Commit | Line | Data |
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f721889f RW |
1 | /* |
2 | * drivers/base/power/domain.c - Common code related to device power domains. | |
3 | * | |
4 | * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. | |
5 | * | |
6 | * This file is released under the GPLv2. | |
7 | */ | |
8 | ||
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/pm_runtime.h> | |
13 | #include <linux/pm_domain.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/err.h> | |
17b75eca RW |
16 | #include <linux/sched.h> |
17 | #include <linux/suspend.h> | |
f721889f | 18 | |
5248051b RW |
19 | #ifdef CONFIG_PM |
20 | ||
21 | static struct generic_pm_domain *dev_to_genpd(struct device *dev) | |
22 | { | |
23 | if (IS_ERR_OR_NULL(dev->pm_domain)) | |
24 | return ERR_PTR(-EINVAL); | |
25 | ||
596ba34b | 26 | return pd_to_genpd(dev->pm_domain); |
5248051b | 27 | } |
f721889f RW |
28 | |
29 | static void genpd_sd_counter_dec(struct generic_pm_domain *genpd) | |
30 | { | |
31 | if (!WARN_ON(genpd->sd_count == 0)) | |
32 | genpd->sd_count--; | |
33 | } | |
34 | ||
17b75eca RW |
35 | static void genpd_acquire_lock(struct generic_pm_domain *genpd) |
36 | { | |
37 | DEFINE_WAIT(wait); | |
38 | ||
39 | mutex_lock(&genpd->lock); | |
40 | /* | |
41 | * Wait for the domain to transition into either the active, | |
42 | * or the power off state. | |
43 | */ | |
44 | for (;;) { | |
45 | prepare_to_wait(&genpd->status_wait_queue, &wait, | |
46 | TASK_UNINTERRUPTIBLE); | |
c6d22b37 RW |
47 | if (genpd->status == GPD_STATE_ACTIVE |
48 | || genpd->status == GPD_STATE_POWER_OFF) | |
17b75eca RW |
49 | break; |
50 | mutex_unlock(&genpd->lock); | |
51 | ||
52 | schedule(); | |
53 | ||
54 | mutex_lock(&genpd->lock); | |
55 | } | |
56 | finish_wait(&genpd->status_wait_queue, &wait); | |
57 | } | |
58 | ||
59 | static void genpd_release_lock(struct generic_pm_domain *genpd) | |
60 | { | |
61 | mutex_unlock(&genpd->lock); | |
62 | } | |
63 | ||
c6d22b37 RW |
64 | static void genpd_set_active(struct generic_pm_domain *genpd) |
65 | { | |
66 | if (genpd->resume_count == 0) | |
67 | genpd->status = GPD_STATE_ACTIVE; | |
68 | } | |
69 | ||
5248051b RW |
70 | /** |
71 | * pm_genpd_poweron - Restore power to a given PM domain and its parents. | |
72 | * @genpd: PM domain to power up. | |
73 | * | |
74 | * Restore power to @genpd and all of its parents so that it is possible to | |
75 | * resume a device belonging to it. | |
76 | */ | |
18b4f3f5 | 77 | int pm_genpd_poweron(struct generic_pm_domain *genpd) |
5248051b | 78 | { |
17b75eca RW |
79 | struct generic_pm_domain *parent = genpd->parent; |
80 | DEFINE_WAIT(wait); | |
5248051b RW |
81 | int ret = 0; |
82 | ||
83 | start: | |
17b75eca | 84 | if (parent) { |
c6d22b37 | 85 | genpd_acquire_lock(parent); |
17b75eca RW |
86 | mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); |
87 | } else { | |
88 | mutex_lock(&genpd->lock); | |
89 | } | |
17b75eca RW |
90 | |
91 | if (genpd->status == GPD_STATE_ACTIVE | |
596ba34b | 92 | || (genpd->prepared_count > 0 && genpd->suspend_power_off)) |
5248051b RW |
93 | goto out; |
94 | ||
c6d22b37 RW |
95 | if (genpd->status != GPD_STATE_POWER_OFF) { |
96 | genpd_set_active(genpd); | |
97 | goto out; | |
98 | } | |
99 | ||
17b75eca | 100 | if (parent && parent->status != GPD_STATE_ACTIVE) { |
5248051b | 101 | mutex_unlock(&genpd->lock); |
c6d22b37 | 102 | genpd_release_lock(parent); |
5248051b | 103 | |
17b75eca | 104 | ret = pm_genpd_poweron(parent); |
5248051b RW |
105 | if (ret) |
106 | return ret; | |
107 | ||
108 | goto start; | |
109 | } | |
110 | ||
111 | if (genpd->power_on) { | |
112 | int ret = genpd->power_on(genpd); | |
113 | if (ret) | |
114 | goto out; | |
115 | } | |
116 | ||
c6d22b37 | 117 | genpd_set_active(genpd); |
17b75eca RW |
118 | if (parent) |
119 | parent->sd_count++; | |
5248051b RW |
120 | |
121 | out: | |
122 | mutex_unlock(&genpd->lock); | |
17b75eca | 123 | if (parent) |
c6d22b37 | 124 | genpd_release_lock(parent); |
5248051b RW |
125 | |
126 | return ret; | |
127 | } | |
128 | ||
129 | #endif /* CONFIG_PM */ | |
130 | ||
131 | #ifdef CONFIG_PM_RUNTIME | |
132 | ||
f721889f RW |
133 | /** |
134 | * __pm_genpd_save_device - Save the pre-suspend state of a device. | |
135 | * @dle: Device list entry of the device to save the state of. | |
136 | * @genpd: PM domain the device belongs to. | |
137 | */ | |
138 | static int __pm_genpd_save_device(struct dev_list_entry *dle, | |
139 | struct generic_pm_domain *genpd) | |
17b75eca | 140 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f RW |
141 | { |
142 | struct device *dev = dle->dev; | |
143 | struct device_driver *drv = dev->driver; | |
144 | int ret = 0; | |
145 | ||
146 | if (dle->need_restore) | |
147 | return 0; | |
148 | ||
17b75eca RW |
149 | mutex_unlock(&genpd->lock); |
150 | ||
f721889f RW |
151 | if (drv && drv->pm && drv->pm->runtime_suspend) { |
152 | if (genpd->start_device) | |
153 | genpd->start_device(dev); | |
154 | ||
155 | ret = drv->pm->runtime_suspend(dev); | |
156 | ||
157 | if (genpd->stop_device) | |
158 | genpd->stop_device(dev); | |
159 | } | |
160 | ||
17b75eca RW |
161 | mutex_lock(&genpd->lock); |
162 | ||
f721889f RW |
163 | if (!ret) |
