2 * CPUIdle support code for SH-Mobile ARM
4 * Copyright (C) 2011 Magnus Damm
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/cpuidle.h>
13 #include <linux/suspend.h>
14 #include <linux/module.h>
15 #include <linux/err.h>
16 #include <asm/system.h>
19 static void shmobile_enter_wfi(void)
24 void (*shmobile_cpuidle_modes[CPUIDLE_STATE_MAX])(void) = {
25 shmobile_enter_wfi, /* regular sleep mode */
28 static int shmobile_cpuidle_enter(struct cpuidle_device *dev,
29 struct cpuidle_driver *drv,
32 ktime_t before, after;
39 shmobile_cpuidle_modes[index]();
45 dev->last_residency = ktime_to_ns(ktime_sub(after, before)) >> 10;
50 static struct cpuidle_device shmobile_cpuidle_dev;
51 static struct cpuidle_driver shmobile_cpuidle_driver = {
52 .name = "shmobile_cpuidle",
58 .target_residency = 1 * 2,
59 .flags = CPUIDLE_FLAG_TIME_VALID,
61 .safe_state_index = 0, /* C1 */
65 void (*shmobile_cpuidle_setup)(struct cpuidle_driver *drv);
67 static int shmobile_cpuidle_init(void)
69 struct cpuidle_device *dev = &shmobile_cpuidle_dev;
70 struct cpuidle_driver *drv = &shmobile_cpuidle_driver;
73 for (i = 0; i < CPUIDLE_STATE_MAX; i++)
74 drv->states[i].enter = shmobile_cpuidle_enter;
76 if (shmobile_cpuidle_setup)
77 shmobile_cpuidle_setup(drv);
79 cpuidle_register_driver(drv);
81 dev->state_count = drv->state_count;
82 cpuidle_register_device(dev);
86 late_initcall(shmobile_cpuidle_init);