Lines Matching +full:power +full:- +full:domain
1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain.c - Common code related to device power domains.
26 #include "power.h"
35 __routine = genpd->dev_ops.callback; \
54 mutex_lock(&genpd->mlock); in genpd_lock_mtx()
60 mutex_lock_nested(&genpd->mlock, depth); in genpd_lock_nested_mtx()
65 return mutex_lock_interruptible(&genpd->mlock); in genpd_lock_interruptible_mtx()
70 return mutex_unlock(&genpd->mlock); in genpd_unlock_mtx()
81 __acquires(&genpd->slock) in genpd_lock_spin()
85 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_spin()
86 genpd->lock_flags = flags; in genpd_lock_spin()
91 __acquires(&genpd->slock) in genpd_lock_nested_spin()
95 spin_lock_irqsave_nested(&genpd->slock, flags, depth); in genpd_lock_nested_spin()
96 genpd->lock_flags = flags; in genpd_lock_nested_spin()
100 __acquires(&genpd->slock) in genpd_lock_interruptible_spin()
104 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_interruptible_spin()
105 genpd->lock_flags = flags; in genpd_lock_interruptible_spin()
110 __releases(&genpd->slock) in genpd_unlock_spin()
112 spin_unlock_irqrestore(&genpd->slock, genpd->lock_flags); in genpd_unlock_spin()
122 #define genpd_lock(p) p->lock_ops->lock(p)
123 #define genpd_lock_nested(p, d) p->lock_ops->lock_nested(p, d)
124 #define genpd_lock_interruptible(p) p->lock_ops->lock_interruptible(p)
125 #define genpd_unlock(p) p->lock_ops->unlock(p)
127 #define genpd_status_on(genpd) (genpd->status == GENPD_STATE_ON)
128 #define genpd_is_irq_safe(genpd) (genpd->flags & GENPD_FLAG_IRQ_SAFE)
129 #define genpd_is_always_on(genpd) (genpd->flags & GENPD_FLAG_ALWAYS_ON)
130 #define genpd_is_active_wakeup(genpd) (genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP)
131 #define genpd_is_cpu_domain(genpd) (genpd->flags & GENPD_FLAG_CPU_DOMAIN)
132 #define genpd_is_rpm_always_on(genpd) (genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
142 * Warn once if an IRQ safe device is attached to a no sleep domain, as in irq_safe_dev_in_no_sleep_domain()
144 * domain this isn't case, thus don't warn. in irq_safe_dev_in_no_sleep_domain()
147 dev_warn_once(dev, "PM domain %s will not be powered off\n", in irq_safe_dev_in_no_sleep_domain()
148 genpd->name); in irq_safe_dev_in_no_sleep_domain()
156 * Get the generic PM domain for a particular struct device.
157 * This validates the struct device pointer, the PM domain pointer,
158 * and checks that the PM domain pointer is a real generic PM domain.
163 if (IS_ERR_OR_NULL(dev) || IS_ERR_OR_NULL(dev->pm_domain)) in dev_to_genpd_safe()
166 /* A genpd's always have its ->runtime_suspend() callback assigned. */ in dev_to_genpd_safe()
167 if (dev->pm_domain->ops.runtime_suspend == genpd_runtime_suspend) in dev_to_genpd_safe()
168 return pd_to_genpd(dev->pm_domain); in dev_to_genpd_safe()
175 * attached to the device is a genpd domain.
