2 * drivers/base/power/domain.c - Common code related to device power domains.
4 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
6 * This file is released under the GPLv2.
9 #include <linux/init.h>
10 #include <linux/kernel.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/pm_domain.h>
14 #include <linux/slab.h>
15 #include <linux/err.h>
16 #include <linux/sched.h>
17 #include <linux/suspend.h>
18 #include <linux/export.h>
20 #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \
22 type (*__routine)(struct device *__d); \
23 type __ret = (type)0; \
25 __routine = genpd->dev_ops.callback; \
27 __ret = __routine(dev); \
29 __routine = dev_gpd_data(dev)->ops.callback; \
31 __ret = __routine(dev); \
36 #define GENPD_DEV_TIMED_CALLBACK(genpd, type, callback, dev, field, name) \
38 ktime_t __start = ktime_get(); \
39 type __retval = GENPD_DEV_CALLBACK(genpd, type, callback, dev); \
40 s64 __elapsed = ktime_to_ns(ktime_sub(ktime_get(), __start)); \
41 struct generic_pm_domain_data *__gpd_data = dev_gpd_data(dev); \
42 if (__elapsed > __gpd_data->td.field) { \
43 __gpd_data->td.field = __elapsed; \
44 dev_warn(dev, name " latency exceeded, new value %lld ns\n", \
50 static LIST_HEAD(gpd_list
);
51 static DEFINE_MUTEX(gpd_list_lock
);
55 struct generic_pm_domain
*dev_to_genpd(struct device
*dev
)
57 if (IS_ERR_OR_NULL(dev
->pm_domain
))
58 return ERR_PTR(-EINVAL
);
60 return pd_to_genpd(dev
->pm_domain
);
63 static int genpd_stop_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
65 return GENPD_DEV_TIMED_CALLBACK(genpd
, int, stop
, dev
,
66 stop_latency_ns
, "stop");
69 static int genpd_start_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
71 return GENPD_DEV_TIMED_CALLBACK(genpd
, int, start
, dev
,
72 start_latency_ns
, "start");
75 static int genpd_save_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
77 return GENPD_DEV_TIMED_CALLBACK(genpd
, int, save_state
, dev
,
78 save_state_latency_ns
, "state save");
81 static int genpd_restore_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
83 return GENPD_DEV_TIMED_CALLBACK(genpd
, int, restore_state
, dev
,
84 restore_state_latency_ns
,
88 static bool genpd_sd_counter_dec(struct generic_pm_domain
*genpd
)
92 if (!WARN_ON(atomic_read(&genpd
->sd_count
) == 0))
93 ret
= !!atomic_dec_and_test(&genpd
->sd_count
);
98 static void genpd_sd_counter_inc(struct generic_pm_domain
*genpd
)
100 atomic_inc(&genpd
->sd_count
);
101 smp_mb__after_atomic_inc();
104 static void genpd_acquire_lock(struct generic_pm_domain
*genpd
)
108 mutex_lock(&genpd
->lock
);
110 * Wait for the domain to transition into either the active,
111 * or the power off state.
114 prepare_to_wait(&genpd
->status_wait_queue
, &wait
,
115 TASK_UNINTERRUPTIBLE
);
116 if (genpd
->status
== GPD_STATE_ACTIVE
117 || genpd
->status
== GPD_STATE_POWER_OFF
)
119 mutex_unlock(&genpd
->lock
);
123 mutex_lock(&genpd
->lock
);
125 finish_wait(&genpd
->status_wait_queue
, &wait
);
128 static void genpd_release_lock(struct generic_pm_domain
*genpd
)
130 mutex_unlock(&genpd
->lock
);
133 static void genpd_set_active(struct generic_pm_domain
*genpd
)
135 if (genpd
->resume_count
== 0)
136 genpd
->status
= GPD_STATE_ACTIVE
;
140 * __pm_genpd_poweron - Restore power to a given PM domain and its masters.
141 * @genpd: PM domain to power up.
143 * Restore power to @genpd and all of its masters so that it is possible to
144 * resume a device belonging to it.
146 int __pm_genpd_poweron(struct generic_pm_domain
*genpd
)
147 __releases(&genpd
->lock
) __acquires(&genpd
->lock
)
149 struct gpd_link
*link
;
153 /* If the domain's master is being waited for, we have to wait too. */
155 prepare_to_wait(&genpd
->status_wait_queue
, &wait
,
156 TASK_UNINTERRUPTIBLE
);
157 if (genpd
->status
!= GPD_STATE_WAIT_MASTER
)
159 mutex_unlock(&genpd
->lock
);
163 mutex_lock(&genpd
->lock
);
165 finish_wait(&genpd
->status_wait_queue
, &wait
);
167 if (genpd
->status
== GPD_STATE_ACTIVE
168 || (genpd
->prepared_count
> 0 && genpd
->suspend_power_off
))
171 if (genpd
->status
!= GPD_STATE_POWER_OFF
) {
172 genpd_set_active(genpd
);
177 * The list is guaranteed not to change while the loop below is being
178 * executed, unless one of the masters' .power_on() callbacks fiddles
181 list_for_each_entry(link
, &genpd
->slave_links
, slave_node
) {
182 genpd_sd_counter_inc(link
->master
);
183 genpd
->status
= GPD_STATE_WAIT_MASTER
;
185 mutex_unlock(&genpd
->lock
);
187 ret
= pm_genpd_poweron(link
->master
);
189 mutex_lock(&genpd
->lock
);
192 * The "wait for parent" status is guaranteed not to change
193 * while the master is powering on.
195 genpd
->status
= GPD_STATE_POWER_OFF
;
196 wake_up_all(&genpd
->status_wait_queue
);
198 genpd_sd_counter_dec(link
->master
);
203 if (genpd
->power_on
) {
204 ktime_t time_start
= ktime_get();
207 ret
= genpd
->power_on(genpd
);
211 elapsed_ns
= ktime_to_ns(ktime_sub(ktime_get(), time_start
));
212 if (elapsed_ns
> genpd
->power_on_latency_ns
) {
213 genpd
->power_on_latency_ns
= elapsed_ns
;
215 pr_warning("%s: Power-on latency exceeded, "
216 "new value %lld ns\n", genpd
->name
,
221 genpd_set_active(genpd
);
226 list_for_each_entry_continue_reverse(link
, &genpd
->slave_links
, slave_node
)
227 genpd_sd_counter_dec(link
->master
);
233 * pm_genpd_poweron - Restore power to a given PM domain and its masters.
234 * @genpd: PM domain to power up.
