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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * pm.h - Power management interface
3 *
4 * Copyright (C) 2000 Andrew Henroid
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#ifndef _LINUX_PM_H
22#define _LINUX_PM_H
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/list.h>
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +020025#include <linux/workqueue.h>
26#include <linux/spinlock.h>
27#include <linux/wait.h>
28#include <linux/timer.h>
Rafael J. Wysocki5af84b82010-01-23 22:23:32 +010029#include <linux/completion.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 * Callbacks for platform drivers to implement.
33 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070034extern void (*pm_power_off)(void);
Rafael J. Wysockibd804eb2007-07-19 01:47:40 -070035extern void (*pm_power_off_prepare)(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Jesse Barnesf43f6272013-02-04 13:37:20 +000037struct device; /* we have a circular dep with device.h */
38#ifdef CONFIG_VT_CONSOLE_SLEEP
39extern void pm_vt_switch_required(struct device *dev, bool required);
40extern void pm_vt_switch_unregister(struct device *dev);
41#else
42static inline void pm_vt_switch_required(struct device *dev, bool required)
43{
44}
45static inline void pm_vt_switch_unregister(struct device *dev)
46{
47}
48#endif /* CONFIG_VT_CONSOLE_SLEEP */
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/*
51 * Device power management
52 */
53
54struct device;
55
Alan Stern7490e442010-09-25 23:35:15 +020056#ifdef CONFIG_PM
57extern const char power_group_name[]; /* = "power" */
58#else
59#define power_group_name NULL
60#endif
61
Pavel Machekca078ba2005-09-03 15:56:57 -070062typedef struct pm_message {
63 int event;
64} pm_message_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Rafael J. Wysocki1eede072008-05-20 23:00:01 +020066/**
Rafael J. Wysockiadf09492008-10-06 22:46:05 +020067 * struct dev_pm_ops - device PM callbacks
Rafael J. Wysocki1eede072008-05-20 23:00:01 +020068 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +010069 * Several device power state transitions are externally visible, affecting
David Brownell82bb67f2006-08-14 23:11:04 -070070 * the state of pending I/O queues and (for drivers that touch hardware)
71 * interrupts, wakeups, DMA, and other hardware state. There may also be
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +010072 * internal transitions to various low-power modes which are transparent
David Brownell82bb67f2006-08-14 23:11:04 -070073 * to the rest of the driver stack (such as a driver that's ON gating off
74 * clocks which are not in active use).
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +010076 * The externally visible transitions are handled with the help of callbacks
77 * included in this structure in such a way that two levels of callbacks are
78 * involved. First, the PM core executes callbacks provided by PM domains,
79 * device types, classes and bus types. They are the subsystem-level callbacks
80 * supposed to execute callbacks provided by device drivers, although they may
81 * choose not to do that. If the driver callbacks are executed, they have to
82 * collaborate with the subsystem-level callbacks to achieve the goals
83 * appropriate for the given system transition, given transition phase and the
84 * subsystem the device belongs to.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +020085 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +010086 * @prepare: The principal role of this callback is to prevent new children of
87 * the device from being registered after it has returned (the driver's
88 * subsystem and generally the rest of the kernel is supposed to prevent
89 * new calls to the probe method from being made too once @prepare() has
90 * succeeded). If @prepare() detects a situation it cannot handle (e.g.
91 * registration of a child already in progress), it may return -EAGAIN, so
92 * that the PM core can execute it once again (e.g. after a new child has
93 * been registered) to recover from the race condition.
94 * This method is executed for all kinds of suspend transitions and is
95 * followed by one of the suspend callbacks: @suspend(), @freeze(), or
96 * @poweroff(). The PM core executes subsystem-level @prepare() for all
97 * devices before starting to invoke suspend callbacks for any of them, so
98 * generally devices may be assumed to be functional or to respond to
99 * runtime resume requests while @prepare() is being executed. However,
100 * device drivers may NOT assume anything about the availability of user
101 * space at that time and it is NOT valid to request firmware from within
102 * @prepare() (it's too late to do that). It also is NOT valid to allocate
103 * substantial amounts of memory from @prepare() in the GFP_KERNEL mode.
104 * [To work around these limitations, drivers may register suspend and
105 * hibernation notifiers to be executed before the freezing of tasks.]
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200106 *
107 * @complete: Undo the changes made by @prepare(). This method is executed for
108 * all kinds of resume transitions, following one of the resume callbacks:
109 * @resume(), @thaw(), @restore(). Also called if the state transition
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100110 * fails before the driver's suspend callback: @suspend(), @freeze() or
111 * @poweroff(), can be executed (e.g. if the suspend callback fails for one
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200112 * of the other devices that the PM core has unsuccessfully attempted to
113 * suspend earlier).
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100114 * The PM core executes subsystem-level @complete() after it has executed
115 * the appropriate resume callbacks for all devices.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200116 *
117 * @suspend: Executed before putting the system into a sleep state in which the
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100118 * contents of main memory are preserved. The exact action to perform
119 * depends on the device's subsystem (PM domain, device type, class or bus
120 * type), but generally the device must be quiescent after subsystem-level
121 * @suspend() has returned, so that it doesn't do any I/O or DMA.