164 | dle->need_restore = true; | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | /** | |
170 | * __pm_genpd_restore_device - Restore the pre-suspend state of a device. | |
171 | * @dle: Device list entry of the device to restore the state of. | |
172 | * @genpd: PM domain the device belongs to. | |
173 | */ | |
174 | static void __pm_genpd_restore_device(struct dev_list_entry *dle, | |
175 | struct generic_pm_domain *genpd) | |
17b75eca | 176 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f RW |
177 | { |
178 | struct device *dev = dle->dev; | |
179 | struct device_driver *drv = dev->driver; | |
180 | ||
181 | if (!dle->need_restore) | |
182 | return; | |
183 | ||
17b75eca RW |
184 | mutex_unlock(&genpd->lock); |
185 | ||
f721889f RW |
186 | if (drv && drv->pm && drv->pm->runtime_resume) { |
187 | if (genpd->start_device) | |
188 | genpd->start_device(dev); | |
189 | ||
190 | drv->pm->runtime_resume(dev); | |
191 | ||
192 | if (genpd->stop_device) | |
193 | genpd->stop_device(dev); | |
194 | } | |
195 | ||
17b75eca RW |
196 | mutex_lock(&genpd->lock); |
197 | ||
f721889f RW |
198 | dle->need_restore = false; |
199 | } | |
200 | ||
c6d22b37 RW |
201 | /** |
202 | * genpd_abort_poweroff - Check if a PM domain power off should be aborted. | |
203 | * @genpd: PM domain to check. | |
204 | * | |
205 | * Return true if a PM domain's status changed to GPD_STATE_ACTIVE during | |
206 | * a "power off" operation, which means that a "power on" has occured in the | |
207 | * meantime, or if its resume_count field is different from zero, which means | |
208 | * that one of its devices has been resumed in the meantime. | |
209 | */ | |
210 | static bool genpd_abort_poweroff(struct generic_pm_domain *genpd) | |
211 | { | |
212 | return genpd->status == GPD_STATE_ACTIVE || genpd->resume_count > 0; | |
213 | } | |
214 | ||
f721889f RW |
215 | /** |
216 | * pm_genpd_poweroff - Remove power from a given PM domain. | |
217 | * @genpd: PM domain to power down. | |
218 | * | |
219 | * If all of the @genpd's devices have been suspended and all of its subdomains | |
220 | * have been powered down, run the runtime suspend callbacks provided by all of | |
221 | * the @genpd's devices' drivers and remove power from @genpd. | |
222 | */ | |
223 | static int pm_genpd_poweroff(struct generic_pm_domain *genpd) | |
17b75eca | 224 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f RW |
225 | { |
226 | struct generic_pm_domain *parent; | |
227 | struct dev_list_entry *dle; | |
228 | unsigned int not_suspended; | |
c6d22b37 | 229 | int ret = 0; |
f721889f | 230 | |
c6d22b37 RW |
231 | start: |
232 | /* | |
233 | * Do not try to power off the domain in the following situations: | |
234 | * (1) The domain is already in the "power off" state. | |
235 | * (2) System suspend is in progress. | |
236 | * (3) One of the domain's devices is being resumed right now. | |
237 | */ | |
238 | if (genpd->status == GPD_STATE_POWER_OFF || genpd->prepared_count > 0 | |
239 | || genpd->resume_count > 0) | |
f721889f RW |
240 | return 0; |
241 | ||
242 | if (genpd->sd_count > 0) | |
243 | return -EBUSY; | |
244 | ||
245 | not_suspended = 0; | |
246 | list_for_each_entry(dle, &genpd->dev_list, node) | |
247 | if (dle->dev->driver && !pm_runtime_suspended(dle->dev)) | |
248 | not_suspended++; | |
249 | ||
250 | if (not_suspended > genpd->in_progress) | |
251 | return -EBUSY; | |
252 | ||
c6d22b37 RW |
253 | if (genpd->poweroff_task) { |
254 | /* | |
255 | * Another instance of pm_genpd_poweroff() is executing | |
256 | * callbacks, so tell it to start over and return. | |
257 | */ | |
258 | genpd->status = GPD_STATE_REPEAT; | |
259 | return 0; | |
260 | } | |
261 | ||
f721889f RW |
262 | if (genpd->gov && genpd->gov->power_down_ok) { |
263 | if (!genpd->gov->power_down_ok(&genpd->domain)) | |
264 | return -EAGAIN; | |
265 | } | |
266 | ||
17b75eca | 267 | genpd->status = GPD_STATE_BUSY; |
c6d22b37 | 268 | genpd->poweroff_task = current; |
17b75eca | 269 | |
f721889f RW |
270 | list_for_each_entry_reverse(dle, &genpd->dev_list, node) { |
271 | ret = __pm_genpd_save_device(dle, genpd); | |
697a7f37 RW |
272 | if (ret) { |
273 | genpd_set_active(genpd); | |
274 | goto out; | |
275 | } | |
f721889f | 276 | |
c6d22b37 RW |
277 | if (genpd_abort_poweroff(genpd)) |
278 | goto out; | |
279 | ||
280 | if (genpd->status == GPD_STATE_REPEAT) { | |
281 | genpd->poweroff_task = NULL; | |
282 | goto start; | |
283 | } | |
284 | } | |
17b75eca RW |
285 | |
286 | parent = genpd->parent; | |
287 | if (parent) { | |
c6d22b37 RW |
288 | mutex_unlock(&genpd->lock); |
289 | ||
17b75eca RW |
290 | genpd_acquire_lock(parent); |
291 | mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); | |
c6d22b37 RW |
292 | |
293 | if (genpd_abort_poweroff(genpd)) { | |
294 | genpd_release_lock(parent); | |
295 | goto out; | |
296 | } | |
17b75eca RW |
297 | } |
298 | ||
f721889f RW |
299 | if (genpd->power_off) |
300 | genpd->power_off(genpd); | |
301 | ||
17b75eca | 302 | genpd->status = GPD_STATE_POWER_OFF; |
f721889f | 303 | |
f721889f RW |
304 | if (parent) { |
305 | genpd_sd_counter_dec(parent); | |
306 | if (parent->sd_count == 0) | |
307 | queue_work(pm_wq, &parent->power_off_work); | |
17b75eca RW |
308 | |