179 if (IS_ERR_OR_NULL(dev->pm_domain)) in dev_to_genpd()
180 return ERR_PTR(-EINVAL); in dev_to_genpd()
182 return pd_to_genpd(dev->pm_domain); in dev_to_genpd()
201 if (!WARN_ON(atomic_read(&genpd->sd_count) == 0)) in genpd_sd_counter_dec()
202 ret = !!atomic_dec_and_test(&genpd->sd_count); in genpd_sd_counter_dec()
209 atomic_inc(&genpd->sd_count); in genpd_sd_counter_inc()
222 d = debugfs_lookup(genpd->name, genpd_debugfs_dir); in genpd_debug_remove()
231 delta = ktime_sub(now, genpd->accounting_time); in genpd_update_accounting()
234 * If genpd->status is active, it means we are just in genpd_update_accounting()
238 if (genpd->status == GENPD_STATE_ON) { in genpd_update_accounting()
239 int state_idx = genpd->state_idx; in genpd_update_accounting()
241 genpd->states[state_idx].idle_time = in genpd_update_accounting()
242 ktime_add(genpd->states[state_idx].idle_time, delta); in genpd_update_accounting()
244 genpd->on_time = ktime_add(genpd->on_time, delta); in genpd_update_accounting()
247 genpd->accounting_time = now; in genpd_update_accounting()
263 if (state == genpd->performance_state) in _genpd_reeval_performance_state()
267 if (state > genpd->performance_state) in _genpd_reeval_performance_state()
270 /* Traverse all devices within the domain */ in _genpd_reeval_performance_state()
271 list_for_each_entry(pdd, &genpd->dev_list, list_node) { in _genpd_reeval_performance_state()
274 if (pd_data->performance_state > state) in _genpd_reeval_performance_state()
275 state = pd_data->performance_state; in _genpd_reeval_performance_state()
279 * Traverse all sub-domains within the domain. This can be in _genpd_reeval_performance_state()
280 * done without any additional locking as the link->performance_state in _genpd_reeval_performance_state()
281 * field is protected by the parent genpd->lock, which is already taken. in _genpd_reeval_performance_state()
283 * Also note that link->performance_state (subdomain's performance state in _genpd_reeval_performance_state()
284 * requirement to parent domain) is different from in _genpd_reeval_performance_state()
285 * link->child->performance_state (current performance state requirement in _genpd_reeval_performance_state()
286 * of the devices/sub-domains of the subdomain) and so can have a in _genpd_reeval_performance_state()
289 * Note that we also take vote from powered-off sub-domains into account in _genpd_reeval_performance_state()
292 list_for_each_entry(link, &genpd->parent_links, parent_node) { in _genpd_reeval_performance_state()
293 if (link->performance_state > state) in _genpd_reeval_performance_state()
294 state = link->performance_state; in _genpd_reeval_performance_state()
304 if (!parent->set_performance_state) in genpd_xlate_performance_state()
307 return dev_pm_opp_xlate_performance_state(genpd->opp_table, in genpd_xlate_performance_state()
308 parent->opp_table, in genpd_xlate_performance_state()
319 if (state == genpd->performance_state) in _genpd_set_performance_state()
323 list_for_each_entry(link, &genpd->child_links, child_node) { in _genpd_set_performance_state()
324 parent = link->parent; in _genpd_set_performance_state()
335 link->prev_performance_state = link->performance_state; in _genpd_set_performance_state()
336 link->performance_state = parent_state; in _genpd_set_performance_state()
341 link->performance_state = link->prev_performance_state; in _genpd_set_performance_state()
349 if (genpd->set_performance_state) { in _genpd_set_performance_state()
350 ret = genpd->set_performance_state(genpd, state); in _genpd_set_performance_state()
355 genpd->performance_state = state; in _genpd_set_performance_state()
360 list_for_each_entry_continue_reverse(link, &genpd->child_links, in _genpd_set_performance_state()
362 parent = link->parent; in _genpd_set_performance_state()
366 parent_state = link->prev_performance_state; in _genpd_set_performance_state()
367 link->performance_state = parent_state; in _genpd_set_performance_state()
373 parent->name, parent_state); in _genpd_set_performance_state()
389 prev_state = gpd_data->performance_state; in genpd_set_performance_state()
393 gpd_data->performance_state = state; in genpd_set_performance_state()
398 gpd_data->performance_state = prev_state; in genpd_set_performance_state()
405 unsigned int prev_state = dev_gpd_data(dev)->performance_state; in genpd_drop_performance_state()
421 * dev_pm_genpd_set_performance_state- Set performance state of device's power
422 * domain.
424 * @dev: Device for which the performance-state needs to be set.
442 return -ENODEV; in dev_pm_genpd_set_performance_state()
444 if (WARN_ON(!dev->power.subsys_data || in dev_pm_genpd_set_performance_state()
445 !dev->power.subsys_data->domain_data)) in dev_pm_genpd_set_performance_state()
446 return -EINVAL; in dev_pm_genpd_set_performance_state()
450 dev_gpd_data(dev)->rpm_pstate = state; in dev_pm_genpd_set_performance_state()
454 dev_gpd_data(dev)->rpm_pstate = 0; in dev_pm_genpd_set_performance_state()
463 * dev_pm_genpd_set_next_wakeup - Notify PM framework of an impending wakeup.
475 * about that, so stale @next will be ignored when powering off the domain.