236 int pm_genpd_poweron(struct generic_pm_domain
*genpd
)
240 mutex_lock(&genpd
->lock
);
241 ret
= __pm_genpd_poweron(genpd
);
242 mutex_unlock(&genpd
->lock
);
246 #endif /* CONFIG_PM */
248 #ifdef CONFIG_PM_RUNTIME
251 * __pm_genpd_save_device - Save the pre-suspend state of a device.
252 * @pdd: Domain data of the device to save the state of.
253 * @genpd: PM domain the device belongs to.
255 static int __pm_genpd_save_device(struct pm_domain_data
*pdd
,
256 struct generic_pm_domain
*genpd
)
257 __releases(&genpd
->lock
) __acquires(&genpd
->lock
)
259 struct generic_pm_domain_data
*gpd_data
= to_gpd_data(pdd
);
260 struct device
*dev
= pdd
->dev
;
263 if (gpd_data
->need_restore
)
266 mutex_unlock(&genpd
->lock
);
268 genpd_start_dev(genpd
, dev
);
269 ret
= genpd_save_dev(genpd
, dev
);
270 genpd_stop_dev(genpd
, dev
);
272 mutex_lock(&genpd
->lock
);
275 gpd_data
->need_restore
= true;
281 * __pm_genpd_restore_device - Restore the pre-suspend state of a device.
282 * @pdd: Domain data of the device to restore the state of.
283 * @genpd: PM domain the device belongs to.
285 static void __pm_genpd_restore_device(struct pm_domain_data
*pdd
,
286 struct generic_pm_domain
*genpd
)
287 __releases(&genpd
->lock
) __acquires(&genpd
->lock
)
289 struct generic_pm_domain_data
*gpd_data
= to_gpd_data(pdd
);
290 struct device
*dev
= pdd
->dev
;
292 if (!gpd_data
->need_restore
)
295 mutex_unlock(&genpd
->lock
);
297 genpd_start_dev(genpd
, dev
);
298 genpd_restore_dev(genpd
, dev
);
299 genpd_stop_dev(genpd
, dev
);
301 mutex_lock(&genpd
->lock
);
303 gpd_data
->need_restore
= false;
307 * genpd_abort_poweroff - Check if a PM domain power off should be aborted.
308 * @genpd: PM domain to check.
310 * Return true if a PM domain's status changed to GPD_STATE_ACTIVE during
311 * a "power off" operation, which means that a "power on" has occured in the
312 * meantime, or if its resume_count field is different from zero, which means
313 * that one of its devices has been resumed in the meantime.
315 static bool genpd_abort_poweroff(struct generic_pm_domain
*genpd
)
317 return genpd
->status
== GPD_STATE_WAIT_MASTER
318 || genpd
->status
== GPD_STATE_ACTIVE
|| genpd
->resume_count
> 0;
322 * genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff().
323 * @genpd: PM domait to power off.
325 * Queue up the execution of pm_genpd_poweroff() unless it's already been done
328 void genpd_queue_power_off_work(struct generic_pm_domain
*genpd
)
330 if (!work_pending(&genpd
->power_off_work
))
331 queue_work(pm_wq
, &genpd
->power_off_work
);
335 * pm_genpd_poweroff - Remove power from a given PM domain.
336 * @genpd: PM domain to power down.
338 * If all of the @genpd's devices have been suspended and all of its subdomains
339 * have been powered down, run the runtime suspend callbacks provided by all of
340 * the @genpd's devices' drivers and remove power from @genpd.
342 static int pm_genpd_poweroff(struct generic_pm_domain
*genpd
)
343 __releases(&genpd
->lock
) __acquires(&genpd
->lock
)
345 struct pm_domain_data
*pdd
;
346 struct gpd_link
*link
;
347 unsigned int not_suspended
;
352 * Do not try to power off the domain in the following situations:
353 * (1) The domain is already in the "power off" state.
354 * (2) The domain is waiting for its master to power up.
355 * (3) One of the domain's devices is being resumed right now.
356 * (4) System suspend is in progress.
358 if (genpd
->status
== GPD_STATE_POWER_OFF
359 || genpd
->status
== GPD_STATE_WAIT_MASTER
360 || genpd
->resume_count
> 0 || genpd
->prepared_count
> 0)
363 if (atomic_read(&genpd
->sd_count
) > 0)
367 list_for_each_entry(pdd
, &genpd
->dev_list
, list_node
)
368 if (pdd
->dev
->driver
&& (!pm_runtime_suspended(pdd
->dev
)
369 || pdd
->dev
->power
.irq_safe
))
372 if (not_suspended
> genpd
->in_progress
)
375 if (genpd
->poweroff_task
) {
377 * Another instance of pm_genpd_poweroff() is executing
378 * callbacks, so tell it to start over and return.
380 genpd
->status
= GPD_STATE_REPEAT
;
384 if (genpd
->gov
&& genpd
->gov
->power_down_ok
) {
385 if (!genpd
->gov
->power_down_ok(&genpd
->domain
))
389 genpd
->status
= GPD_STATE_BUSY
;
390 genpd
->poweroff_task
= current
;
392 list_for_each_entry_reverse(pdd
, &genpd
->dev_list
, list_node
) {
393 ret
= atomic_read(&genpd
->sd_count
) == 0 ?
394 __pm_genpd_save_device(pdd
, genpd
) : -EBUSY
;
396 if (genpd_abort_poweroff(genpd
))
400 genpd_set_active(genpd
);
404 if (genpd
->status
== GPD_STATE_REPEAT
) {
405 genpd
->poweroff_task
= NULL
;
410 if (genpd
->power_off
) {
414 if (atomic_read(&genpd
->sd_count
) > 0) {
419 time_start
= ktime_get();
422 * If sd_count > 0 at this point, one of the subdomains hasn't
423 * managed to call pm_genpd_poweron() for the master yet after
424 * incrementing it. In that case pm_genpd_poweron() will wait
425 * for us to drop the lock, so we can call .power_off() and let
426 * the pm_genpd_poweron() restore power for us (this shouldn't
427 * happen very often).