309 | genpd_release_lock(parent); | |
f721889f RW |
310 | } |
311 | ||
c6d22b37 RW |
312 | out: |
313 | genpd->poweroff_task = NULL; | |
314 | wake_up_all(&genpd->status_wait_queue); | |
315 | return ret; | |
f721889f RW |
316 | } |
317 | ||
318 | /** | |
319 | * genpd_power_off_work_fn - Power off PM domain whose subdomain count is 0. | |
320 | * @work: Work structure used for scheduling the execution of this function. | |
321 | */ | |
322 | static void genpd_power_off_work_fn(struct work_struct *work) | |
323 | { | |
324 | struct generic_pm_domain *genpd; | |
325 | ||
326 | genpd = container_of(work, struct generic_pm_domain, power_off_work); | |
327 | ||
17b75eca | 328 | genpd_acquire_lock(genpd); |
f721889f | 329 | pm_genpd_poweroff(genpd); |
17b75eca | 330 | genpd_release_lock(genpd); |
f721889f RW |
331 | } |
332 | ||
333 | /** | |
334 | * pm_genpd_runtime_suspend - Suspend a device belonging to I/O PM domain. | |
335 | * @dev: Device to suspend. | |
336 | * | |
337 | * Carry out a runtime suspend of a device under the assumption that its | |
338 | * pm_domain field points to the domain member of an object of type | |
339 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
340 | */ | |
341 | static int pm_genpd_runtime_suspend(struct device *dev) | |
342 | { | |
343 | struct generic_pm_domain *genpd; | |
344 | ||
345 | dev_dbg(dev, "%s()\n", __func__); | |
346 | ||
5248051b RW |
347 | genpd = dev_to_genpd(dev); |
348 | if (IS_ERR(genpd)) | |
f721889f RW |
349 | return -EINVAL; |
350 | ||
f721889f RW |
351 | if (genpd->stop_device) { |
352 | int ret = genpd->stop_device(dev); | |
353 | if (ret) | |
17b75eca | 354 | return ret; |
f721889f | 355 | } |
17b75eca | 356 | |
c6d22b37 | 357 | mutex_lock(&genpd->lock); |
f721889f RW |
358 | genpd->in_progress++; |
359 | pm_genpd_poweroff(genpd); | |
360 | genpd->in_progress--; | |
c6d22b37 | 361 | mutex_unlock(&genpd->lock); |
f721889f RW |
362 | |
363 | return 0; | |
364 | } | |
365 | ||
596ba34b RW |
366 | /** |
367 | * __pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain. | |
368 | * @dev: Device to resume. | |
369 | * @genpd: PM domain the device belongs to. | |
370 | */ | |
371 | static void __pm_genpd_runtime_resume(struct device *dev, | |
372 | struct generic_pm_domain *genpd) | |
373 | { | |
374 | struct dev_list_entry *dle; | |
375 | ||
376 | list_for_each_entry(dle, &genpd->dev_list, node) { | |
377 | if (dle->dev == dev) { | |
378 | __pm_genpd_restore_device(dle, genpd); | |
379 | break; | |
380 | } | |
381 | } | |
596ba34b RW |
382 | } |
383 | ||
f721889f RW |
384 | /** |
385 | * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain. | |
386 | * @dev: Device to resume. | |
387 | * | |
388 | * Carry out a runtime resume of a device under the assumption that its | |
389 | * pm_domain field points to the domain member of an object of type | |
390 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
391 | */ | |
392 | static int pm_genpd_runtime_resume(struct device *dev) | |
393 | { | |
394 | struct generic_pm_domain *genpd; | |
c6d22b37 | 395 | DEFINE_WAIT(wait); |
f721889f RW |
396 | int ret; |
397 | ||
398 | dev_dbg(dev, "%s()\n", __func__); | |
399 | ||
5248051b RW |
400 | genpd = dev_to_genpd(dev); |
401 | if (IS_ERR(genpd)) | |
f721889f RW |
402 | return -EINVAL; |
403 | ||
f721889f RW |
404 | ret = pm_genpd_poweron(genpd); |
405 | if (ret) | |
406 | return ret; | |
407 | ||
c6d22b37 | 408 | mutex_lock(&genpd->lock); |
17b75eca | 409 | genpd->status = GPD_STATE_BUSY; |
c6d22b37 RW |
410 | genpd->resume_count++; |
411 | for (;;) { | |
412 | prepare_to_wait(&genpd->status_wait_queue, &wait, | |
413 | TASK_UNINTERRUPTIBLE); | |
414 | /* | |
415 | * If current is the powering off task, we have been called | |
416 | * reentrantly from one of the device callbacks, so we should | |
417 | * not wait. | |
418 | */ | |
419 | if (!genpd->poweroff_task || genpd->poweroff_task == current) | |
420 | break; | |
421 | mutex_unlock(&genpd->lock); | |
422 | ||
423 | schedule(); | |
424 | ||
425 | mutex_lock(&genpd->lock); | |
426 | } | |
427 | finish_wait(&genpd->status_wait_queue, &wait); | |
596ba34b | 428 | __pm_genpd_runtime_resume(dev, genpd); |
c6d22b37 RW |
429 | genpd->resume_count--; |
430 | genpd_set_active(genpd); | |
17b75eca | 431 | wake_up_all(&genpd->status_wait_queue); |
c6d22b37 | 432 | mutex_unlock(&genpd->lock); |
17b75eca RW |
433 | |
434 | if (genpd->start_device) | |
435 | genpd->start_device(dev); | |
f721889f RW |
436 | |
437 | return 0; | |
438 | } | |
439 | ||
440 | #else | |
441 | ||
442 | static inline void genpd_power_off_work_fn(struct work_struct *work) {} | |
596ba34b RW |
443 | static inline void __pm_genpd_runtime_resume(struct device *dev, |
444 | struct generic_pm_domain *genpd) {} | |
f721889f RW |
445 | |
446 | #define pm_genpd_runtime_suspend NULL | |
447 | #define pm_genpd_runtime_resume NULL | |
448 | ||
449 | #endif /* CONFIG_PM_RUNTIME */ | |
450 | ||
596ba34b RW |
451 | #ifdef CONFIG_PM_SLEEP |
452 | ||
453 | /** | |
454 | * pm_genpd_sync_poweroff - Synchronously power off a PM domain and its parents. | |
455 | * @genpd: PM domain to power off, if possible. | |
456 | * | |
457 | * Check if the given PM domain can be powered off (during system suspend or | |
