1/*
  2 * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
  3 *
  4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
  5 *
  6 * This file is released under the GPLv2.
  7 */
  8
  9#include <linux/pm.h>
 10#include <linux/pm_runtime.h>
 11#include <linux/export.h>
 
 12
 13#ifdef CONFIG_PM
 14/**
 15 * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
 16 * @dev: Device to suspend.
 17 *
 18 * If PM operations are defined for the @dev's driver and they include
 19 * ->runtime_suspend(), execute it and return its error code.  Otherwise,
 20 * return 0.
 21 */
 22int pm_generic_runtime_suspend(struct device *dev)
 23{
 24	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 25	int ret;
 26
 27	ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0;
 28
 29	return ret;
 30}
 31EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
 32
 33/**
 34 * pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
 35 * @dev: Device to resume.
 36 *
 37 * If PM operations are defined for the @dev's driver and they include
 38 * ->runtime_resume(), execute it and return its error code.  Otherwise,
 39 * return 0.
 40 */
 41int pm_generic_runtime_resume(struct device *dev)
 42{
 43	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 44	int ret;
 45
 46	ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0;
 47
 48	return ret;
 49}
 50EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
 51#endif /* CONFIG_PM */
 52
 53#ifdef CONFIG_PM_SLEEP
 54/**
 55 * pm_generic_prepare - Generic routine preparing a device for power transition.
 56 * @dev: Device to prepare.
 57 *
 58 * Prepare a device for a system-wide power transition.
 59 */
 60int pm_generic_prepare(struct device *dev)
 61{
 62	struct device_driver *drv = dev->driver;
 63	int ret = 0;
 64
 65	if (drv && drv->pm && drv->pm->prepare)
 66		ret = drv->pm->prepare(dev);
 67
 68	return ret;
 69}
 70
 71/**
 72 * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
 73 * @dev: Device to suspend.
 74 */
 75int pm_generic_suspend_noirq(struct device *dev)
 76{
 77	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 78
 79	return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0;
 80}
 81EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
 82
 83/**
 84 * pm_generic_suspend_late - Generic suspend_late callback for subsystems.
 85 * @dev: Device to suspend.
 86 */
 87int pm_generic_suspend_late(struct device *dev)
 88{
 89	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 90
 91	return pm && pm->suspend_late ? pm->suspend_late(dev) : 0;
 92}
 93EXPORT_SYMBOL_GPL(pm_generic_suspend_late);
 94
 95/**
 96 * pm_generic_suspend - Generic suspend callback for subsystems.
 97 * @dev: Device to suspend.
 98 */
 99int pm_generic_suspend(struct device *dev)
100{
101	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
102
103	return pm && pm->suspend ? pm->suspend(dev) : 0;
104}
105EXPORT_SYMBOL_GPL(pm_generic_suspend);
106
107/**
108 * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
109 * @dev: Device to freeze.
110 */
111int pm_generic_freeze_noirq(struct device *dev)
112{
113	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
114
115	return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0;
116}
117EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
118
119/**
120 * pm_generic_freeze_late - Generic freeze_late callback for subsystems.
121 * @dev: Device to freeze.
122 */
123int pm_generic_freeze_late(struct device *dev)
124{
125	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
126
127	return pm && pm->freeze_late ? pm->freeze_late(dev) : 0;
128}
129EXPORT_SYMBOL_GPL(pm_generic_freeze_late);
130
131/**
132 * pm_generic_freeze - Generic freeze callback for subsystems.
133 * @dev: Device to freeze.
134 */
135int pm_generic_freeze(struct device *dev)
136{
137	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
138
139	return pm && pm->freeze ? pm->freeze(dev) : 0;
140}
141EXPORT_SYMBOL_GPL(pm_generic_freeze);
142
143/**
144 * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
145 * @dev: Device to handle.
146 */
147int pm_generic_poweroff_noirq(struct device *dev)
148{
149	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
150
151	return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0;