429 ret
= genpd
->power_off(genpd
);
431 genpd_set_active(genpd
);
435 elapsed_ns
= ktime_to_ns(ktime_sub(ktime_get(), time_start
));
436 if (elapsed_ns
> genpd
->power_off_latency_ns
) {
437 genpd
->power_off_latency_ns
= elapsed_ns
;
439 pr_warning("%s: Power-off latency exceeded, "
440 "new value %lld ns\n", genpd
->name
,
445 genpd
->status
= GPD_STATE_POWER_OFF
;
446 genpd
->power_off_time
= ktime_get();
448 /* Update PM QoS information for devices in the domain. */
449 list_for_each_entry_reverse(pdd
, &genpd
->dev_list
, list_node
) {
450 struct gpd_timing_data
*td
= &to_gpd_data(pdd
)->td
;
452 pm_runtime_update_max_time_suspended(pdd
->dev
,
453 td
->start_latency_ns
+
454 td
->restore_state_latency_ns
+
455 genpd
->power_on_latency_ns
);
458 list_for_each_entry(link
, &genpd
->slave_links
, slave_node
) {
459 genpd_sd_counter_dec(link
->master
);
460 genpd_queue_power_off_work(link
->master
);
464 genpd
->poweroff_task
= NULL
;
465 wake_up_all(&genpd
->status_wait_queue
);
470 * genpd_power_off_work_fn - Power off PM domain whose subdomain count is 0.
471 * @work: Work structure used for scheduling the execution of this function.
473 static void genpd_power_off_work_fn(struct work_struct
*work
)
475 struct generic_pm_domain
*genpd
;
477 genpd
= container_of(work
, struct generic_pm_domain
, power_off_work
);
479 genpd_acquire_lock(genpd
);
480 pm_genpd_poweroff(genpd
);
481 genpd_release_lock(genpd
);
485 * pm_genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.
486 * @dev: Device to suspend.
488 * Carry out a runtime suspend of a device under the assumption that its
489 * pm_domain field points to the domain member of an object of type
490 * struct generic_pm_domain representing a PM domain consisting of I/O devices.
492 static int pm_genpd_runtime_suspend(struct device
*dev
)
494 struct generic_pm_domain
*genpd
;
495 bool (*stop_ok
)(struct device
*__dev
);
498 dev_dbg(dev
, "%s()\n", __func__
);
500 genpd
= dev_to_genpd(dev
);
504 might_sleep_if(!genpd
->dev_irq_safe
);
506 stop_ok
= genpd
->gov
? genpd
->gov
->stop_ok
: NULL
;
507 if (stop_ok
&& !stop_ok(dev
))
510 ret
= genpd_stop_dev(genpd
, dev
);
514 pm_runtime_update_max_time_suspended(dev
,
515 dev_gpd_data(dev
)->td
.start_latency_ns
);
518 * If power.irq_safe is set, this routine will be run with interrupts
519 * off, so it can't use mutexes.
521 if (dev
->power
.irq_safe
)
524 mutex_lock(&genpd
->lock
);
525 genpd
->in_progress
++;
526 pm_genpd_poweroff(genpd
);
527 genpd
->in_progress
--;
528 mutex_unlock(&genpd
->lock
);
534 * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain.
535 * @dev: Device to resume.
537 * Carry out a runtime resume of a device under the assumption that its
538 * pm_domain field points to the domain member of an object of type
539 * struct generic_pm_domain representing a PM domain consisting of I/O devices.
541 static int pm_genpd_runtime_resume(struct device
*dev
)
543 struct generic_pm_domain
*genpd
;
547 dev_dbg(dev
, "%s()\n", __func__
);
549 genpd
= dev_to_genpd(dev
);
553 might_sleep_if(!genpd
->dev_irq_safe
);
555 /* If power.irq_safe, the PM domain is never powered off. */
556 if (dev
->power
.irq_safe
)
559 mutex_lock(&genpd
->lock
);
560 ret
= __pm_genpd_poweron(genpd
);
562 mutex_unlock(&genpd
->lock
);
565 genpd
->status
= GPD_STATE_BUSY
;
566 genpd
->resume_count
++;
568 prepare_to_wait(&genpd
->status_wait_queue
, &wait
,
569 TASK_UNINTERRUPTIBLE
);
571 * If current is the powering off task, we have been called
572 * reentrantly from one of the device callbacks, so we should
575 if (!genpd
->poweroff_task
|| genpd
->poweroff_task
== current
)
577 mutex_unlock(&genpd
->lock
);
581 mutex_lock(&genpd
->lock
);
583 finish_wait(&genpd
->status_wait_queue
, &wait
);
584 __pm_genpd_restore_device(dev
->power
.subsys_data
->domain_data
, genpd
);
585 genpd
->resume_count
--;
586 genpd_set_active(genpd
);
587 wake_up_all(&genpd
->status_wait_queue
);
588 mutex_unlock(&genpd
->lock
);
591 genpd_start_dev(genpd
, dev
);
597 * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.
599 void pm_genpd_poweroff_unused(void)
601 struct generic_pm_domain
*genpd
;
603 mutex_lock(&gpd_list_lock
);
605 list_for_each_entry(genpd
, &gpd_list
, gpd_list_node
)
606 genpd_queue_power_off_work(genpd
);
608 mutex_unlock(&gpd_list_lock
);
613 static inline void genpd_power_off_work_fn(struct work_struct
*work
) {}
615 #define pm_genpd_runtime_suspend NULL
616 #define pm_genpd_runtime_resume NULL
618 #endif /* CONFIG_PM_RUNTIME */
620 #ifdef CONFIG_PM_SLEEP
622 static bool genpd_dev_active_wakeup(struct generic_pm_domain
*genpd
,
625 return GENPD_DEV_CALLBACK(genpd
, bool, active_wakeup
, dev
);
628 static int genpd_suspend_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
630 return GENPD_DEV_CALLBACK(genpd
, int, suspend
, dev
);
633 static int genpd_suspend_late(struct generic_pm_domain
*genpd
, struct device
*dev
)
635 return GENPD_DEV_CALLBACK(genpd
, int, suspend_late
, dev
);
638 static int genpd_resume_early(struct generic_pm_domain
*genpd
, struct device
*dev
)
640 return GENPD_DEV_CALLBACK(genpd
, int, resume_early
, dev
);
643 static int genpd_resume_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
645 return GENPD_DEV_CALLBACK(genpd
, int, resume
, dev
);
648 static int genpd_freeze_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
650 return GENPD_DEV_CALLBACK(genpd
, int, freeze
, dev
);
653 static int genpd_freeze_late(struct generic_pm_domain
*genpd
, struct device
*dev
)
655 return GENPD_DEV_CALLBACK(genpd
, int, freeze_late
, dev
);
658 static int genpd_thaw_early(struct generic_pm_domain
*genpd
, struct device
*dev
)
660 return GENPD_DEV_CALLBACK(genpd
, int, thaw_early
, dev
);
663 static int genpd_thaw_dev(struct generic_pm_domain
*genpd
, struct device
*dev
)
665 return GENPD_DEV_CALLBACK(genpd
, int, thaw
, dev
);
669 * pm_genpd_sync_poweroff - Synchronously power off a PM domain and its masters.