458 | * hibernation) and do that if so. Also, in that case propagate to its parent. | |
459 | * | |
460 | * This function is only called in "noirq" stages of system power transitions, | |
461 | * so it need not acquire locks (all of the "noirq" callbacks are executed | |
462 | * sequentially, so it is guaranteed that it will never run twice in parallel). | |
463 | */ | |
464 | static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) | |
465 | { | |
466 | struct generic_pm_domain *parent = genpd->parent; | |
467 | ||
17b75eca | 468 | if (genpd->status == GPD_STATE_POWER_OFF) |
596ba34b RW |
469 | return; |
470 | ||
471 | if (genpd->suspended_count != genpd->device_count || genpd->sd_count > 0) | |
472 | return; | |
473 | ||
474 | if (genpd->power_off) | |
475 | genpd->power_off(genpd); | |
476 | ||
17b75eca | 477 | genpd->status = GPD_STATE_POWER_OFF; |
596ba34b RW |
478 | if (parent) { |
479 | genpd_sd_counter_dec(parent); | |
480 | pm_genpd_sync_poweroff(parent); | |
481 | } | |
482 | } | |
483 | ||
484 | /** | |
485 | * pm_genpd_prepare - Start power transition of a device in a PM domain. | |
486 | * @dev: Device to start the transition of. | |
487 | * | |
488 | * Start a power transition of a device (during a system-wide power transition) | |
489 | * under the assumption that its pm_domain field points to the domain member of | |
490 | * an object of type struct generic_pm_domain representing a PM domain | |
491 | * consisting of I/O devices. | |
492 | */ | |
493 | static int pm_genpd_prepare(struct device *dev) | |
494 | { | |
495 | struct generic_pm_domain *genpd; | |
b6c10c84 | 496 | int ret; |
596ba34b RW |
497 | |
498 | dev_dbg(dev, "%s()\n", __func__); | |
499 | ||
500 | genpd = dev_to_genpd(dev); | |
501 | if (IS_ERR(genpd)) | |
502 | return -EINVAL; | |
503 | ||
17b75eca RW |
504 | /* |
505 | * If a wakeup request is pending for the device, it should be woken up | |
506 | * at this point and a system wakeup event should be reported if it's | |
507 | * set up to wake up the system from sleep states. | |
508 | */ | |
509 | pm_runtime_get_noresume(dev); | |
510 | if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) | |
511 | pm_wakeup_event(dev, 0); | |
512 | ||
513 | if (pm_wakeup_pending()) { | |
514 | pm_runtime_put_sync(dev); | |
515 | return -EBUSY; | |
516 | } | |
517 | ||
518 | genpd_acquire_lock(genpd); | |
596ba34b RW |
519 | |
520 | if (genpd->prepared_count++ == 0) | |
17b75eca RW |
521 | genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF; |
522 | ||
523 | genpd_release_lock(genpd); | |
596ba34b RW |
524 | |
525 | if (genpd->suspend_power_off) { | |
17b75eca | 526 | pm_runtime_put_noidle(dev); |
596ba34b RW |
527 | return 0; |
528 | } | |
529 | ||
530 | /* | |
17b75eca RW |
531 | * The PM domain must be in the GPD_STATE_ACTIVE state at this point, |
532 | * so pm_genpd_poweron() will return immediately, but if the device | |
533 | * is suspended (e.g. it's been stopped by .stop_device()), we need | |
534 | * to make it operational. | |
596ba34b | 535 | */ |
17b75eca | 536 | pm_runtime_resume(dev); |
596ba34b RW |
537 | __pm_runtime_disable(dev, false); |
538 | ||
b6c10c84 RW |
539 | ret = pm_generic_prepare(dev); |
540 | if (ret) { | |
541 | mutex_lock(&genpd->lock); | |
542 | ||
543 | if (--genpd->prepared_count == 0) | |
544 | genpd->suspend_power_off = false; | |
545 | ||
546 | mutex_unlock(&genpd->lock); | |
17b75eca | 547 | pm_runtime_enable(dev); |
b6c10c84 | 548 | } |
17b75eca RW |
549 | |
550 | pm_runtime_put_sync(dev); | |
b6c10c84 | 551 | return ret; |
596ba34b RW |
552 | } |
553 | ||
554 | /** | |
555 | * pm_genpd_suspend - Suspend a device belonging to an I/O PM domain. | |
556 | * @dev: Device to suspend. | |
557 | * | |
558 | * Suspend a device under the assumption that its pm_domain field points to the | |
559 | * domain member of an object of type struct generic_pm_domain representing | |
560 | * a PM domain consisting of I/O devices. | |
561 | */ | |
562 | static int pm_genpd_suspend(struct device *dev) | |
563 | { | |
564 | struct generic_pm_domain *genpd; | |
565 | ||
566 | dev_dbg(dev, "%s()\n", __func__); | |
567 | ||
568 | genpd = dev_to_genpd(dev); | |
569 | if (IS_ERR(genpd)) | |
570 | return -EINVAL; | |
571 | ||
572 | return genpd->suspend_power_off ? 0 : pm_generic_suspend(dev); | |
573 | } | |
574 | ||
575 | /** | |
576 | * pm_genpd_suspend_noirq - Late suspend of a device from an I/O PM domain. | |
577 | * @dev: Device to suspend. | |
578 | * | |
579 | * Carry out a late suspend of a device under the assumption that its | |
580 | * pm_domain field points to the domain member of an object of type | |
581 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
582 | */ | |
583 | static int pm_genpd_suspend_noirq(struct device *dev) | |
584 | { | |
585 | struct generic_pm_domain *genpd; | |
586 | int ret; | |
587 | ||
588 | dev_dbg(dev, "%s()\n", __func__); | |
589 | ||
590 | genpd = dev_to_genpd(dev); | |
591 | if (IS_ERR(genpd)) | |
592 | return -EINVAL; | |
593 | ||
594 | if (genpd->suspend_power_off) | |
595 | return 0; | |
596 | ||
597 | ret = pm_generic_suspend_noirq(dev); | |
598 | if (ret) | |
599 | return ret; | |
600 | ||
d4f2d87a RW |
601 | if (device_may_wakeup(dev) |
