1/*
 2 * arch/arm/mach-shmobile/pm_runtime.c
 3 *
 4 * Runtime PM support code for SuperH Mobile ARM
 5 *
 6 *  Copyright (C) 2009-2010 Magnus Damm
 7 *
 8 * This file is subject to the terms and conditions of the GNU General Public
 9 * License.  See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12
13#include <linux/init.h>
14#include <linux/kernel.h>
15#include <linux/io.h>
16#include <linux/pm_runtime.h>
17#include <linux/pm_domain.h>
18#include <linux/platform_device.h>
19#include <linux/clk.h>
20#include <linux/sh_clk.h>
21#include <linux/bitmap.h>
22#include <linux/slab.h>
23
24#ifdef CONFIG_PM_RUNTIME
25
26static int default_platform_runtime_idle(struct device *dev)
27{
28	/* suspend synchronously to disable clocks immediately */
29	return pm_runtime_suspend(dev);
30}
31
32static struct dev_pm_domain default_pm_domain = {
33	.ops = {
34		.runtime_suspend = pm_clk_suspend,
35		.runtime_resume = pm_clk_resume,
36		.runtime_idle = default_platform_runtime_idle,
37		USE_PLATFORM_PM_SLEEP_OPS
38	},
39};
40
41#define DEFAULT_PM_DOMAIN_PTR	(&default_pm_domain)
42
43#else
44
45#define DEFAULT_PM_DOMAIN_PTR	NULL
46
47#endif /* CONFIG_PM_RUNTIME */
48
49static struct pm_clk_notifier_block platform_bus_notifier = {
50	.pm_domain = DEFAULT_PM_DOMAIN_PTR,
51	.con_ids = { NULL, },
52};
53
54static int __init sh_pm_runtime_init(void)
55{
56	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
57	return 0;
58}
59core_initcall(sh_pm_runtime_init);
60
61static int __init sh_pm_runtime_late_init(void)
62{
63	pm_genpd_poweroff_unused();
64	return 0;
65}
66late_initcall(sh_pm_runtime_late_init);