152}
153EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
154
155/**
156 * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems.
157 * @dev: Device to handle.
158 */
159int pm_generic_poweroff_late(struct device *dev)
160{
161	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
162
163	return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0;
164}
165EXPORT_SYMBOL_GPL(pm_generic_poweroff_late);
166
167/**
168 * pm_generic_poweroff - Generic poweroff callback for subsystems.
169 * @dev: Device to handle.
170 */
171int pm_generic_poweroff(struct device *dev)
172{
173	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
174
175	return pm && pm->poweroff ? pm->poweroff(dev) : 0;
176}
177EXPORT_SYMBOL_GPL(pm_generic_poweroff);
178
179/**
180 * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
181 * @dev: Device to thaw.
182 */
183int pm_generic_thaw_noirq(struct device *dev)
184{
185	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
186
187	return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0;
188}
189EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
190
191/**
192 * pm_generic_thaw_early - Generic thaw_early callback for subsystems.
193 * @dev: Device to thaw.
194 */
195int pm_generic_thaw_early(struct device *dev)
196{
197	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
198
199	return pm && pm->thaw_early ? pm->thaw_early(dev) : 0;
200}
201EXPORT_SYMBOL_GPL(pm_generic_thaw_early);
202
203/**
204 * pm_generic_thaw - Generic thaw callback for subsystems.
205 * @dev: Device to thaw.
206 */
207int pm_generic_thaw(struct device *dev)
208{
209	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
210
211	return pm && pm->thaw ? pm->thaw(dev) : 0;
212}
213EXPORT_SYMBOL_GPL(pm_generic_thaw);
214
215/**
216 * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
217 * @dev: Device to resume.
218 */
219int pm_generic_resume_noirq(struct device *dev)
220{
221	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
222
223	return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0;
224}
225EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
226
227/**
228 * pm_generic_resume_early - Generic resume_early callback for subsystems.
229 * @dev: Device to resume.
230 */
231int pm_generic_resume_early(struct device *dev)
232{
233	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
234
235	return pm && pm->resume_early ? pm->resume_early(dev) : 0;
236}
237EXPORT_SYMBOL_GPL(pm_generic_resume_early);
238
239/**
240 * pm_generic_resume - Generic resume callback for subsystems.
241 * @dev: Device to resume.
242 */
243int pm_generic_resume(struct device *dev)
244{
245	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
246
247	return pm && pm->resume ? pm->resume(dev) : 0;
248}
249EXPORT_SYMBOL_GPL(pm_generic_resume);
250
251/**
252 * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
253 * @dev: Device to restore.
254 */
255int pm_generic_restore_noirq(struct device *dev)
256{
257	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
258
259	return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0;
260}
261EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
262
263/**
264 * pm_generic_restore_early - Generic restore_early callback for subsystems.
265 * @dev: Device to resume.
266 */
267int pm_generic_restore_early(struct device *dev)
268{
269	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
270
271	return pm && pm->restore_early ? pm->restore_early(dev) : 0;
272}
273EXPORT_SYMBOL_GPL(pm_generic_restore_early);
274
275/**
276 * pm_generic_restore - Generic restore callback for subsystems.
277 * @dev: Device to restore.
278 */
279int pm_generic_restore(struct device *dev)
280{
281	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
282
283	return pm && pm->restore ? pm->restore(dev) : 0;
284}
285EXPORT_SYMBOL_GPL(pm_generic_restore);
286
287/**
288 * pm_generic_complete - Generic routine completing a device power transition.
289 * @dev: Device to handle.
290 *
291 * Complete a device power transition during a system-wide power transition.
292 */
293void pm_generic_complete(struct device *dev)
294{
295	struct device_driver *drv = dev->driver;
296
297	if (drv && drv->pm && drv->pm->complete)
298		drv->pm->complete(dev);
 