122 * Subsystem-level @suspend() is executed for all devices after invoking
123 * subsystem-level @prepare() for all of them.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200124 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100125 * @suspend_late: Continue operations started by @suspend(). For a number of
126 * devices @suspend_late() may point to the same callback routine as the
127 * runtime suspend callback.
128 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200129 * @resume: Executed after waking the system up from a sleep state in which the
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100130 * contents of main memory were preserved. The exact action to perform
131 * depends on the device's subsystem, but generally the driver is expected
132 * to start working again, responding to hardware events and software
133 * requests (the device itself may be left in a low-power state, waiting
134 * for a runtime resume to occur). The state of the device at the time its
135 * driver's @resume() callback is run depends on the platform and subsystem
136 * the device belongs to. On most platforms, there are no restrictions on
137 * availability of resources like clocks during @resume().
138 * Subsystem-level @resume() is executed for all devices after invoking
139 * subsystem-level @resume_noirq() for all of them.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200140 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100141 * @resume_early: Prepare to execute @resume(). For a number of devices
142 * @resume_early() may point to the same callback routine as the runtime
143 * resume callback.
144 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200145 * @freeze: Hibernation-specific, executed before creating a hibernation image.
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100146 * Analogous to @suspend(), but it should not enable the device to signal
147 * wakeup events or change its power state. The majority of subsystems
148 * (with the notable exception of the PCI bus type) expect the driver-level
149 * @freeze() to save the device settings in memory to be used by @restore()
150 * during the subsequent resume from hibernation.
151 * Subsystem-level @freeze() is executed for all devices after invoking
152 * subsystem-level @prepare() for all of them.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200153 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100154 * @freeze_late: Continue operations started by @freeze(). Analogous to
155 * @suspend_late(), but it should not enable the device to signal wakeup
156 * events or change its power state.
157 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200158 * @thaw: Hibernation-specific, executed after creating a hibernation image OR
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100159 * if the creation of an image has failed. Also executed after a failing
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200160 * attempt to restore the contents of main memory from such an image.
161 * Undo the changes made by the preceding @freeze(), so the device can be
162 * operated in the same way as immediately before the call to @freeze().
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100163 * Subsystem-level @thaw() is executed for all devices after invoking
164 * subsystem-level @thaw_noirq() for all of them. It also may be executed
165 * directly after @freeze() in case of a transition error.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200166 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100167 * @thaw_early: Prepare to execute @thaw(). Undo the changes made by the
168 * preceding @freeze_late().
169 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200170 * @poweroff: Hibernation-specific, executed after saving a hibernation image.
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100171 * Analogous to @suspend(), but it need not save the device's settings in
172 * memory.
173 * Subsystem-level @poweroff() is executed for all devices after invoking
174 * subsystem-level @prepare() for all of them.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200175 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100176 * @poweroff_late: Continue operations started by @poweroff(). Analogous to
177 * @suspend_late(), but it need not save the device's settings in memory.
178 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200179 * @restore: Hibernation-specific, executed after restoring the contents of main
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100180 * memory from a hibernation image, analogous to @resume().
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200181 *
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100182 * @restore_early: Prepare to execute @restore(), analogous to @resume_early().
183 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100184 * @suspend_noirq: Complete the actions started by @suspend(). Carry out any
185 * additional operations required for suspending the device that might be
186 * racing with its driver's interrupt handler, which is guaranteed not to
187 * run while @suspend_noirq() is being executed.
188 * It generally is expected that the device will be in a low-power state
189 * (appropriate for the target system sleep state) after subsystem-level
190 * @suspend_noirq() has returned successfully. If the device can generate
191 * system wakeup signals and is enabled to wake up the system, it should be
192 * configured to do so at that time. However, depending on the platform
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100193 * and device's subsystem, @suspend() or @suspend_late() may be allowed to
194 * put the device into the low-power state and configure it to generate
195 * wakeup signals, in which case it generally is not necessary to define
196 * @suspend_noirq().
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200197 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100198 * @resume_noirq: Prepare for the execution of @resume() by carrying out any
199 * operations required for resuming the device that might be racing with
200 * its driver's interrupt handler, which is guaranteed not to run while
201 * @resume_noirq() is being executed.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200202 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100203 * @freeze_noirq: Complete the actions started by @freeze(). Carry out any
204 * additional operations required for freezing the device that might be
205 * racing with its driver's interrupt handler, which is guaranteed not to
206 * run while @freeze_noirq() is being executed.
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100207 * The power state of the device should not be changed by either @freeze(),
208 * or @freeze_late(), or @freeze_noirq() and it should not be configured to
209 * signal system wakeup by any of these callbacks.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200210 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100211 * @thaw_noirq: Prepare for the execution of @thaw() by carrying out any
212 * operations required for thawing the device that might be racing with its
213 * driver's interrupt handler, which is guaranteed not to run while
214 * @thaw_noirq() is being executed.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200215 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100216 * @poweroff_noirq: Complete the actions started by @poweroff(). Analogous to
217 * @suspend_noirq(), but it need not save the device's settings in memory.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200218 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100219 * @restore_noirq: Prepare for the execution of @restore() by carrying out any
220 * operations required for thawing the device that might be racing with its
221 * driver's interrupt handler, which is guaranteed not to run while
222 * @restore_noirq() is being executed. Analogous to @resume_noirq().