670 * @genpd: PM domain to power off, if possible.
672 * Check if the given PM domain can be powered off (during system suspend or
673 * hibernation) and do that if so. Also, in that case propagate to its masters.
675 * This function is only called in "noirq" stages of system power transitions,
676 * so it need not acquire locks (all of the "noirq" callbacks are executed
677 * sequentially, so it is guaranteed that it will never run twice in parallel).
679 static void pm_genpd_sync_poweroff(struct generic_pm_domain
*genpd
)
681 struct gpd_link
*link
;
683 if (genpd
->status
== GPD_STATE_POWER_OFF
)
686 if (genpd
->suspended_count
!= genpd
->device_count
687 || atomic_read(&genpd
->sd_count
) > 0)
690 if (genpd
->power_off
)
691 genpd
->power_off(genpd
);
693 genpd
->status
= GPD_STATE_POWER_OFF
;
695 list_for_each_entry(link
, &genpd
->slave_links
, slave_node
) {
696 genpd_sd_counter_dec(link
->master
);
697 pm_genpd_sync_poweroff(link
->master
);
702 * resume_needed - Check whether to resume a device before system suspend.
703 * @dev: Device to check.
704 * @genpd: PM domain the device belongs to.
706 * There are two cases in which a device that can wake up the system from sleep
707 * states should be resumed by pm_genpd_prepare(): (1) if the device is enabled
708 * to wake up the system and it has to remain active for this purpose while the
709 * system is in the sleep state and (2) if the device is not enabled to wake up
710 * the system from sleep states and it generally doesn't generate wakeup signals
711 * by itself (those signals are generated on its behalf by other parts of the
712 * system). In the latter case it may be necessary to reconfigure the device's
713 * wakeup settings during system suspend, because it may have been set up to
714 * signal remote wakeup from the system's working state as needed by runtime PM.
715 * Return 'true' in either of the above cases.
717 static bool resume_needed(struct device
*dev
, struct generic_pm_domain
*genpd
)
721 if (!device_can_wakeup(dev
))
724 active_wakeup
= genpd_dev_active_wakeup(genpd
, dev
);
725 return device_may_wakeup(dev
) ? active_wakeup
: !active_wakeup
;
729 * pm_genpd_prepare - Start power transition of a device in a PM domain.
730 * @dev: Device to start the transition of.
732 * Start a power transition of a device (during a system-wide power transition)
733 * under the assumption that its pm_domain field points to the domain member of
734 * an object of type struct generic_pm_domain representing a PM domain
735 * consisting of I/O devices.
737 static int pm_genpd_prepare(struct device
*dev
)
739 struct generic_pm_domain
*genpd
;
742 dev_dbg(dev
, "%s()\n", __func__
);
744 genpd
= dev_to_genpd(dev
);
749 * If a wakeup request is pending for the device, it should be woken up
750 * at this point and a system wakeup event should be reported if it's
751 * set up to wake up the system from sleep states.
753 pm_runtime_get_noresume(dev
);
754 if (pm_runtime_barrier(dev
) && device_may_wakeup(dev
))
755 pm_wakeup_event(dev
, 0);
757 if (pm_wakeup_pending()) {
758 pm_runtime_put_sync(dev
);
762 if (resume_needed(dev
, genpd
))
763 pm_runtime_resume(dev
);
765 genpd_acquire_lock(genpd
);
767 if (genpd
->prepared_count
++ == 0) {
768 genpd
->suspended_count
= 0;
769 genpd
->suspend_power_off
= genpd
->status
== GPD_STATE_POWER_OFF
;
772 genpd_release_lock(genpd
);
774 if (genpd
->suspend_power_off
) {
775 pm_runtime_put_noidle(dev
);
780 * The PM domain must be in the GPD_STATE_ACTIVE state at this point,
781 * so pm_genpd_poweron() will return immediately, but if the device
782 * is suspended (e.g. it's been stopped by genpd_stop_dev()), we need
783 * to make it operational.
785 pm_runtime_resume(dev
);
786 __pm_runtime_disable(dev
, false);
788 ret
= pm_generic_prepare(dev
);
790 mutex_lock(&genpd
->lock
);
792 if (--genpd
->prepared_count
== 0)
793 genpd
->suspend_power_off
= false;
795 mutex_unlock(&genpd
->lock
);
796 pm_runtime_enable(dev
);
799 pm_runtime_put_sync(dev
);
804 * pm_genpd_suspend - Suspend a device belonging to an I/O PM domain.
805 * @dev: Device to suspend.
807 * Suspend a device under the assumption that its pm_domain field points to the
808 * domain member of an object of type struct generic_pm_domain representing
809 * a PM domain consisting of I/O devices.
811 static int pm_genpd_suspend(struct device
*dev
)
813 struct generic_pm_domain
*genpd
;
815 dev_dbg(dev
, "%s()\n", __func__
);
817 genpd
= dev_to_genpd(dev
);
821 return genpd
->suspend_power_off
? 0 : genpd_suspend_dev(genpd
, dev
);
825 * pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain.
826 * @dev: Device to suspend.
828 * Carry out a late suspend of a device under the assumption that its
829 * pm_domain field points to the domain member of an object of type
830 * struct generic_pm_domain representing a PM domain consisting of I/O devices.
832 static int pm_genpd_suspend_late(struct device
*dev
)
834 struct generic_pm_domain
*genpd
;
836 dev_dbg(dev
, "%s()\n", __func__
);
838 genpd
= dev_to_genpd(dev
);
842 return genpd
->suspend_power_off
? 0 : genpd_suspend_late(genpd
, dev
);
846 * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
847 * @dev: Device to suspend.
849 * Stop the device and remove power from the domain if all devices in it have
852 static int pm_genpd_suspend_noirq(struct device
*dev
)
854 struct generic_pm_domain
*genpd
;
856 dev_dbg(dev
, "%s()\n", __func__
);
858 genpd
= dev_to_genpd(dev
);
862 if (genpd
->suspend_power_off
863 || (dev
->power
.wakeup_path
&& genpd_dev_active_wakeup(genpd
, dev
)))
866 genpd_stop_dev(genpd
, dev
);
869 * Since all of the "noirq" callbacks are executed sequentially, it is
870 * guaranteed that this function will never run twice in parallel for
871 * the same PM domain, so it is not necessary to use locking here.
873 genpd
->suspended_count
++;
874 pm_genpd_sync_poweroff(genpd
);
880 * pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
881 * @dev: Device to resume.