602 | && genpd->active_wakeup && genpd->active_wakeup(dev)) | |
603 | return 0; | |
604 | ||
596ba34b RW |
605 | if (genpd->stop_device) |
606 | genpd->stop_device(dev); | |
607 | ||
608 | /* | |
609 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
610 | * guaranteed that this function will never run twice in parallel for | |
611 | * the same PM domain, so it is not necessary to use locking here. | |
612 | */ | |
613 | genpd->suspended_count++; | |
614 | pm_genpd_sync_poweroff(genpd); | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | /** | |
620 | * pm_genpd_resume_noirq - Early resume of a device from an I/O power domain. | |
621 | * @dev: Device to resume. | |
622 | * | |
623 | * Carry out an early resume of a device under the assumption that its | |
624 | * pm_domain field points to the domain member of an object of type | |
625 | * struct generic_pm_domain representing a power domain consisting of I/O | |
626 | * devices. | |
627 | */ | |
628 | static int pm_genpd_resume_noirq(struct device *dev) | |
629 | { | |
630 | struct generic_pm_domain *genpd; | |
631 | ||
632 | dev_dbg(dev, "%s()\n", __func__); | |
633 | ||
634 | genpd = dev_to_genpd(dev); | |
635 | if (IS_ERR(genpd)) | |
636 | return -EINVAL; | |
637 | ||
638 | if (genpd->suspend_power_off) | |
639 | return 0; | |
640 | ||
641 | /* | |
642 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
643 | * guaranteed that this function will never run twice in parallel for | |
644 | * the same PM domain, so it is not necessary to use locking here. | |
645 | */ | |
646 | pm_genpd_poweron(genpd); | |
647 | genpd->suspended_count--; | |
648 | if (genpd->start_device) | |
649 | genpd->start_device(dev); | |
650 | ||
651 | return pm_generic_resume_noirq(dev); | |
652 | } | |
653 | ||
654 | /** | |
655 | * pm_genpd_resume - Resume a device belonging to an I/O power domain. | |
656 | * @dev: Device to resume. | |
657 | * | |
658 | * Resume a device under the assumption that its pm_domain field points to the | |
659 | * domain member of an object of type struct generic_pm_domain representing | |
660 | * a power domain consisting of I/O devices. | |
661 | */ | |
662 | static int pm_genpd_resume(struct device *dev) | |
663 | { | |
664 | struct generic_pm_domain *genpd; | |
665 | ||
666 | dev_dbg(dev, "%s()\n", __func__); | |
667 | ||
668 | genpd = dev_to_genpd(dev); | |
669 | if (IS_ERR(genpd)) | |
670 | return -EINVAL; | |
671 | ||
672 | return genpd->suspend_power_off ? 0 : pm_generic_resume(dev); | |
673 | } | |
674 | ||
675 | /** | |
676 | * pm_genpd_freeze - Freeze a device belonging to an I/O power domain. | |
677 | * @dev: Device to freeze. | |
678 | * | |
679 | * Freeze a device under the assumption that its pm_domain field points to the | |
680 | * domain member of an object of type struct generic_pm_domain representing | |
681 | * a power domain consisting of I/O devices. | |
682 | */ | |
683 | static int pm_genpd_freeze(struct device *dev) | |
684 | { | |
685 | struct generic_pm_domain *genpd; | |
686 | ||
687 | dev_dbg(dev, "%s()\n", __func__); | |
688 | ||
689 | genpd = dev_to_genpd(dev); | |
690 | if (IS_ERR(genpd)) | |
691 | return -EINVAL; | |
692 | ||
693 | return genpd->suspend_power_off ? 0 : pm_generic_freeze(dev); | |
694 | } | |
695 | ||
696 | /** | |
697 | * pm_genpd_freeze_noirq - Late freeze of a device from an I/O power domain. | |
698 | * @dev: Device to freeze. | |
699 | * | |
700 | * Carry out a late freeze of a device under the assumption that its | |
701 | * pm_domain field points to the domain member of an object of type | |
702 | * struct generic_pm_domain representing a power domain consisting of I/O | |
703 | * devices. | |
704 | */ | |
705 | static int pm_genpd_freeze_noirq(struct device *dev) | |
706 | { | |
707 | struct generic_pm_domain *genpd; | |
708 | int ret; | |
709 | ||
710 | dev_dbg(dev, "%s()\n", __func__); | |
711 | ||
712 | genpd = dev_to_genpd(dev); | |
713 | if (IS_ERR(genpd)) | |
714 | return -EINVAL; | |
715 | ||
716 | if (genpd->suspend_power_off) | |
717 | return 0; | |
718 | ||
719 | ret = pm_generic_freeze_noirq(dev); | |
720 | if (ret) | |
721 | return ret; | |
722 | ||
723 | if (genpd->stop_device) | |
724 | genpd->stop_device(dev); | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | /** | |
730 | * pm_genpd_thaw_noirq - Early thaw of a device from an I/O power domain. | |
731 | * @dev: Device to thaw. | |
732 | * | |
733 | * Carry out an early thaw of a device under the assumption that its | |
734 | * pm_domain field points to the domain member of an object of type | |
735 | * struct generic_pm_domain representing a power domain consisting of I/O | |
736 | * devices. | |
737 | */ | |
738 | static int pm_genpd_thaw_noirq(struct device *dev) | |
739 | { | |
740 | struct generic_pm_domain *genpd; | |
741 | ||
742 | dev_dbg(dev, "%s()\n", __func__); | |
743 | ||
744 | genpd = dev_to_genpd(dev); | |
745 | if (IS_ERR(genpd)) | |
746 | return -EINVAL; | |
747 | ||
748 | if (genpd->suspend_power_off) | |
749 | return 0; | |
750 | ||
751 | if (genpd->start_device) | |
752 | genpd->start_device(dev); | |
753 | ||
754 | return pm_generic_thaw_noirq(dev); | |
755 | } | |
756 | ||
757 | /** | |
758 | * pm_genpd_thaw - Thaw a device belonging to an I/O power domain. | |