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200223 *
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200224 * All of the above callbacks, except for @complete(), return error codes.
225 * However, the error codes returned by the resume operations, @resume(),
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100226 * @thaw(), @restore(), @resume_noirq(), @thaw_noirq(), and @restore_noirq(), do
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200227 * not cause the PM core to abort the resume transition during which they are
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100228 * returned. The error codes returned in those cases are only printed by the PM
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200229 * core to the system logs for debugging purposes. Still, it is recommended
230 * that drivers only return error codes from their resume methods in case of an
231 * unrecoverable failure (i.e. when the device being handled refuses to resume
232 * and becomes unusable) to allow us to modify the PM core in the future, so
233 * that it can avoid attempting to handle devices that failed to resume and
234 * their children.
235 *
236 * It is allowed to unregister devices while the above callbacks are being
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100237 * executed. However, a callback routine must NOT try to unregister the device
238 * it was called for, although it may unregister children of that device (for
239 * example, if it detects that a child was unplugged while the system was
240 * asleep).
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200241 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100242 * Refer to Documentation/power/devices.txt for more information about the role
243 * of the above callbacks in the system suspend process.
244 *
245 * There also are callbacks related to runtime power management of devices.
246 * Again, these callbacks are executed by the PM core only for subsystems
247 * (PM domains, device types, classes and bus types) and the subsystem-level
248 * callbacks are supposed to invoke the driver callbacks. Moreover, the exact
249 * actions to be performed by a device driver's callbacks generally depend on
250 * the platform and subsystem the device belongs to.
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200251 *
252 * @runtime_suspend: Prepare the device for a condition in which it won't be
253 * able to communicate with the CPU(s) and RAM due to power management.
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100254 * This need not mean that the device should be put into a low-power state.
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200255 * For example, if the device is behind a link which is about to be turned
256 * off, the device may remain at full power. If the device does go to low
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100257 * power and is capable of generating runtime wakeup events, remote wakeup
258 * (i.e., a hardware mechanism allowing the device to request a change of
259 * its power state via an interrupt) should be enabled for it.
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200260 *
261 * @runtime_resume: Put the device into the fully active state in response to a
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100262 * wakeup event generated by hardware or at the request of software. If
263 * necessary, put the device into the full-power state and restore its
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200264 * registers, so that it is fully operational.
265 *
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100266 * @runtime_idle: Device appears to be inactive and it might be put into a
Geert Uytterhoeven651665d2014-03-17 21:26:11 +0100267 * low-power state if all of the necessary conditions are satisfied.
268 * Check these conditions, and return 0 if it's appropriate to let the PM
269 * core queue a suspend request for the device.
Rafael J. Wysockif7bc83d2011-11-23 21:20:32 +0100270 *
271 * Refer to Documentation/power/runtime_pm.txt for more information about the
272 * role of the above callbacks in device runtime power management.
273 *
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200274 */
275
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200276struct dev_pm_ops {
277 int (*prepare)(struct device *dev);
278 void (*complete)(struct device *dev);
279 int (*suspend)(struct device *dev);
280 int (*resume)(struct device *dev);
281 int (*freeze)(struct device *dev);
282 int (*thaw)(struct device *dev);
283 int (*poweroff)(struct device *dev);
284 int (*restore)(struct device *dev);
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100285 int (*suspend_late)(struct device *dev);
286 int (*resume_early)(struct device *dev);
287 int (*freeze_late)(struct device *dev);
288 int (*thaw_early)(struct device *dev);
289 int (*poweroff_late)(struct device *dev);
290 int (*restore_early)(struct device *dev);
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200291 int (*suspend_noirq)(struct device *dev);
292 int (*resume_noirq)(struct device *dev);
293 int (*freeze_noirq)(struct device *dev);
294 int (*thaw_noirq)(struct device *dev);
295 int (*poweroff_noirq)(struct device *dev);
296 int (*restore_noirq)(struct device *dev);
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200297 int (*runtime_suspend)(struct device *dev);
298 int (*runtime_resume)(struct device *dev);
299 int (*runtime_idle)(struct device *dev);
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200300};
301
Rafael J. Wysockid690b2c2010-03-06 21:28:37 +0100302#ifdef CONFIG_PM_SLEEP
303#define SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
304 .suspend = suspend_fn, \
305 .resume = resume_fn, \
306 .freeze = suspend_fn, \
307 .thaw = resume_fn, \
308 .poweroff = suspend_fn, \
309 .restore = resume_fn,
310#else
311#define SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
312#endif
313
Ulf Hanssonf78c4cf2013-12-10 14:37:42 +0100314#ifdef CONFIG_PM_SLEEP
315#define SET_LATE_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
316 .suspend_late = suspend_fn, \
317 .resume_early = resume_fn, \
318 .freeze_late = suspend_fn, \
319 .thaw_early = resume_fn, \
320 .poweroff_late = suspend_fn, \
321 .restore_early = resume_fn,
322#else
323#define SET_LATE_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
324#endif
325
Rafael J. Wysockid690b2c2010-03-06 21:28:37 +0100326#ifdef CONFIG_PM_RUNTIME
327#define SET_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
328 .runtime_suspend = suspend_fn, \
329 .runtime_resume = resume_fn, \
330 .runtime_idle = idle_fn,
331#else
332#define SET_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn)
333#endif
334
Ulf Hanssond9fb5632013-12-10 14:37:40 +0100335#ifdef CONFIG_PM
336#define SET_PM_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
337 .runtime_suspend = suspend_fn, \
338 .runtime_resume = resume_fn, \
339 .runtime_idle = idle_fn,
340#else
341#define SET_PM_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn)
342#endif
343
Albin Tonnerre9d62ec62009-08-05 23:59:59 +0200344/*
345 * Use this if you want to use the same suspend and resume callbacks for suspend
346 * to RAM and hibernation.