883 * Restore power to the device's PM domain, if necessary, and start the device.
885 static int pm_genpd_resume_noirq(struct device
*dev
)
887 struct generic_pm_domain
*genpd
;
889 dev_dbg(dev
, "%s()\n", __func__
);
891 genpd
= dev_to_genpd(dev
);
895 if (genpd
->suspend_power_off
896 || (dev
->power
.wakeup_path
&& genpd_dev_active_wakeup(genpd
, dev
)))
900 * Since all of the "noirq" callbacks are executed sequentially, it is
901 * guaranteed that this function will never run twice in parallel for
902 * the same PM domain, so it is not necessary to use locking here.
904 pm_genpd_poweron(genpd
);
905 genpd
->suspended_count
--;
907 return genpd_start_dev(genpd
, dev
);
911 * pm_genpd_resume_early - Early resume of a device in an I/O PM domain.
912 * @dev: Device to resume.
914 * Carry out an early resume of a device under the assumption that its
915 * pm_domain field points to the domain member of an object of type
916 * struct generic_pm_domain representing a power domain consisting of I/O
919 static int pm_genpd_resume_early(struct device
*dev
)
921 struct generic_pm_domain
*genpd
;
923 dev_dbg(dev
, "%s()\n", __func__
);
925 genpd
= dev_to_genpd(dev
);
929 return genpd
->suspend_power_off
? 0 : genpd_resume_early(genpd
, dev
);
933 * pm_genpd_resume - Resume of device in an I/O PM domain.
934 * @dev: Device to resume.
936 * Resume a device under the assumption that its pm_domain field points to the
937 * domain member of an object of type struct generic_pm_domain representing
938 * a power domain consisting of I/O devices.
940 static int pm_genpd_resume(struct device
*dev
)
942 struct generic_pm_domain
*genpd
;
944 dev_dbg(dev
, "%s()\n", __func__
);
946 genpd
= dev_to_genpd(dev
);
950 return genpd
->suspend_power_off
? 0 : genpd_resume_dev(genpd
, dev
);
954 * pm_genpd_freeze - Freezing a device in an I/O PM domain.
955 * @dev: Device to freeze.
957 * Freeze a device under the assumption that its pm_domain field points to the
958 * domain member of an object of type struct generic_pm_domain representing
959 * a power domain consisting of I/O devices.
961 static int pm_genpd_freeze(struct device
*dev
)
963 struct generic_pm_domain
*genpd
;
965 dev_dbg(dev
, "%s()\n", __func__
);
967 genpd
= dev_to_genpd(dev
);
971 return genpd
->suspend_power_off
? 0 : genpd_freeze_dev(genpd
, dev
);
975 * pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain.
976 * @dev: Device to freeze.
978 * Carry out a late freeze of a device under the assumption that its
979 * pm_domain field points to the domain member of an object of type
980 * struct generic_pm_domain representing a power domain consisting of I/O
983 static int pm_genpd_freeze_late(struct device
*dev
)
985 struct generic_pm_domain
*genpd
;
987 dev_dbg(dev
, "%s()\n", __func__
);
989 genpd
= dev_to_genpd(dev
);
993 return genpd
->suspend_power_off
? 0 : genpd_freeze_late(genpd
, dev
);
997 * pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
998 * @dev: Device to freeze.
1000 * Carry out a late freeze of a device under the assumption that its
1001 * pm_domain field points to the domain member of an object of type
1002 * struct generic_pm_domain representing a power domain consisting of I/O
1005 static int pm_genpd_freeze_noirq(struct device
*dev
)
1007 struct generic_pm_domain
*genpd
;
1009 dev_dbg(dev
, "%s()\n", __func__
);
1011 genpd
= dev_to_genpd(dev
);
1015 return genpd
->suspend_power_off
? 0 : genpd_stop_dev(genpd
, dev
);
1019 * pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
1020 * @dev: Device to thaw.
1022 * Start the device, unless power has been removed from the domain already
1023 * before the system transition.
1025 static int pm_genpd_thaw_noirq(struct device
*dev
)
1027 struct generic_pm_domain
*genpd
;
1029 dev_dbg(dev
, "%s()\n", __func__
);
1031 genpd
= dev_to_genpd(dev
);
1035 return genpd
->suspend_power_off
? 0 : genpd_start_dev(genpd
, dev
);
1039 * pm_genpd_thaw_early - Early thaw of device in an I/O PM domain.
1040 * @dev: Device to thaw.
1042 * Carry out an early thaw of a device under the assumption that its
1043 * pm_domain field points to the domain member of an object of type
1044 * struct generic_pm_domain representing a power domain consisting of I/O
1047 static int pm_genpd_thaw_early(struct device
*dev
)
1049 struct generic_pm_domain
*genpd
;
1051 dev_dbg(dev
, "%s()\n", __func__
);
1053 genpd
= dev_to_genpd(dev
);
1057 return genpd
->suspend_power_off
? 0 : genpd_thaw_early(genpd
, dev
);
1061 * pm_genpd_thaw - Thaw a device belonging to an I/O power domain.
1062 * @dev: Device to thaw.
1064 * Thaw a device under the assumption that its pm_domain field points to the
1065 * domain member of an object of type struct generic_pm_domain representing
1066 * a power domain consisting of I/O devices.
1068 static int pm_genpd_thaw(struct device
*dev
)
1070 struct generic_pm_domain
*genpd
;
1072 dev_dbg(dev
, "%s()\n", __func__
);
1074 genpd
= dev_to_genpd(dev
);
1078 return genpd
->suspend_power_off
? 0 : genpd_thaw_dev(genpd
, dev
);
1082 * pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain.
1083 * @dev: Device to resume.
1085 * Make sure the domain will be in the same power state as before the
1086 * hibernation the system is resuming from and start the device if necessary.
1088 static int pm_genpd_restore_noirq(struct device
*dev
)
1090 struct generic_pm_domain
*genpd
;
1092 dev_dbg(dev
, "%s()\n", __func__
);
1094 genpd
= dev_to_genpd(dev
);
1099 * Since all of the "noirq" callbacks are executed sequentially, it is
1100 * guaranteed that this function will never run twice in parallel for
1101 * the same PM domain, so it is not necessary to use locking here.
1103 * At this point suspended_count == 0 means we are being run for the
1104 * first time for the given domain in the present cycle.
1106 if (genpd
->suspended_count
++ == 0) {
1108 * The boot kernel might put the domain into arbitrary state,
1109 * so make it appear as powered off to pm_genpd_poweron(), so
1110 * that it tries to power it on in case it was really off.