299
 
 
 
 
 
 
 
 
 
 
 
 
300	/*
301	 * Let runtime PM try to suspend devices that haven't been in use before
302	 * going into the system-wide sleep state we're resuming from.
 
303	 */
304	pm_request_idle(dev);
 
305}
 
306#endif /* CONFIG_PM_SLEEP */

  1/*
  2 * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
  3 *
  4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
  5 *
  6 * This file is released under the GPLv2.
  7 */
  8
  9#include <linux/pm.h>
 10#include <linux/pm_runtime.h>
 11#include <linux/export.h>
 12#include <linux/suspend.h>
 13
 14#ifdef CONFIG_PM
 15/**
 16 * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
 17 * @dev: Device to suspend.
 18 *
 19 * If PM operations are defined for the @dev's driver and they include
 20 * ->runtime_suspend(), execute it and return its error code.  Otherwise,
 21 * return 0.
 22 */
 23int pm_generic_runtime_suspend(struct device *dev)
 24{
 25	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 26	int ret;
 27
 28	ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0;
 29
 30	return ret;
 31}
 32EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
 33
 34/**
 35 * pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
 36 * @dev: Device to resume.
 37 *
 38 * If PM operations are defined for the @dev's driver and they include
 39 * ->runtime_resume(), execute it and return its error code.  Otherwise,
 40 * return 0.
 41 */
 42int pm_generic_runtime_resume(struct device *dev)
 43{
 44	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 45	int ret;
 46
 47	ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0;
 48
 49	return ret;
 50}
 51EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
 52#endif /* CONFIG_PM */
 53
 54#ifdef CONFIG_PM_SLEEP
 55/**
 56 * pm_generic_prepare - Generic routine preparing a device for power transition.
 57 * @dev: Device to prepare.
 58 *
 59 * Prepare a device for a system-wide power transition.
 60 */
 61int pm_generic_prepare(struct device *dev)
 62{
 63	struct device_driver *drv = dev->driver;
 64	int ret = 0;
 65
 66	if (drv && drv->pm && drv->pm->prepare)
 67		ret = drv->pm->prepare(dev);
 68
 69	return ret;
 70}
 71
 72/**
 73 * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
 74 * @dev: Device to suspend.
 75 */
 76int pm_generic_suspend_noirq(struct device *dev)
 77{
 78	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 79
 80	return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0;
 81}
 82EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
 83
 84/**
 85 * pm_generic_suspend_late - Generic suspend_late callback for subsystems.
 86 * @dev: Device to suspend.
 87 */
 88int pm_generic_suspend_late(struct device *dev)
 89{
 90	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 91
 92	return pm && pm->suspend_late ? pm->suspend_late(dev) : 0;
 93}
 94EXPORT_SYMBOL_GPL(pm_generic_suspend_late);
 95
 96/**
 97 * pm_generic_suspend - Generic suspend callback for subsystems.
 98 * @dev: Device to suspend.
 99 */
100int pm_generic_suspend(struct device *dev)
101{
102	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
103
104	return pm && pm->suspend ? pm->suspend(dev) : 0;
105}
106EXPORT_SYMBOL_GPL(pm_generic_suspend);
107
108/**
109 * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
110 * @dev: Device to freeze.
111 */
112int pm_generic_freeze_noirq(struct device *dev)
113{
114	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
115
116	return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0;
117}
118EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
119
120/**
121 * pm_generic_freeze_late - Generic freeze_late callback for subsystems.
122 * @dev: Device to freeze.
123 */
124int pm_generic_freeze_late(struct device *dev)
125{
126	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
127
128	return pm && pm->freeze_late ? pm->freeze_late(dev) : 0;
129}
130EXPORT_SYMBOL_GPL(pm_generic_freeze_late);
131
132/**
133 * pm_generic_freeze - Generic freeze callback for subsystems.
134 * @dev: Device to freeze.
135 */
136int pm_generic_freeze(struct device *dev)
137{
138	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
139
140	return pm && pm->freeze ? pm->freeze(dev) : 0;
141}
142EXPORT_SYMBOL_GPL(pm_generic_freeze);
143
144/**
145 * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
146 * @dev: Device to handle.
147 */
148int pm_generic_poweroff_noirq(struct device *dev)
149{
150	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
151
152	return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0;
153}
154EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
155
156/**
157 * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems.
158 * @dev: Device to handle.
159 */
160int pm_generic_poweroff_late(struct device *dev)
161{
162	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
163