347 */
348#define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
Alexey Dobriyan47145212009-12-14 18:00:08 -0800349const struct dev_pm_ops name = { \
Rafael J. Wysockid690b2c2010-03-06 21:28:37 +0100350 SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
Albin Tonnerre9d62ec62009-08-05 23:59:59 +0200351}
352
Rafael J. Wysockid690b2c2010-03-06 21:28:37 +0100353/*
354 * Use this for defining a set of PM operations to be used in all situations
Lad, Prabhakar3e54d152014-02-20 13:30:32 +0530355 * (system suspend, hibernation or runtime PM).
Rafael J. Wysockic4882522012-02-13 16:29:47 +0100356 * NOTE: In general, system suspend callbacks, .suspend() and .resume(), should
357 * be different from the corresponding runtime PM callbacks, .runtime_suspend(),
358 * and .runtime_resume(), because .runtime_suspend() always works on an already
359 * quiescent device, while .suspend() should assume that the device may be doing
360 * something when it is called (it should ensure that the device will be
361 * quiescent after it has returned). Therefore it's better to point the "late"
362 * suspend and "early" resume callback pointers, .suspend_late() and
363 * .resume_early(), to the same routines as .runtime_suspend() and
364 * .runtime_resume(), respectively (and analogously for hibernation).
Rafael J. Wysockid690b2c2010-03-06 21:28:37 +0100365 */
366#define UNIVERSAL_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
367const struct dev_pm_ops name = { \
368 SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
369 SET_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
370}
371
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200372/**
373 * PM_EVENT_ messages
374 *
375 * The following PM_EVENT_ messages are defined for the internal use of the PM
376 * core, in order to provide a mechanism allowing the high level suspend and
377 * hibernation code to convey the necessary information to the device PM core
378 * code:
379 *
380 * ON No transition.
381 *
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100382 * FREEZE System is going to hibernate, call ->prepare() and ->freeze()
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200383 * for all devices.
384 *
385 * SUSPEND System is going to suspend, call ->prepare() and ->suspend()
386 * for all devices.
387 *
388 * HIBERNATE Hibernation image has been saved, call ->prepare() and
389 * ->poweroff() for all devices.
390 *
391 * QUIESCE Contents of main memory are going to be restored from a (loaded)
392 * hibernation image, call ->prepare() and ->freeze() for all
393 * devices.
394 *
395 * RESUME System is resuming, call ->resume() and ->complete() for all
396 * devices.
397 *
398 * THAW Hibernation image has been created, call ->thaw() and
399 * ->complete() for all devices.
400 *
401 * RESTORE Contents of main memory have been restored from a hibernation
402 * image, call ->restore() and ->complete() for all devices.
403 *
404 * RECOVER Creation of a hibernation image or restoration of the main
405 * memory contents from a hibernation image has failed, call
406 * ->thaw() and ->complete() for all devices.
Alan Stern8111d1b2008-07-23 21:28:37 -0700407 *
408 * The following PM_EVENT_ messages are defined for internal use by
409 * kernel subsystems. They are never issued by the PM core.
410 *
411 * USER_SUSPEND Manual selective suspend was issued by userspace.
412 *
413 * USER_RESUME Manual selective resume was issued by userspace.
414 *
415 * REMOTE_WAKEUP Remote-wakeup request was received from the device.
416 *
417 * AUTO_SUSPEND Automatic (device idle) runtime suspend was
418 * initiated by the subsystem.
419 *
420 * AUTO_RESUME Automatic (device needed) runtime resume was
421 * requested by a driver.