1112 genpd
->status
= GPD_STATE_POWER_OFF
;
1113 if (genpd
->suspend_power_off
) {
1115 * If the domain was off before the hibernation, make
1116 * sure it will be off going forward.
1118 if (genpd
->power_off
)
1119 genpd
->power_off(genpd
);
1125 pm_genpd_poweron(genpd
);
1127 return genpd_start_dev(genpd
, dev
);
1131 * pm_genpd_complete - Complete power transition of a device in a power domain.
1132 * @dev: Device to complete the transition of.
1134 * Complete a power transition of a device (during a system-wide power
1135 * transition) under the assumption that its pm_domain field points to the
1136 * domain member of an object of type struct generic_pm_domain representing
1137 * a power domain consisting of I/O devices.
1139 static void pm_genpd_complete(struct device
*dev
)
1141 struct generic_pm_domain
*genpd
;
1144 dev_dbg(dev
, "%s()\n", __func__
);
1146 genpd
= dev_to_genpd(dev
);
1150 mutex_lock(&genpd
->lock
);
1152 run_complete
= !genpd
->suspend_power_off
;
1153 if (--genpd
->prepared_count
== 0)
1154 genpd
->suspend_power_off
= false;
1156 mutex_unlock(&genpd
->lock
);
1159 pm_generic_complete(dev
);
1160 pm_runtime_set_active(dev
);
1161 pm_runtime_enable(dev
);
1162 pm_runtime_idle(dev
);
1168 #define pm_genpd_prepare NULL
1169 #define pm_genpd_suspend NULL
1170 #define pm_genpd_suspend_late NULL
1171 #define pm_genpd_suspend_noirq NULL
1172 #define pm_genpd_resume_early NULL
1173 #define pm_genpd_resume_noirq NULL
1174 #define pm_genpd_resume NULL
1175 #define pm_genpd_freeze NULL
1176 #define pm_genpd_freeze_late NULL
1177 #define pm_genpd_freeze_noirq NULL
1178 #define pm_genpd_thaw_early NULL
1179 #define pm_genpd_thaw_noirq NULL
1180 #define pm_genpd_thaw NULL
1181 #define pm_genpd_restore_noirq NULL
1182 #define pm_genpd_complete NULL
1184 #endif /* CONFIG_PM_SLEEP */
1187 * __pm_genpd_add_device - Add a device to an I/O PM domain.
1188 * @genpd: PM domain to add the device to.
1189 * @dev: Device to be added.
1190 * @td: Set of PM QoS timing parameters to attach to the device.
1192 int __pm_genpd_add_device(struct generic_pm_domain
*genpd
, struct device
*dev
,
1193 struct gpd_timing_data
*td
)
1195 struct generic_pm_domain_data
*gpd_data
;
1196 struct pm_domain_data
*pdd
;
1199 dev_dbg(dev
, "%s()\n", __func__
);
1201 if (IS_ERR_OR_NULL(genpd
) || IS_ERR_OR_NULL(dev
))
1204 genpd_acquire_lock(genpd
);
1206 if (genpd
->status
== GPD_STATE_POWER_OFF
) {
1211 if (genpd
->prepared_count
> 0) {
1216 list_for_each_entry(pdd
, &genpd
->dev_list
, list_node
)
1217 if (pdd
->dev
== dev
) {
1222 gpd_data
= kzalloc(sizeof(*gpd_data
), GFP_KERNEL
);
1228 genpd
->device_count
++;
1230 dev
->pm_domain
= &genpd
->domain
;
1231 dev_pm_get_subsys_data(dev
);
1232 dev
->power
.subsys_data
->domain_data
= &gpd_data
->base
;
1233 gpd_data
->base
.dev
= dev
;
1234 gpd_data
->need_restore
= false;
1235 list_add_tail(&gpd_data
->base
.list_node
, &genpd
->dev_list
);
1240 genpd_release_lock(genpd
);
1246 * __pm_genpd_of_add_device - Add a device to an I/O PM domain.
1247 * @genpd_node: Device tree node pointer representing a PM domain to which the
1248 * the device is added to.
1249 * @dev: Device to be added.
1250 * @td: Set of PM QoS timing parameters to attach to the device.
1252 int __pm_genpd_of_add_device(struct device_node
*genpd_node
, struct device
*dev
,
1253 struct gpd_timing_data
*td
)
1255 struct generic_pm_domain
*genpd
= NULL
, *gpd
;
1257 dev_dbg(dev
, "%s()\n", __func__
);
1259 if (IS_ERR_OR_NULL(genpd_node
) || IS_ERR_OR_NULL(dev
))
1262 mutex_lock(&gpd_list_lock
);
1263 list_for_each_entry(gpd
, &gpd_list
, gpd_list_node
) {
1264 if (gpd
->of_node
== genpd_node
) {
1269 mutex_unlock(&gpd_list_lock
);
1274 return __pm_genpd_add_device(genpd
, dev
, td
);
1278 * pm_genpd_remove_device - Remove a device from an I/O PM domain.
1279 * @genpd: PM domain to remove the device from.
1280 * @dev: Device to be removed.
1282 int pm_genpd_remove_device(struct generic_pm_domain
*genpd
,
1285 struct pm_domain_data
*pdd
;
1288 dev_dbg(dev
, "%s()\n", __func__
);
1290 if (IS_ERR_OR_NULL(genpd
) || IS_ERR_OR_NULL(dev
))
1293 genpd_acquire_lock(genpd
);
1295 if (genpd
->prepared_count
> 0) {
1300 list_for_each_entry(pdd
, &genpd
->dev_list
, list_node
) {
1301 if (pdd
->dev
!= dev
)
1304 list_del_init(&pdd
->list_node
);
1306 dev_pm_put_subsys_data(dev
);
1307 dev
->pm_domain
= NULL
;
1308 kfree(to_gpd_data(pdd
));
1310 genpd
->device_count
--;
1317 genpd_release_lock(genpd
);
1323 * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain.
1324 * @genpd: Master PM domain to add the subdomain to.
1325 * @subdomain: Subdomain to be added.