164	return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0;
165}
166EXPORT_SYMBOL_GPL(pm_generic_poweroff_late);
167
168/**
169 * pm_generic_poweroff - Generic poweroff callback for subsystems.
170 * @dev: Device to handle.
171 */
172int pm_generic_poweroff(struct device *dev)
173{
174	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
175
176	return pm && pm->poweroff ? pm->poweroff(dev) : 0;
177}
178EXPORT_SYMBOL_GPL(pm_generic_poweroff);
179
180/**
181 * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
182 * @dev: Device to thaw.
183 */
184int pm_generic_thaw_noirq(struct device *dev)
185{
186	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
187
188	return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0;
189}
190EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
191
192/**
193 * pm_generic_thaw_early - Generic thaw_early callback for subsystems.
194 * @dev: Device to thaw.
195 */
196int pm_generic_thaw_early(struct device *dev)
197{
198	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
199
200	return pm && pm->thaw_early ? pm->thaw_early(dev) : 0;
201}
202EXPORT_SYMBOL_GPL(pm_generic_thaw_early);
203
204/**
205 * pm_generic_thaw - Generic thaw callback for subsystems.
206 * @dev: Device to thaw.
207 */
208int pm_generic_thaw(struct device *dev)
209{
210	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
211
212	return pm && pm->thaw ? pm->thaw(dev) : 0;
213}
214EXPORT_SYMBOL_GPL(pm_generic_thaw);
215
216/**
217 * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
218 * @dev: Device to resume.
219 */
220int pm_generic_resume_noirq(struct device *dev)
221{
222	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
223
224	return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0;
225}
226EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
227
228/**
229 * pm_generic_resume_early - Generic resume_early callback for subsystems.
230 * @dev: Device to resume.
231 */
232int pm_generic_resume_early(struct device *dev)
233{
234	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
235
236	return pm && pm->resume_early ? pm->resume_early(dev) : 0;
237}
238EXPORT_SYMBOL_GPL(pm_generic_resume_early);
239
240/**
241 * pm_generic_resume - Generic resume callback for subsystems.
242 * @dev: Device to resume.
243 */
244int pm_generic_resume(struct device *dev)
245{
246	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
247
248	return pm && pm->resume ? pm->resume(dev) : 0;
249}
250EXPORT_SYMBOL_GPL(pm_generic_resume);
251
252/**
253 * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
254 * @dev: Device to restore.
255 */
256int pm_generic_restore_noirq(struct device *dev)
257{
258	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
259
260	return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0;
261}
262EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
263
264/**
265 * pm_generic_restore_early - Generic restore_early callback for subsystems.
266 * @dev: Device to resume.
267 */
268int pm_generic_restore_early(struct device *dev)
269{
270	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
271
272	return pm && pm->restore_early ? pm->restore_early(dev) : 0;
273}
274EXPORT_SYMBOL_GPL(pm_generic_restore_early);
275
276/**
277 * pm_generic_restore - Generic restore callback for subsystems.
278 * @dev: Device to restore.
279 */
280int pm_generic_restore(struct device *dev)
281{
282	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
283
284	return pm && pm->restore ? pm->restore(dev) : 0;
285}
286EXPORT_SYMBOL_GPL(pm_generic_restore);
287
288/**
289 * pm_generic_complete - Generic routine completing a device power transition.
290 * @dev: Device to handle.
291 *
292 * Complete a device power transition during a system-wide power transition.
293 */
294void pm_generic_complete(struct device *dev)
295{
296	struct device_driver *drv = dev->driver;
297
298	if (drv && drv->pm && drv->pm->complete)
299		drv->pm->complete(dev);
300}
301
302/**
303 * pm_complete_with_resume_check - Complete a device power transition.
304 * @dev: Device to handle.
305 *
306 * Complete a device power transition during a system-wide power transition and
307 * optionally schedule a runtime resume of the device if the system resume in
308 * progress has been initated by the platform firmware and the device had its
309 * power.direct_complete flag set.
310 */
311void pm_complete_with_resume_check(struct device *dev)
312{
313	pm_generic_complete(dev);
314	/*
315	 * If the device had been runtime-suspended before the system went into
316	 * the sleep state it is going out of and it has never been resumed till
317	 * now, resume it in case the firmware powered it up.
318	 */
319	if (dev->power.direct_complete && pm_resume_via_firmware())
320		pm_request_resume(dev);
321}
322EXPORT_SYMBOL_GPL(pm_complete_with_resume_check);
323#endif /* CONFIG_PM_SLEEP */