759 | * @dev: Device to thaw. | |
760 | * | |
761 | * Thaw a device under the assumption that its pm_domain field points to the | |
762 | * domain member of an object of type struct generic_pm_domain representing | |
763 | * a power domain consisting of I/O devices. | |
764 | */ | |
765 | static int pm_genpd_thaw(struct device *dev) | |
766 | { | |
767 | struct generic_pm_domain *genpd; | |
768 | ||
769 | dev_dbg(dev, "%s()\n", __func__); | |
770 | ||
771 | genpd = dev_to_genpd(dev); | |
772 | if (IS_ERR(genpd)) | |
773 | return -EINVAL; | |
774 | ||
775 | return genpd->suspend_power_off ? 0 : pm_generic_thaw(dev); | |
776 | } | |
777 | ||
778 | /** | |
779 | * pm_genpd_dev_poweroff - Power off a device belonging to an I/O PM domain. | |
780 | * @dev: Device to suspend. | |
781 | * | |
782 | * Power off a device under the assumption that its pm_domain field points to | |
783 | * the domain member of an object of type struct generic_pm_domain representing | |
784 | * a PM domain consisting of I/O devices. | |
785 | */ | |
786 | static int pm_genpd_dev_poweroff(struct device *dev) | |
787 | { | |
788 | struct generic_pm_domain *genpd; | |
789 | ||
790 | dev_dbg(dev, "%s()\n", __func__); | |
791 | ||
792 | genpd = dev_to_genpd(dev); | |
793 | if (IS_ERR(genpd)) | |
794 | return -EINVAL; | |
795 | ||
796 | return genpd->suspend_power_off ? 0 : pm_generic_poweroff(dev); | |
797 | } | |
798 | ||
799 | /** | |
800 | * pm_genpd_dev_poweroff_noirq - Late power off of a device from a PM domain. | |
801 | * @dev: Device to suspend. | |
802 | * | |
803 | * Carry out a late powering off of a device under the assumption that its | |
804 | * pm_domain field points to the domain member of an object of type | |
805 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
806 | */ | |
807 | static int pm_genpd_dev_poweroff_noirq(struct device *dev) | |
808 | { | |
809 | struct generic_pm_domain *genpd; | |
810 | int ret; | |
811 | ||
812 | dev_dbg(dev, "%s()\n", __func__); | |
813 | ||
814 | genpd = dev_to_genpd(dev); | |
815 | if (IS_ERR(genpd)) | |
816 | return -EINVAL; | |
817 | ||
818 | if (genpd->suspend_power_off) | |
819 | return 0; | |
820 | ||
821 | ret = pm_generic_poweroff_noirq(dev); | |
822 | if (ret) | |
823 | return ret; | |
824 | ||
d4f2d87a RW |
825 | if (device_may_wakeup(dev) |
826 | && genpd->active_wakeup && genpd->active_wakeup(dev)) | |
827 | return 0; | |
828 | ||
596ba34b RW |
829 | if (genpd->stop_device) |
830 | genpd->stop_device(dev); | |
831 | ||
832 | /* | |
833 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
834 | * guaranteed that this function will never run twice in parallel for | |
835 | * the same PM domain, so it is not necessary to use locking here. | |
836 | */ | |
837 | genpd->suspended_count++; | |
838 | pm_genpd_sync_poweroff(genpd); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | /** | |
844 | * pm_genpd_restore_noirq - Early restore of a device from an I/O power domain. | |
845 | * @dev: Device to resume. | |
846 | * | |
847 | * Carry out an early restore of a device under the assumption that its | |
848 | * pm_domain field points to the domain member of an object of type | |
849 | * struct generic_pm_domain representing a power domain consisting of I/O | |
850 | * devices. | |
851 | */ | |
852 | static int pm_genpd_restore_noirq(struct device *dev) | |
853 | { | |
854 | struct generic_pm_domain *genpd; | |
855 | ||
856 | dev_dbg(dev, "%s()\n", __func__); | |
857 | ||
858 | genpd = dev_to_genpd(dev); | |
859 | if (IS_ERR(genpd)) | |
860 | return -EINVAL; | |
861 | ||
862 | /* | |
863 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
864 | * guaranteed that this function will never run twice in parallel for | |
865 | * the same PM domain, so it is not necessary to use locking here. | |
866 | */ | |
17b75eca | 867 | genpd->status = GPD_STATE_POWER_OFF; |
596ba34b RW |
868 | if (genpd->suspend_power_off) { |
869 | /* | |
870 | * The boot kernel might put the domain into the power on state, | |
871 | * so make sure it really is powered off. | |
872 | */ | |
873 | if (genpd->power_off) | |
874 | genpd->power_off(genpd); | |
875 | return 0; | |
876 | } | |
877 | ||
878 | pm_genpd_poweron(genpd); | |
879 | genpd->suspended_count--; | |
880 | if (genpd->start_device) | |
881 | genpd->start_device(dev); | |
882 | ||
883 | return pm_generic_restore_noirq(dev); | |
884 | } | |
885 | ||
886 | /** | |
887 | * pm_genpd_restore - Restore a device belonging to an I/O power domain. | |
888 | * @dev: Device to resume. | |
889 | * | |
890 | * Restore a device under the assumption that its pm_domain field points to the | |
891 | * domain member of an object of type struct generic_pm_domain representing | |
892 | * a power domain consisting of I/O devices. | |
893 | */ | |
894 | static int pm_genpd_restore(struct device *dev) | |
895 | { | |
896 | struct generic_pm_domain *genpd; | |
897 | ||
898 | dev_dbg(dev, "%s()\n", __func__); | |
899 | ||
900 | genpd = dev_to_genpd(dev); | |
901 | if (IS_ERR(genpd)) | |
902 | return -EINVAL; | |
903 | ||
904 | return genpd->suspend_power_off ? 0 : pm_generic_restore(dev); | |
905 | } | |
906 | ||
907 | /** | |
