projects / deliverable / linux.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 | ||
| 4a858cfc | 13 | #include <linux/device.h> |
| bb072c3c | 14 | #include <linux/syscore_ops.h> |
| 6436b6a7 AK |
15 | #include <linux/io.h> |
| 16 | ||
| 17 | #include <asm/cacheflush.h> | |
| 18 | ||
| 19 | #include <mach/regs-power.h> | |
| 20 | #include <mach/regs-s3c2443-clock.h> | |
| 21 | ||
| 22 | #include <plat/cpu.h> | |
| 23 | #include <plat/pm.h> | |
| 24 | ||
| 25 | extern void s3c2412_sleep_enter(void); | |
| 26 | ||
| 29cb3cd2 | 27 | static int s3c2416_cpu_suspend(unsigned long arg) |
| 6436b6a7 | 28 | { |
| 6436b6a7 AK |
29 | /* enable wakeup sources regardless of battery state */ |
| 30 | __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG); | |
| 31 | ||
| 32 | /* set the mode as sleep, 2BED represents "Go to BED" */ | |
| 33 | __raw_writel(0x2BED, S3C2443_PWRMODE); | |
| 34 | ||
| 35 | s3c2412_sleep_enter(); | |
| 29cb3cd2 RK |
36 | |
| 37 | panic("sleep resumed to originator?"); | |
| 6436b6a7 AK |
38 | } |
| 39 | ||
| 40 | static void s3c2416_pm_prepare(void) | |
| 41 | { | |
| 42 | /* | |
| 43 | * write the magic value u-boot uses to check for resume into | |
| 44 | * the INFORM0 register, and ensure INFORM1 is set to the | |
| 45 | * correct address to resume from. | |
| 46 | */ | |
| 47 | __raw_writel(0x2BED, S3C2412_INFORM0); | |
| 48 | __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1); | |
| 49 | } | |
| 50 | ||
| 04511a6f | 51 | static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif) |
| 6436b6a7 AK |
52 | { |
| 53 | pm_cpu_prep = s3c2416_pm_prepare; | |
| 54 | pm_cpu_sleep = s3c2416_cpu_suspend; | |
| 55 | ||
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 4a858cfc KS |
59 | static struct subsys_interface s3c2416_pm_interface = { |
| 60 | .name = "s3c2416_pm", | |
| 61 | .subsys = &s3c2416_subsys, | |
| 62 | .add_dev = s3c2416_pm_add, | |
| bb072c3c RW |
63 | }; |
| 64 | ||
| 65 | static __init int s3c2416_pm_init(void) | |
| 6436b6a7 | 66 | { |
| 4a858cfc | 67 | return subsys_interface_register(&s3c2416_pm_interface); |
| 6436b6a7 AK |
68 | } |
| 69 | ||
| bb072c3c RW |
70 | arch_initcall(s3c2416_pm_init); |
| 71 | ||
| 72 | ||
| 73 | static void s3c2416_pm_resume(void) | |
| 6436b6a7 AK |
74 | { |
| 75 | /* unset the return-from-sleep amd inform flags */ | |
| 76 | __raw_writel(0x0, S3C2443_PWRMODE); | |
| 77 | __raw_writel(0x0, S3C2412_INFORM0); | |
| 78 | __raw_writel(0x0, S3C2412_INFORM1); | |
| 6436b6a7 AK |
79 | } |
| 80 | ||
| bb072c3c | 81 | struct syscore_ops s3c2416_pm_syscore_ops = { |
| 6436b6a7 AK |
82 | .resume = s3c2416_pm_resume, |
| 83 | }; |