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200422 */
423
Rafael J. Wysocki1a9a9152011-09-29 22:29:44 +0200424#define PM_EVENT_INVALID (-1)
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200425#define PM_EVENT_ON 0x0000
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100426#define PM_EVENT_FREEZE 0x0001
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200427#define PM_EVENT_SUSPEND 0x0002
428#define PM_EVENT_HIBERNATE 0x0004
429#define PM_EVENT_QUIESCE 0x0008
430#define PM_EVENT_RESUME 0x0010
431#define PM_EVENT_THAW 0x0020
432#define PM_EVENT_RESTORE 0x0040
433#define PM_EVENT_RECOVER 0x0080
Alan Stern8111d1b2008-07-23 21:28:37 -0700434#define PM_EVENT_USER 0x0100
435#define PM_EVENT_REMOTE 0x0200
436#define PM_EVENT_AUTO 0x0400
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200437
Alan Stern8111d1b2008-07-23 21:28:37 -0700438#define PM_EVENT_SLEEP (PM_EVENT_SUSPEND | PM_EVENT_HIBERNATE)
439#define PM_EVENT_USER_SUSPEND (PM_EVENT_USER | PM_EVENT_SUSPEND)
440#define PM_EVENT_USER_RESUME (PM_EVENT_USER | PM_EVENT_RESUME)
Alan Stern7f4f5d42008-11-17 11:14:19 -0500441#define PM_EVENT_REMOTE_RESUME (PM_EVENT_REMOTE | PM_EVENT_RESUME)
Alan Stern8111d1b2008-07-23 21:28:37 -0700442#define PM_EVENT_AUTO_SUSPEND (PM_EVENT_AUTO | PM_EVENT_SUSPEND)
443#define PM_EVENT_AUTO_RESUME (PM_EVENT_AUTO | PM_EVENT_RESUME)
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200444
Rafael J. Wysocki1a9a9152011-09-29 22:29:44 +0200445#define PMSG_INVALID ((struct pm_message){ .event = PM_EVENT_INVALID, })
Alan Stern8111d1b2008-07-23 21:28:37 -0700446#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200447#define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
448#define PMSG_QUIESCE ((struct pm_message){ .event = PM_EVENT_QUIESCE, })
449#define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
450#define PMSG_HIBERNATE ((struct pm_message){ .event = PM_EVENT_HIBERNATE, })
451#define PMSG_RESUME ((struct pm_message){ .event = PM_EVENT_RESUME, })
452#define PMSG_THAW ((struct pm_message){ .event = PM_EVENT_THAW, })
453#define PMSG_RESTORE ((struct pm_message){ .event = PM_EVENT_RESTORE, })
454#define PMSG_RECOVER ((struct pm_message){ .event = PM_EVENT_RECOVER, })
Alan Stern7f4f5d42008-11-17 11:14:19 -0500455#define PMSG_USER_SUSPEND ((struct pm_message) \
Alan Stern8111d1b2008-07-23 21:28:37 -0700456 { .event = PM_EVENT_USER_SUSPEND, })
Alan Stern7f4f5d42008-11-17 11:14:19 -0500457#define PMSG_USER_RESUME ((struct pm_message) \
Alan Stern8111d1b2008-07-23 21:28:37 -0700458 { .event = PM_EVENT_USER_RESUME, })
Alan Stern7f4f5d42008-11-17 11:14:19 -0500459#define PMSG_REMOTE_RESUME ((struct pm_message) \
Alan Stern8111d1b2008-07-23 21:28:37 -0700460 { .event = PM_EVENT_REMOTE_RESUME, })
Alan Stern7f4f5d42008-11-17 11:14:19 -0500461#define PMSG_AUTO_SUSPEND ((struct pm_message) \
Alan Stern8111d1b2008-07-23 21:28:37 -0700462 { .event = PM_EVENT_AUTO_SUSPEND, })
Alan Stern7f4f5d42008-11-17 11:14:19 -0500463#define PMSG_AUTO_RESUME ((struct pm_message) \
Alan Stern8111d1b2008-07-23 21:28:37 -0700464 { .event = PM_EVENT_AUTO_RESUME, })
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200465
Alan Stern5b1b0b82011-08-19 23:49:48 +0200466#define PMSG_IS_AUTO(msg) (((msg).event & PM_EVENT_AUTO) != 0)
467
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200468/**
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200469 * Device run-time power management status.
470 *
471 * These status labels are used internally by the PM core to indicate the
472 * current status of a device with respect to the PM core operations. They do
473 * not reflect the actual power state of the device or its status as seen by the
474 * driver.
475 *
476 * RPM_ACTIVE Device is fully operational. Indicates that the device
477 * bus type's ->runtime_resume() callback has completed
478 * successfully.
479 *
480 * RPM_SUSPENDED Device bus type's ->runtime_suspend() callback has
481 * completed successfully. The device is regarded as
482 * suspended.
483 *
484 * RPM_RESUMING Device bus type's ->runtime_resume() callback is being
485 * executed.
486 *
487 * RPM_SUSPENDING Device bus type's ->runtime_suspend() callback is being
488 * executed.
489 */
490
491enum rpm_status {
492 RPM_ACTIVE = 0,
493 RPM_RESUMING,
494 RPM_SUSPENDED,
495 RPM_SUSPENDING,
496};
497
498/**
499 * Device run-time power management request types.
500 *
501 * RPM_REQ_NONE Do nothing.
