1/*
 2 * CPUIdle support code for SH-Mobile ARM
 3 *
 4 *  Copyright (C) 2011 Magnus Damm
 5 *
 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
 8 * for more details.
 9 */
10
11#include <linux/pm.h>
12#include <linux/cpuidle.h>
13#include <linux/suspend.h>
14#include <linux/module.h>
15#include <linux/err.h>
16#include <asm/cpuidle.h>
17#include <asm/io.h>
18
19static void shmobile_enter_wfi(void)
20{
21	cpu_do_idle();
22}
23
24void (*shmobile_cpuidle_modes[CPUIDLE_STATE_MAX])(void) = {
25	shmobile_enter_wfi, /* regular sleep mode */
26};
27
28static int shmobile_cpuidle_enter(struct cpuidle_device *dev,
29				  struct cpuidle_driver *drv,
30				  int index)
31{
32	shmobile_cpuidle_modes[index]();
33
34	return index;
35}
36
37static struct cpuidle_device shmobile_cpuidle_dev;
38static struct cpuidle_driver shmobile_cpuidle_driver = {
39	.name			= "shmobile_cpuidle",
40	.owner			= THIS_MODULE,
41	.en_core_tk_irqen	= 1,
42	.states[0]		= ARM_CPUIDLE_WFI_STATE,
43	.safe_state_index	= 0, /* C1 */
44	.state_count		= 1,
45};
46
47void (*shmobile_cpuidle_setup)(struct cpuidle_driver *drv);
48
49int shmobile_cpuidle_init(void)
50{
51	struct cpuidle_device *dev = &shmobile_cpuidle_dev;
52	struct cpuidle_driver *drv = &shmobile_cpuidle_driver;
53	int i;
54
55	for (i = 0; i < CPUIDLE_STATE_MAX; i++)
56		drv->states[i].enter = shmobile_cpuidle_enter;
57
58	if (shmobile_cpuidle_setup)
59		shmobile_cpuidle_setup(drv);
60
61	cpuidle_register_driver(drv);
62
63	dev->state_count = drv->state_count;
64	cpuidle_register_device(dev);
65
66	return 0;
67}