blob: eb9f38d0aa58f3d13928923627d66512e3255c38 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/base/power/main.c - Where the driver meets power management.
3 *
4 * Copyright (c) 2003 Patrick Mochel
5 * Copyright (c) 2003 Open Source Development Lab
6 *
7 * This file is released under the GPLv2
8 *
9 *
10 * The driver model core calls device_pm_add() when a device is registered.
11 * This will intialize the embedded device_pm_info object in the device
12 * and add it to the list of power-controlled devices. sysfs entries for
13 * controlling device power management will also be added.
14 *
15 * A different set of lists than the global subsystem list are used to
16 * keep track of power info because we use different lists to hold
17 * devices based on what stage of the power management process they
18 * are in. The power domain dependencies may also differ from the
19 * ancestral dependencies that the subsystem list maintains.
20 */
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/device.h>
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070023#include <linux/mutex.h>
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "power.h"
26
27LIST_HEAD(dpm_active);
28LIST_HEAD(dpm_off);
29LIST_HEAD(dpm_off_irq);
30
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070031DEFINE_MUTEX(dpm_mtx);
32DEFINE_MUTEX(dpm_list_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
David Brownell075c1772007-04-26 00:12:06 -070034int (*platform_enable_wakeup)(struct device *dev, int is_on);
35
Rafael J. Wysocki9cddad72007-06-13 15:53:34 +020036int device_pm_add(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
38 int error;
39
40 pr_debug("PM: Adding info for %s:%s\n",
Dmitry Torokhovc48ea602007-04-11 01:37:18 -040041 dev->bus ? dev->bus->name : "No Bus",
42 kobject_name(&dev->kobj));
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070043 mutex_lock(&dpm_list_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 list_add_tail(&dev->power.entry, &dpm_active);
Rafael J. Wysocki9cddad72007-06-13 15:53:34 +020045 error = dpm_sysfs_add(dev);
46 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 list_del(&dev->power.entry);
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070048 mutex_unlock(&dpm_list_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 return error;
50}
51
Rafael J. Wysocki9cddad72007-06-13 15:53:34 +020052void device_pm_remove(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
54 pr_debug("PM: Removing info for %s:%s\n",
Dmitry Torokhovc48ea602007-04-11 01:37:18 -040055 dev->bus ? dev->bus->name : "No Bus",
56 kobject_name(&dev->kobj));
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070057 mutex_lock(&dpm_list_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 dpm_sysfs_remove(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 list_del_init(&dev->power.entry);
Matthias Kaehlcke11048dc2007-05-23 14:19:41 -070060 mutex_unlock(&dpm_list_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
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63