502 *
503 * RPM_REQ_IDLE Run the device bus type's ->runtime_idle() callback
504 *
505 * RPM_REQ_SUSPEND Run the device bus type's ->runtime_suspend() callback
506 *
Alan Stern15bcb91d2010-09-25 23:35:21 +0200507 * RPM_REQ_AUTOSUSPEND Same as RPM_REQ_SUSPEND, but not until the device has
508 * been inactive for as long as power.autosuspend_delay
509 *
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200510 * RPM_REQ_RESUME Run the device bus type's ->runtime_resume() callback
511 */
512
513enum rpm_request {
514 RPM_REQ_NONE = 0,
515 RPM_REQ_IDLE,
516 RPM_REQ_SUSPEND,
Alan Stern15bcb91d2010-09-25 23:35:21 +0200517 RPM_REQ_AUTOSUSPEND,
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200518 RPM_REQ_RESUME,
519};
520
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200521struct wakeup_source;
522
Rafael J. Wysocki4605ab62011-08-25 15:34:12 +0200523struct pm_domain_data {
524 struct list_head list_node;
525 struct device *dev;
Rafael J. Wysocki4605ab62011-08-25 15:34:12 +0200526};
527
Rafael J. Wysocki5c095a02011-08-25 15:33:50 +0200528struct pm_subsys_data {
529 spinlock_t lock;
Rafael J. Wysockief27bed2011-08-25 15:34:01 +0200530 unsigned int refcount;
Rafael J. Wysocki5c095a02011-08-25 15:33:50 +0200531#ifdef CONFIG_PM_CLK
532 struct list_head clock_list;
533#endif
Rafael J. Wysocki4605ab62011-08-25 15:34:12 +0200534#ifdef CONFIG_PM_GENERIC_DOMAINS
Rafael J. Wysockicd0ea672011-09-26 20:22:02 +0200535 struct pm_domain_data *domain_data;
Rafael J. Wysocki4605ab62011-08-25 15:34:12 +0200536#endif
Rafael J. Wysocki5c095a02011-08-25 15:33:50 +0200537};
538
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200539struct dev_pm_info {
540 pm_message_t power_state;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200541 unsigned int can_wakeup:1;
Rafael J. Wysockib8c76f62010-12-16 00:51:21 +0100542 unsigned int async_suspend:1;
Alan Sternf76b168b2011-06-18 20:22:23 +0200543 bool is_prepared:1; /* Owned by the PM core */
Alan Stern6d0e0e82011-06-18 22:42:09 +0200544 bool is_suspended:1; /* Ditto */
Liu, Chuansheng3d2699b2014-02-18 10:28:44 +0800545 bool is_noirq_suspended:1;
546 bool is_late_suspended:1;
Rafael J. Wysocki8b258cc2011-11-17 21:39:33 +0100547 bool ignore_children:1;
Rafael J. Wysockibed2b422012-08-06 01:45:11 +0200548 bool early_init:1; /* Owned by the PM core */
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200549 spinlock_t lock;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200550#ifdef CONFIG_PM_SLEEP
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200551 struct list_head entry;
Rafael J. Wysocki5af84b82010-01-23 22:23:32 +0100552 struct completion completion;
Rafael J. Wysocki074037e2010-09-22 22:09:10 +0200553 struct wakeup_source *wakeup;
Rafael J. Wysocki4ca46ff2011-10-16 23:34:36 +0200554 bool wakeup_path:1;
Rafael J. Wysockifeb70af2012-08-13 14:00:25 +0200555 bool syscore:1;
Rafael J. Wysocki805bdae2011-02-24 11:10:01 +0100556#else
557 unsigned int should_wakeup:1;
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200558#endif
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200559#ifdef CONFIG_PM_RUNTIME
560 struct timer_list suspend_timer;
561 unsigned long timer_expires;
562 struct work_struct work;
563 wait_queue_head_t wait_queue;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200564 atomic_t usage_count;
565 atomic_t child_count;
566 unsigned int disable_depth:3;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200567 unsigned int idle_notification:1;
568 unsigned int request_pending:1;
569 unsigned int deferred_resume:1;
Rafael J. Wysocki7a1a8eb2009-12-03 21:19:18 +0100570 unsigned int run_wake:1;
Rafael J. Wysocki53823632010-01-23 22:02:51 +0100571 unsigned int runtime_auto:1;
Alan Stern7490e442010-09-25 23:35:15 +0200572 unsigned int no_callbacks:1;
Alan Sternc7b61de2010-12-01 00:14:42 +0100573 unsigned int irq_safe:1;
Alan Stern15bcb91d2010-09-25 23:35:21 +0200574 unsigned int use_autosuspend:1;
575 unsigned int timer_autosuspends:1;
Ming Leie8234072013-02-22 16:34:11 -0800576 unsigned int memalloc_noio:1;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200577 enum rpm_request request;
578 enum rpm_status runtime_status;
579 int runtime_error;
Alan Stern15bcb91d2010-09-25 23:35:21 +0200580 int autosuspend_delay;
581 unsigned long last_busy;
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +0200582 unsigned long active_jiffies;
583 unsigned long suspended_jiffies;
584 unsigned long accounting_timestamp;
Rafael J. Wysocki5e928f72009-08-18 23:38:32 +0200585#endif
Rafael J. Wysocki5c095a02011-08-25 15:33:50 +0200586 struct pm_subsys_data *subsys_data; /* Owned by the subsystem. */
Rafael J. Wysocki2d984ad2014-02-11 00:35:38 +0100587 void (*set_latency_tolerance)(struct device *, s32);
Rafael J. Wysocki5f986c52012-10-23 01:07:27 +0200588 struct dev_pm_qos *qos;
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200589};
590
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +0200591extern void update_pm_runtime_accounting(struct device *dev);
Rafael J. Wysockief27bed2011-08-25 15:34:01 +0200592extern int dev_pm_get_subsys_data(struct device *dev);
593extern int dev_pm_put_subsys_data(struct device *dev);
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +0200594
Rafael J. Wysocki7538e3d2011-02-16 21:53:17 +0100595/*
596 * Power domains provide callbacks that are executed during system suspend,
597 * hibernation, system resume and during runtime PM transitions along with
598 * subsystem-level and driver-level callbacks.