908 | * pm_genpd_complete - Complete power transition of a device in a power domain. | |
909 | * @dev: Device to complete the transition of. | |
910 | * | |
911 | * Complete a power transition of a device (during a system-wide power | |
912 | * transition) under the assumption that its pm_domain field points to the | |
913 | * domain member of an object of type struct generic_pm_domain representing | |
914 | * a power domain consisting of I/O devices. | |
915 | */ | |
916 | static void pm_genpd_complete(struct device *dev) | |
917 | { | |
918 | struct generic_pm_domain *genpd; | |
919 | bool run_complete; | |
920 | ||
921 | dev_dbg(dev, "%s()\n", __func__); | |
922 | ||
923 | genpd = dev_to_genpd(dev); | |
924 | if (IS_ERR(genpd)) | |
925 | return; | |
926 | ||
927 | mutex_lock(&genpd->lock); | |
928 | ||
929 | run_complete = !genpd->suspend_power_off; | |
930 | if (--genpd->prepared_count == 0) | |
931 | genpd->suspend_power_off = false; | |
932 | ||
933 | mutex_unlock(&genpd->lock); | |
934 | ||
935 | if (run_complete) { | |
936 | pm_generic_complete(dev); | |
6f00ff78 | 937 | pm_runtime_set_active(dev); |
596ba34b | 938 | pm_runtime_enable(dev); |
6f00ff78 | 939 | pm_runtime_idle(dev); |
596ba34b RW |
940 | } |
941 | } | |
942 | ||
943 | #else | |
944 | ||
945 | #define pm_genpd_prepare NULL | |
946 | #define pm_genpd_suspend NULL | |
947 | #define pm_genpd_suspend_noirq NULL | |
948 | #define pm_genpd_resume_noirq NULL | |
949 | #define pm_genpd_resume NULL | |
950 | #define pm_genpd_freeze NULL | |
951 | #define pm_genpd_freeze_noirq NULL | |
952 | #define pm_genpd_thaw_noirq NULL | |
953 | #define pm_genpd_thaw NULL | |
954 | #define pm_genpd_dev_poweroff_noirq NULL | |
955 | #define pm_genpd_dev_poweroff NULL | |
956 | #define pm_genpd_restore_noirq NULL | |
957 | #define pm_genpd_restore NULL | |
958 | #define pm_genpd_complete NULL | |
959 | ||
960 | #endif /* CONFIG_PM_SLEEP */ | |
961 | ||
f721889f RW |
962 | /** |
963 | * pm_genpd_add_device - Add a device to an I/O PM domain. | |
964 | * @genpd: PM domain to add the device to. | |
965 | * @dev: Device to be added. | |
966 | */ | |
967 | int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) | |
968 | { | |
969 | struct dev_list_entry *dle; | |
970 | int ret = 0; | |
971 | ||
972 | dev_dbg(dev, "%s()\n", __func__); | |
973 | ||
974 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) | |
975 | return -EINVAL; | |
976 | ||
17b75eca | 977 | genpd_acquire_lock(genpd); |
f721889f | 978 | |
17b75eca | 979 | if (genpd->status == GPD_STATE_POWER_OFF) { |
f721889f RW |
980 | ret = -EINVAL; |
981 | goto out; | |
982 | } | |
983 | ||
596ba34b RW |
984 | if (genpd->prepared_count > 0) { |
985 | ret = -EAGAIN; | |
986 | goto out; | |
987 | } | |
988 | ||
f721889f RW |
989 | list_for_each_entry(dle, &genpd->dev_list, node) |
990 | if (dle->dev == dev) { | |
991 | ret = -EINVAL; | |
992 | goto out; | |
993 | } | |
994 | ||
995 | dle = kzalloc(sizeof(*dle), GFP_KERNEL); | |
996 | if (!dle) { | |
997 | ret = -ENOMEM; | |
998 | goto out; | |
999 | } | |
1000 | ||
1001 | dle->dev = dev; | |
1002 | dle->need_restore = false; | |
1003 | list_add_tail(&dle->node, &genpd->dev_list); | |
596ba34b | 1004 | genpd->device_count++; |
f721889f RW |
1005 | |
1006 | spin_lock_irq(&dev->power.lock); | |
1007 | dev->pm_domain = &genpd->domain; | |
1008 | spin_unlock_irq(&dev->power.lock); | |
1009 | ||
1010 | out: | |
17b75eca | 1011 | genpd_release_lock(genpd); |
f721889f RW |
1012 | |
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * pm_genpd_remove_device - Remove a device from an I/O PM domain. | |
1018 | * @genpd: PM domain to remove the device from. | |
1019 | * @dev: Device to be removed. | |
1020 | */ | |
1021 | int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
1022 | struct device *dev) | |
1023 | { | |
1024 | struct dev_list_entry *dle; | |
1025 | int ret = -EINVAL; | |
1026 | ||
1027 | dev_dbg(dev, "%s()\n", __func__); | |
1028 | ||
1029 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) | |
1030 | return -EINVAL; | |
1031 | ||
17b75eca | 1032 | genpd_acquire_lock(genpd); |
f721889f | 1033 | |
596ba34b RW |
1034 | if (genpd->prepared_count > 0) { |
1035 | ret = -EAGAIN; | |
1036 | goto out; | |
1037 | } | |
1038 | ||
f721889f RW |
1039 | list_for_each_entry(dle, &genpd->dev_list, node) { |
1040 | if (dle->dev != dev) | |
1041 | continue; | |
1042 | ||
1043 | spin_lock_irq(&dev->power.lock); | |
1044 | dev->pm_domain = NULL; | |
1045 | spin_unlock_irq(&dev->power.lock); | |
1046 | ||
596ba34b | 1047 | genpd->device_count--; |
f721889f RW |
1048 | list_del(&dle->node); |
1049 | kfree(dle); | |
1050 | ||
1051 | ret = 0; | |
1052 | break; | |
1053 | } | |
1054 | ||
596ba34b | 1055 | out: |
17b75eca | 1056 | genpd_release_lock(genpd); |
f721889f RW |
1057 | |
1058 | return ret; | |
1059 | } | |
1060 | ||
1061 | /** | |
1062 | * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain. | |
1063 | * @genpd: Master PM domain to add the subdomain to. | |
1064 | * @new_subdomain: Subdomain to be added. | |
1065 | */ | |
1066 | int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
1067 | struct generic_pm_domain *new_subdomain) | |
1068 | { | |
1069 | struct generic_pm_domain *subdomain; | |
1070 | int ret = 0; | |
1071 | ||