1327 int pm_genpd_add_subdomain(struct generic_pm_domain
*genpd
,
1328 struct generic_pm_domain
*subdomain
)
1330 struct gpd_link
*link
;
1333 if (IS_ERR_OR_NULL(genpd
) || IS_ERR_OR_NULL(subdomain
))
1337 genpd_acquire_lock(genpd
);
1338 mutex_lock_nested(&subdomain
->lock
, SINGLE_DEPTH_NESTING
);
1340 if (subdomain
->status
!= GPD_STATE_POWER_OFF
1341 && subdomain
->status
!= GPD_STATE_ACTIVE
) {
1342 mutex_unlock(&subdomain
->lock
);
1343 genpd_release_lock(genpd
);
1347 if (genpd
->status
== GPD_STATE_POWER_OFF
1348 && subdomain
->status
!= GPD_STATE_POWER_OFF
) {
1353 list_for_each_entry(link
, &genpd
->slave_links
, slave_node
) {
1354 if (link
->slave
== subdomain
&& link
->master
== genpd
) {
1360 link
= kzalloc(sizeof(*link
), GFP_KERNEL
);
1365 link
->master
= genpd
;
1366 list_add_tail(&link
->master_node
, &genpd
->master_links
);
1367 link
->slave
= subdomain
;
1368 list_add_tail(&link
->slave_node
, &subdomain
->slave_links
);
1369 if (subdomain
->status
!= GPD_STATE_POWER_OFF
)
1370 genpd_sd_counter_inc(genpd
);
1373 mutex_unlock(&subdomain
->lock
);
1374 genpd_release_lock(genpd
);
1380 * pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
1381 * @genpd: Master PM domain to remove the subdomain from.
1382 * @subdomain: Subdomain to be removed.
1384 int pm_genpd_remove_subdomain(struct generic_pm_domain
*genpd
,
1385 struct generic_pm_domain
*subdomain
)
1387 struct gpd_link
*link
;
1390 if (IS_ERR_OR_NULL(genpd
) || IS_ERR_OR_NULL(subdomain
))
1394 genpd_acquire_lock(genpd
);
1396 list_for_each_entry(link
, &genpd
->master_links
, master_node
) {
1397 if (link
->slave
!= subdomain
)
1400 mutex_lock_nested(&subdomain
->lock
, SINGLE_DEPTH_NESTING
);
1402 if (subdomain
->status
!= GPD_STATE_POWER_OFF
1403 && subdomain
->status
!= GPD_STATE_ACTIVE
) {
1404 mutex_unlock(&subdomain
->lock
);
1405 genpd_release_lock(genpd
);
1409 list_del(&link
->master_node
);
1410 list_del(&link
->slave_node
);
1412 if (subdomain
->status
!= GPD_STATE_POWER_OFF
)
1413 genpd_sd_counter_dec(genpd
);
1415 mutex_unlock(&subdomain
->lock
);
1421 genpd_release_lock(genpd
);
1427 * pm_genpd_add_callbacks - Add PM domain callbacks to a given device.
1428 * @dev: Device to add the callbacks to.
1429 * @ops: Set of callbacks to add.
1430 * @td: Timing data to add to the device along with the callbacks (optional).
1432 int pm_genpd_add_callbacks(struct device
*dev
, struct gpd_dev_ops
*ops
,
1433 struct gpd_timing_data
*td
)
1435 struct pm_domain_data
*pdd
;
1438 if (!(dev
&& dev
->power
.subsys_data
&& ops
))
1441 pm_runtime_disable(dev
);
1444 pdd
= dev
->power
.subsys_data
->domain_data
;
1446 struct generic_pm_domain_data
*gpd_data
= to_gpd_data(pdd
);
1448 gpd_data
->ops
= *ops
;
1456 pm_runtime_enable(dev
);
1460 EXPORT_SYMBOL_GPL(pm_genpd_add_callbacks
);
1463 * __pm_genpd_remove_callbacks - Remove PM domain callbacks from a given device.
1464 * @dev: Device to remove the callbacks from.
1465 * @clear_td: If set, clear the device's timing data too.
1467 int __pm_genpd_remove_callbacks(struct device
*dev
, bool clear_td
)
1469 struct pm_domain_data
*pdd
;
1472 if (!(dev
&& dev
->power
.subsys_data
))
1475 pm_runtime_disable(dev
);
1478 pdd
= dev
->power
.subsys_data
->domain_data
;
1480 struct generic_pm_domain_data
*gpd_data
= to_gpd_data(pdd
);
1482 gpd_data
->ops
= (struct gpd_dev_ops
){ 0 };
1484 gpd_data
->td
= (struct gpd_timing_data
){ 0 };
1490 pm_runtime_enable(dev
);
1494 EXPORT_SYMBOL_GPL(__pm_genpd_remove_callbacks
);
1496 /* Default device callbacks for generic PM domains. */
1499 * pm_genpd_default_save_state - Default "save device state" for PM domians.
1500 * @dev: Device to handle.
1502 static int pm_genpd_default_save_state(struct device
*dev
)
1504 int (*cb
)(struct device
*__dev
);
1505 struct device_driver
*drv
= dev
->driver
;
1507 cb
= dev_gpd_data(dev
)->ops
.save_state
;
1511 if (drv
&& drv
->pm
&& drv
->pm
->runtime_suspend
)
1512 return drv
->pm
->runtime_suspend(dev
);
1518 * pm_genpd_default_restore_state - Default PM domians "restore device state".
1519 * @dev: Device to handle.
1521 static int pm_genpd_default_restore_state(struct device
*dev
)
1523 int (*cb
)(struct device
*__dev
);
1524 struct device_driver
*drv
= dev
->driver
;
1526 cb
= dev_gpd_data(dev
)->ops
.restore_state
;
1530 if (drv
&& drv
->pm
&& drv
->pm
->runtime_resume
)
1531 return drv
->pm
->runtime_resume(dev
);
1536 #ifdef CONFIG_PM_SLEEP
1539 * pm_genpd_default_suspend - Default "device suspend" for PM domians.
1540 * @dev: Device to handle.
1542 static int pm_genpd_default_suspend(struct device
*dev
)
1544 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.suspend
;
1546 return cb
? cb(dev
) : pm_generic_suspend(dev
);
1550 * pm_genpd_default_suspend_late - Default "late device suspend" for PM domians.
1551 * @dev: Device to handle.
1553 static int pm_genpd_default_suspend_late(struct device
*dev
)
1555 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.suspend_late
;
1557 return cb
? cb(dev
) : pm_generic_suspend_late(dev
);
1561 * pm_genpd_default_resume_early - Default "early device resume" for PM domians.
1562 * @dev: Device to handle.
1564 static int pm_genpd_default_resume_early(struct device
*dev
)
1566 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.resume_early
;
1568 return cb
? cb(dev
) : pm_generic_resume_early(dev
);
1572 * pm_genpd_default_resume - Default "device resume" for PM domians.
1573 * @dev: Device to handle.