599 */
Rafael J. Wysocki564b9052011-06-23 01:52:55 +0200600struct dev_pm_domain {
Rafael J. Wysocki7538e3d2011-02-16 21:53:17 +0100601 struct dev_pm_ops ops;
602};
Arjan van de Ven8d4b9d12010-07-19 02:01:06 +0200603
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200604/*
605 * The PM_EVENT_ messages are also used by drivers implementing the legacy
606 * suspend framework, based on the ->suspend() and ->resume() callbacks common
607 * for suspend and hibernation transitions, according to the rules below.
608 */
609
610/* Necessary, because several drivers use PM_EVENT_PRETHAW */
611#define PM_EVENT_PRETHAW PM_EVENT_QUIESCE
612
613/*
David Brownell82bb67f2006-08-14 23:11:04 -0700614 * One transition is triggered by resume(), after a suspend() call; the
615 * message is implicit:
616 *
617 * ON Driver starts working again, responding to hardware events
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100618 * and software requests. The hardware may have gone through
619 * a power-off reset, or it may have maintained state from the
620 * previous suspend() which the driver will rely on while
621 * resuming. On most platforms, there are no restrictions on
622 * availability of resources like clocks during resume().
David Brownell82bb67f2006-08-14 23:11:04 -0700623 *
624 * Other transitions are triggered by messages sent using suspend(). All
625 * these transitions quiesce the driver, so that I/O queues are inactive.
626 * That commonly entails turning off IRQs and DMA; there may be rules
627 * about how to quiesce that are specific to the bus or the device's type.
628 * (For example, network drivers mark the link state.) Other details may
629 * differ according to the message:
630 *
631 * SUSPEND Quiesce, enter a low power device state appropriate for
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100632 * the upcoming system state (such as PCI_D3hot), and enable
633 * wakeup events as appropriate.
David Brownell82bb67f2006-08-14 23:11:04 -0700634 *
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +0100635 * HIBERNATE Enter a low power device state appropriate for the hibernation
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100636 * state (eg. ACPI S4) and enable wakeup events as appropriate.
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +0100637 *
David Brownell82bb67f2006-08-14 23:11:04 -0700638 * FREEZE Quiesce operations so that a consistent image can be saved;
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100639 * but do NOT otherwise enter a low power device state, and do
640 * NOT emit system wakeup events.
David Brownell82bb67f2006-08-14 23:11:04 -0700641 *
642 * PRETHAW Quiesce as if for FREEZE; additionally, prepare for restoring
Geert Uytterhoeven33fe0ad2014-03-17 21:26:10 +0100643 * the system from a snapshot taken after an earlier FREEZE.
644 * Some drivers will need to reset their hardware state instead
645 * of preserving it, to ensure that it's never mistaken for the
646 * state which that earlier snapshot had set up.
David Brownell82bb67f2006-08-14 23:11:04 -0700647 *
648 * A minimally power-aware driver treats all messages as SUSPEND, fully
649 * reinitializes its device during resume() -- whether or not it was reset
650 * during the suspend/resume cycle -- and can't issue wakeup events.
