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Magnus Dammf14c4f12010-07-27 08:14:35 +00001/*
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/platform_device.h>
18#include <linux/clk.h>
19#include <linux/sh_clk.h>
20#include <linux/bitmap.h>
Rafael J. Wysocki1d2b71f2011-04-29 00:36:53 +020021#include <linux/slab.h>
Magnus Dammf14c4f12010-07-27 08:14:35 +000022
23#ifdef CONFIG_PM_RUNTIME
Magnus Dammf14c4f12010-07-27 08:14:35 +000024
Rafael J. Wysocki38ade3a2011-04-29 00:36:21 +020025static int default_platform_runtime_idle(struct device *dev)
Magnus Dammf14c4f12010-07-27 08:14:35 +000026{
27 /* suspend synchronously to disable clocks immediately */
28 return pm_runtime_suspend(dev);
29}
30
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020031static struct dev_pm_domain default_pm_domain = {
Rafael J. Wysocki38ade3a2011-04-29 00:36:21 +020032 .ops = {
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +020033 .runtime_suspend = pm_clk_suspend,
34 .runtime_resume = pm_clk_resume,
Rafael J. Wysocki38ade3a2011-04-29 00:36:21 +020035 .runtime_idle = default_platform_runtime_idle,
36 USE_PLATFORM_PM_SLEEP_OPS
37 },
38};
39
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020040#define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain)
Magnus Dammf14c4f12010-07-27 08:14:35 +000041
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020042#else
Magnus Dammf14c4f12010-07-27 08:14:35 +000043
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020044#define DEFAULT_PM_DOMAIN_PTR NULL
Magnus Dammf14c4f12010-07-27 08:14:35 +000045
46#endif /* CONFIG_PM_RUNTIME */
47
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020048static struct pm_clk_notifier_block platform_bus_notifier = {
Rafael J. Wysocki564b9052011-06-23 01:52:55 +020049 .pm_domain = DEFAULT_PM_DOMAIN_PTR,
Rafael J. Wysocki85eb8c82011-04-30 00:25:44 +020050 .con_ids = { NULL, },
Magnus Dammf14c4f12010-07-27 08:14:35 +000051};
52
53static int __init sh_pm_runtime_init(void)
54{
Rafael J. Wysocki3d5c3032011-07-01 22:13:44 +020055 pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
Magnus Dammf14c4f12010-07-27 08:14:35 +000056 return 0;
57}
58core_initcall(sh_pm_runtime_init);
Magnus Damm999a4d22011-07-10 10:38:34 +020059
60void (*shmobile_runtime_pm_late_init)(void);
61
62static int __init sh_pm_runtime_late_init(void)
63{
64 if (shmobile_runtime_pm_late_init)
65 shmobile_runtime_pm_late_init();
66 return 0;
67}
68late_initcall(sh_pm_runtime_late_init);