1575 static int pm_genpd_default_resume(struct device
*dev
)
1577 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.resume
;
1579 return cb
? cb(dev
) : pm_generic_resume(dev
);
1583 * pm_genpd_default_freeze - Default "device freeze" for PM domians.
1584 * @dev: Device to handle.
1586 static int pm_genpd_default_freeze(struct device
*dev
)
1588 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.freeze
;
1590 return cb
? cb(dev
) : pm_generic_freeze(dev
);
1594 * pm_genpd_default_freeze_late - Default "late device freeze" for PM domians.
1595 * @dev: Device to handle.
1597 static int pm_genpd_default_freeze_late(struct device
*dev
)
1599 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.freeze_late
;
1601 return cb
? cb(dev
) : pm_generic_freeze_late(dev
);
1605 * pm_genpd_default_thaw_early - Default "early device thaw" for PM domians.
1606 * @dev: Device to handle.
1608 static int pm_genpd_default_thaw_early(struct device
*dev
)
1610 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.thaw_early
;
1612 return cb
? cb(dev
) : pm_generic_thaw_early(dev
);
1616 * pm_genpd_default_thaw - Default "device thaw" for PM domians.
1617 * @dev: Device to handle.
1619 static int pm_genpd_default_thaw(struct device
*dev
)
1621 int (*cb
)(struct device
*__dev
) = dev_gpd_data(dev
)->ops
.thaw
;
1623 return cb
? cb(dev
) : pm_generic_thaw(dev
);
1626 #else /* !CONFIG_PM_SLEEP */
1628 #define pm_genpd_default_suspend NULL
1629 #define pm_genpd_default_suspend_late NULL
1630 #define pm_genpd_default_resume_early NULL
1631 #define pm_genpd_default_resume NULL
1632 #define pm_genpd_default_freeze NULL
1633 #define pm_genpd_default_freeze_late NULL
1634 #define pm_genpd_default_thaw_early NULL
1635 #define pm_genpd_default_thaw NULL
1637 #endif /* !CONFIG_PM_SLEEP */
1640 * pm_genpd_init - Initialize a generic I/O PM domain object.
1641 * @genpd: PM domain object to initialize.
1642 * @gov: PM domain governor to associate with the domain (may be NULL).
1643 * @is_off: Initial value of the domain's power_is_off field.
1645 void pm_genpd_init(struct generic_pm_domain
*genpd
,
1646 struct dev_power_governor
*gov
, bool is_off
)
1648 if (IS_ERR_OR_NULL(genpd
))
1651 INIT_LIST_HEAD(&genpd
->master_links
);
1652 INIT_LIST_HEAD(&genpd
->slave_links
);
1653 INIT_LIST_HEAD(&genpd
->dev_list
);
1654 mutex_init(&genpd
->lock
);
1656 INIT_WORK(&genpd
->power_off_work
, genpd_power_off_work_fn
);
1657 genpd
->in_progress
= 0;
1658 atomic_set(&genpd
->sd_count
, 0);
1659 genpd
->status
= is_off
? GPD_STATE_POWER_OFF
: GPD_STATE_ACTIVE
;
1660 init_waitqueue_head(&genpd
->status_wait_queue
);
1661 genpd
->poweroff_task
= NULL
;
1662 genpd
->resume_count
= 0;
1663 genpd
->device_count
= 0;
1664 genpd
->max_off_time_ns
= -1;
1665 genpd
->domain
.ops
.runtime_suspend
= pm_genpd_runtime_suspend
;
1666 genpd
->domain
.ops
.runtime_resume
= pm_genpd_runtime_resume
;
1667 genpd
->domain
.ops
.runtime_idle
= pm_generic_runtime_idle
;
1668 genpd
->domain
.ops
.prepare
= pm_genpd_prepare
;
1669 genpd
->domain
.ops
.suspend
= pm_genpd_suspend
;
1670 genpd
->domain
.ops
.suspend_late
= pm_genpd_suspend_late
;
1671 genpd
->domain
.ops
.suspend_noirq
= pm_genpd_suspend_noirq
;
1672 genpd
->domain
.ops
.resume_noirq
= pm_genpd_resume_noirq
;
1673 genpd
->domain
.ops
.resume_early
= pm_genpd_resume_early
;
1674 genpd
->domain
.ops
.resume
= pm_genpd_resume
;
1675 genpd
->domain
.ops
.freeze
= pm_genpd_freeze
;
1676 genpd
->domain
.ops
.freeze_late
= pm_genpd_freeze_late
;
1677 genpd
->domain
.ops
.freeze_noirq
= pm_genpd_freeze_noirq
;
1678 genpd
->domain
.ops
.thaw_noirq
= pm_genpd_thaw_noirq
;
1679 genpd
->domain
.ops
.thaw_early
= pm_genpd_thaw_early
;
1680 genpd
->domain
.ops
.thaw
= pm_genpd_thaw
;
1681 genpd
->domain
.ops
.poweroff
= pm_genpd_suspend
;
1682 genpd
->domain
.ops
.poweroff_late
= pm_genpd_suspend_late
;
1683 genpd
->domain
.ops
.poweroff_noirq
= pm_genpd_suspend_noirq
;
1684 genpd
->domain
.ops
.restore_noirq
= pm_genpd_restore_noirq
;
1685 genpd
->domain
.ops
.restore_early
= pm_genpd_resume_early
;
1686 genpd
->domain
.ops
.restore
= pm_genpd_resume
;
1687 genpd
->domain
.ops
.complete
= pm_genpd_complete
;
1688 genpd
->dev_ops
.save_state
= pm_genpd_default_save_state
;
1689 genpd
->dev_ops
.restore_state
= pm_genpd_default_restore_state
;
1690 genpd
->dev_ops
.suspend
= pm_genpd_default_suspend
;
1691 genpd
->dev_ops
.suspend_late
= pm_genpd_default_suspend_late
;
1692 genpd
->dev_ops
.resume_early
= pm_genpd_default_resume_early
;
1693 genpd
->dev_ops
.resume
= pm_genpd_default_resume
;
1694 genpd
->dev_ops
.freeze
= pm_genpd_default_freeze
;
1695 genpd
->dev_ops
.freeze_late
= pm_genpd_default_freeze_late
;
1696 genpd
->dev_ops
.thaw_early
= pm_genpd_default_thaw_early
;
1697 genpd
->dev_ops
.thaw
= pm_genpd_default_thaw
;
1698 mutex_lock(&gpd_list_lock
);
1699 list_add(&genpd
->gpd_list_node
, &gpd_list
);
1700 mutex_unlock(&gpd_list_lock
);