651 *
652 * More power-aware drivers may also use low power states at runtime as
653 * well as during system sleep states like PM_SUSPEND_STANDBY. They may
654 * be able to use wakeup events to exit from runtime low-power states,
655 * or from system low-power states such as standby or suspend-to-RAM.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 */
657
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200658#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockid47d81c2011-03-23 22:16:41 +0100659extern void device_pm_lock(void);
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100660extern void dpm_resume_start(pm_message_t state);
Alan Sternd1616302009-05-24 22:05:42 +0200661extern void dpm_resume_end(pm_message_t state);
Rafael J. Wysocki91e7c752011-05-17 23:26:00 +0200662extern void dpm_resume(pm_message_t state);
663extern void dpm_complete(pm_message_t state);
Rafael J. Wysocki1eede072008-05-20 23:00:01 +0200664
665extern void device_pm_unlock(void);
Rafael J. Wysockicf579df2012-01-29 20:38:29 +0100666extern int dpm_suspend_end(pm_message_t state);
Alan Sternd1616302009-05-24 22:05:42 +0200667extern int dpm_suspend_start(pm_message_t state);
Rafael J. Wysocki91e7c752011-05-17 23:26:00 +0200668extern int dpm_suspend(pm_message_t state);
669extern int dpm_prepare(pm_message_t state);
David Brownell0ac85242005-09-12 19:39:34 -0700670
Andrew Morton02669492006-03-23 01:38:34 -0800671extern void __suspend_report_result(const char *function, void *fn, int ret);
672
673#define suspend_report_result(fn, ret) \
674 do { \
Harvey Harrisond5c003b2008-10-15 22:01:24 -0700675 __suspend_report_result(__func__, fn, ret); \
Andrew Morton02669492006-03-23 01:38:34 -0800676 } while (0)
Andrew Morton9a7834d2005-10-23 23:02:20 -0700677
Rafael J. Wysocki098dff72010-09-22 22:10:57 +0200678extern int device_pm_wait_for_dev(struct device *sub, struct device *dev);
Ming Leidfe32122012-08-17 22:06:59 +0800679extern void dpm_for_each_dev(void *data, void (*fn)(struct device *, void *));
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200680
681extern int pm_generic_prepare(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100682extern int pm_generic_suspend_late(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200683extern int pm_generic_suspend_noirq(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200684extern int pm_generic_suspend(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100685extern int pm_generic_resume_early(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200686extern int pm_generic_resume_noirq(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200687extern int pm_generic_resume(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200688extern int pm_generic_freeze_noirq(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100689extern int pm_generic_freeze_late(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200690extern int pm_generic_freeze(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200691extern int pm_generic_thaw_noirq(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100692extern int pm_generic_thaw_early(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200693extern int pm_generic_thaw(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200694extern int pm_generic_restore_noirq(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100695extern int pm_generic_restore_early(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200696extern int pm_generic_restore(struct device *dev);
Rafael J. Wysockie5291922011-07-01 22:12:59 +0200697extern int pm_generic_poweroff_noirq(struct device *dev);
Rafael J. Wysockie470d062012-01-29 20:38:41 +0100698extern int pm_generic_poweroff_late(struct device *dev);
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200699extern int pm_generic_poweroff(struct device *dev);
700extern void pm_generic_complete(struct device *dev);
701
Alan Sternd288e472008-03-19 22:37:42 +0100702#else /* !CONFIG_PM_SLEEP */
703
Cornelia Huckffa6a702009-03-04 12:44:00 +0100704#define device_pm_lock() do {} while (0)
705#define device_pm_unlock() do {} while (0)
706
Alan Sternd1616302009-05-24 22:05:42 +0200707static inline int dpm_suspend_start(pm_message_t state)
Alan Sternd288e472008-03-19 22:37:42 +0100708{
709 return 0;
710}
711
Alan Stern9a3df1f2008-03-19 22:39:13 +0100712#define suspend_report_result(fn, ret) do {} while (0)
Alan Sternd288e472008-03-19 22:37:42 +0100713
Rafael J. Wysocki098dff72010-09-22 22:10:57 +0200714static inline int device_pm_wait_for_dev(struct device *a, struct device *b)
715{
716 return 0;
717}
Rafael J. Wysocki6538df82011-05-17 23:26:21 +0200718
Ming Leidfe32122012-08-17 22:06:59 +0800719static inline void dpm_for_each_dev(void *data, void (*fn)(struct device *, void *))
720{
721}
722
Ulf Hansson0a9efc42014-02-19 13:09:21 +0100723#define pm_generic_prepare NULL
724#define pm_generic_suspend_late NULL
725#define pm_generic_suspend_noirq NULL
726#define pm_generic_suspend NULL
727#define pm_generic_resume_early NULL
728#define pm_generic_resume_noirq NULL
729#define pm_generic_resume NULL
730#define pm_generic_freeze_noirq NULL
731#define pm_generic_freeze_late NULL
732#define pm_generic_freeze NULL
733#define pm_generic_thaw_noirq NULL
734#define pm_generic_thaw_early NULL
735#define pm_generic_thaw NULL
736#define pm_generic_restore_noirq NULL
737#define pm_generic_restore_early NULL
738#define pm_generic_restore NULL
739#define pm_generic_poweroff_noirq NULL
740#define pm_generic_poweroff_late NULL
741#define pm_generic_poweroff NULL
742#define pm_generic_complete NULL
Alan Sternd288e472008-03-19 22:37:42 +0100743#endif /* !CONFIG_PM_SLEEP */
744
Cornelia Huckffa6a702009-03-04 12:44:00 +0100745/* How to reorder dpm_list after device_move() */
746enum dpm_order {
747 DPM_ORDER_NONE,
748 DPM_ORDER_DEV_AFTER_PARENT,
749 DPM_ORDER_PARENT_BEFORE_DEV,
750 DPM_ORDER_DEV_LAST,
751};
752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753#endif /* _LINUX_PM_H */