1072 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(new_subdomain)) | |
1073 | return -EINVAL; | |
1074 | ||
17b75eca RW |
1075 | start: |
1076 | genpd_acquire_lock(genpd); | |
1077 | mutex_lock_nested(&new_subdomain->lock, SINGLE_DEPTH_NESTING); | |
f721889f | 1078 | |
17b75eca RW |
1079 | if (new_subdomain->status != GPD_STATE_POWER_OFF |
1080 | && new_subdomain->status != GPD_STATE_ACTIVE) { | |
1081 | mutex_unlock(&new_subdomain->lock); | |
1082 | genpd_release_lock(genpd); | |
1083 | goto start; | |
1084 | } | |
1085 | ||
1086 | if (genpd->status == GPD_STATE_POWER_OFF | |
1087 | && new_subdomain->status != GPD_STATE_POWER_OFF) { | |
f721889f RW |
1088 | ret = -EINVAL; |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | list_for_each_entry(subdomain, &genpd->sd_list, sd_node) { | |
1093 | if (subdomain == new_subdomain) { | |
1094 | ret = -EINVAL; | |
1095 | goto out; | |
1096 | } | |
1097 | } | |
1098 | ||
f721889f RW |
1099 | list_add_tail(&new_subdomain->sd_node, &genpd->sd_list); |
1100 | new_subdomain->parent = genpd; | |
17b75eca | 1101 | if (subdomain->status != GPD_STATE_POWER_OFF) |
f721889f RW |
1102 | genpd->sd_count++; |
1103 | ||
f721889f | 1104 | out: |
17b75eca RW |
1105 | mutex_unlock(&new_subdomain->lock); |
1106 | genpd_release_lock(genpd); | |
f721889f RW |
1107 | |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | /** | |
1112 | * pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. | |
1113 | * @genpd: Master PM domain to remove the subdomain from. | |
1114 | * @target: Subdomain to be removed. | |
1115 | */ | |
1116 | int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
1117 | struct generic_pm_domain *target) | |
1118 | { | |
1119 | struct generic_pm_domain *subdomain; | |
1120 | int ret = -EINVAL; | |
1121 | ||
1122 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(target)) | |
1123 | return -EINVAL; | |
1124 | ||
17b75eca RW |
1125 | start: |
1126 | genpd_acquire_lock(genpd); | |
f721889f RW |
1127 | |
1128 | list_for_each_entry(subdomain, &genpd->sd_list, sd_node) { | |
1129 | if (subdomain != target) | |
1130 | continue; | |
1131 | ||
1132 | mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING); | |
1133 | ||
17b75eca RW |
1134 | if (subdomain->status != GPD_STATE_POWER_OFF |
1135 | && subdomain->status != GPD_STATE_ACTIVE) { | |
1136 | mutex_unlock(&subdomain->lock); | |
1137 | genpd_release_lock(genpd); | |
1138 | goto start; | |
1139 | } | |
1140 | ||
f721889f RW |
1141 | list_del(&subdomain->sd_node); |
1142 | subdomain->parent = NULL; | |
17b75eca | 1143 | if (subdomain->status != GPD_STATE_POWER_OFF) |
f721889f RW |
1144 | genpd_sd_counter_dec(genpd); |
1145 | ||
1146 | mutex_unlock(&subdomain->lock); | |
1147 | ||
1148 | ret = 0; | |
1149 | break; | |
1150 | } | |
1151 | ||
17b75eca | 1152 | genpd_release_lock(genpd); |
f721889f RW |
1153 | |
1154 | return ret; | |
1155 | } | |
1156 | ||
1157 | /** | |
1158 | * pm_genpd_init - Initialize a generic I/O PM domain object. | |
1159 | * @genpd: PM domain object to initialize. | |
1160 | * @gov: PM domain governor to associate with the domain (may be NULL). | |
1161 | * @is_off: Initial value of the domain's power_is_off field. | |
1162 | */ | |
1163 | void pm_genpd_init(struct generic_pm_domain *genpd, | |
1164 | struct dev_power_governor *gov, bool is_off) | |
1165 | { | |
1166 | if (IS_ERR_OR_NULL(genpd)) | |
1167 | return; | |
1168 | ||
1169 | INIT_LIST_HEAD(&genpd->sd_node); | |
1170 | genpd->parent = NULL; | |
1171 | INIT_LIST_HEAD(&genpd->dev_list); | |
1172 | INIT_LIST_HEAD(&genpd->sd_list); | |
1173 | mutex_init(&genpd->lock); | |
1174 | genpd->gov = gov; | |
1175 | INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); | |
1176 | genpd->in_progress = 0; | |
1177 | genpd->sd_count = 0; | |
17b75eca RW |
1178 | genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE; |
1179 | init_waitqueue_head(&genpd->status_wait_queue); | |
c6d22b37 RW |
1180 | genpd->poweroff_task = NULL; |
1181 | genpd->resume_count = 0; | |
596ba34b RW |
1182 | genpd->device_count = 0; |
1183 | genpd->suspended_count = 0; | |
f721889f RW |
1184 | genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend; |
1185 | genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume; | |
1186 | genpd->domain.ops.runtime_idle = pm_generic_runtime_idle; | |
596ba34b RW |
1187 | genpd->domain.ops.prepare = pm_genpd_prepare; |
1188 | genpd->domain.ops.suspend = pm_genpd_suspend; | |
1189 | genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq; | |
1190 | genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq; | |
1191 | genpd->domain.ops.resume = pm_genpd_resume; | |
1192 | genpd->domain.ops.freeze = pm_genpd_freeze; | |
1193 | genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq; | |
1194 | genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq; | |
1195 | genpd->domain.ops.thaw = pm_genpd_thaw; | |
1196 | genpd->domain.ops.poweroff = pm_genpd_dev_poweroff; | |
1197 | genpd->domain.ops.poweroff_noirq = pm_genpd_dev_poweroff_noirq; | |
1198 | genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; | |
1199 | genpd->domain.ops.restore = pm_genpd_restore; | |
1200 | genpd->domain.ops.complete = pm_genpd_complete; | |
f721889f | 1201 | } |