
| 54 | ||
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | static int s3c2416_pm_suspend(struct sys_device *dev, pm_message_t state) | |
| 59 | { | |
| 60 | return 0; | |
| 61 | } | |
| 62 | ||
| 63 | static int s3c2416_pm_resume(struct sys_device *dev) | |
| 64 | { | |
| 65 | /* unset the return-from-sleep amd inform flags */ | |
| 66 | __raw_writel(0x0, S3C2443_PWRMODE); | |
| 67 | __raw_writel(0x0, S3C2412_INFORM0); | |
| 68 | __raw_writel(0x0, S3C2412_INFORM1); | |
| 69 | ||
| 70 | return 0; | |
| 71 | } | |
| 72 | ||
| 73 | static struct sysdev_driver s3c2416_pm_driver = { | |
| 74 | .add = s3c2416_pm_add, | |
| 75 | .suspend = s3c2416_pm_suspend, | |
| 76 | .resume = s3c2416_pm_resume, | |
| 77 | }; | |
| 78 | ||
| 79 | static __init int s3c2416_pm_init(void) | |
| 80 | { | |
| 81 | return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_pm_driver); | |
| 82 | } | |
| 83 | ||
| 84 | arch_initcall(s3c2416_pm_init); |