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Magnus Dammf14c4f12010-07-27 08:14:35 +00001/*
Paul Mundtd03299e2011-11-11 15:58:50 +09002 * Runtime PM support code
Magnus Dammf14c4f12010-07-27 08:14:35 +00003 *
4 * Copyright (C) 2009-2010 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/init.h>
12#include <linux/kernel.h>
13#include <linux/io.h>
14#include <linux/pm_runtime.h>
Rafael J. Wysocki79620412011-07-13 12:32:07 +020015#include <linux/pm_domain.h>
Rafael J. Wysockib5e8d262011-08-25 15:34:19 +020016#include <linux/pm_clock.h>
Magnus Dammf14c4f12010-07-27 08:14:35 +000017#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
Magnus Damm999a4d22011-07-10 10:38:34 +020060static int __init sh_pm_runtime_late_init(void)
61{
Rafael J. Wysocki79620412011-07-13 12:32:07 +020062 pm_genpd_poweroff_unused();
Magnus Damm999a4d22011-07-10 10:38:34 +020063 return 0;
64}
65late_initcall(sh_pm_runtime_late_init);