486 gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); in dev_pm_genpd_set_next_wakeup()
487 gpd_data->next_wakeup = next; in dev_pm_genpd_set_next_wakeup()
493 unsigned int state_idx = genpd->state_idx; in _genpd_power_on()
498 /* Notify consumers that we are about to power on. */ in _genpd_power_on()
499 ret = raw_notifier_call_chain_robust(&genpd->power_notifiers, in _genpd_power_on()
506 if (!genpd->power_on) in _genpd_power_on()
510 ret = genpd->power_on(genpd); in _genpd_power_on()
518 ret = genpd->power_on(genpd); in _genpd_power_on()
523 if (elapsed_ns <= genpd->states[state_idx].power_on_latency_ns) in _genpd_power_on()
526 genpd->states[state_idx].power_on_latency_ns = elapsed_ns; in _genpd_power_on()
527 genpd->max_off_time_changed = true; in _genpd_power_on()
528 pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", in _genpd_power_on()
529 genpd->name, "on", elapsed_ns); in _genpd_power_on()
532 raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_ON, NULL); in _genpd_power_on()
535 raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_OFF, in _genpd_power_on()
542 unsigned int state_idx = genpd->state_idx; in _genpd_power_off()
547 /* Notify consumers that we are about to power off. */ in _genpd_power_off()
548 ret = raw_notifier_call_chain_robust(&genpd->power_notifiers, in _genpd_power_off()
555 if (!genpd->power_off) in _genpd_power_off()
559 ret = genpd->power_off(genpd); in _genpd_power_off()
567 ret = genpd->power_off(genpd); in _genpd_power_off()
572 if (elapsed_ns <= genpd->states[state_idx].power_off_latency_ns) in _genpd_power_off()
575 genpd->states[state_idx].power_off_latency_ns = elapsed_ns; in _genpd_power_off()
576 genpd->max_off_time_changed = true; in _genpd_power_off()
577 pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n", in _genpd_power_off()
578 genpd->name, "off", elapsed_ns); in _genpd_power_off()
581 raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_OFF, in _genpd_power_off()
585 raw_notifier_call_chain(&genpd->power_notifiers, GENPD_NOTIFY_ON, NULL); in _genpd_power_off()
590 * genpd_queue_power_off_work - Queue up the execution of genpd_power_off().
591 * @genpd: PM domain to power off.
598 queue_work(pm_wq, &genpd->power_off_work); in genpd_queue_power_off_work()
602 * genpd_power_off - Remove power from a given PM domain.
603 * @genpd: PM domain to power down.
604 * @one_dev_on: If invoked from genpd's ->runtime_suspend|resume() callback, the
607 * be RPM_SUSPENDED, while it tries to power off the PM domain.
611 * have been powered down, remove power from @genpd.
622 * Do not try to power off the domain in the following situations: in genpd_power_off()
623 * (1) The domain is already in the "power off" state. in genpd_power_off()
626 if (!genpd_status_on(genpd) || genpd->prepared_count > 0) in genpd_power_off()
630 * Abort power off for the PM domain in the following situations: in genpd_power_off()
631 * (1) The domain is configured as always on. in genpd_power_off()
632 * (2) When the domain has a subdomain being powered on. in genpd_power_off()
636 atomic_read(&genpd->sd_count) > 0) in genpd_power_off()
637 return -EBUSY; in genpd_power_off()
639 list_for_each_entry(pdd, &genpd->dev_list, list_node) { in genpd_power_off()
642 stat = dev_pm_qos_flags(pdd->dev, PM_QOS_FLAG_NO_POWER_OFF); in genpd_power_off()
644 return -EBUSY; in genpd_power_off()
647 * Do not allow PM domain to be powered off, when an IRQ safe in genpd_power_off()
648 * device is part of a non-IRQ safe domain. in genpd_power_off()
650 if (!pm_runtime_suspended(pdd->dev) || in genpd_power_off()
651 irq_safe_dev_in_no_sleep_domain(pdd->dev, genpd)) in genpd_power_off()
656 return -EBUSY; in genpd_power_off()
658 if (genpd->gov && genpd->gov->power_down_ok) { in genpd_power_off()
659 if (!genpd->gov->power_down_ok(&genpd->domain)) in genpd_power_off()
660 return -EAGAIN; in genpd_power_off()
664 if (!genpd->gov) in genpd_power_off()
665 genpd->state_idx = 0; in genpd_power_off()
667 /* Don't power off, if a child domain is waiting to power on. */ in genpd_power_off()
668 if (atomic_read(&genpd->sd_count) > 0) in genpd_power_off()
669 return -EBUSY; in genpd_power_off()
673 genpd->states[genpd->state_idx].rejected++; in genpd_power_off()
677 genpd->status = GENPD_STATE_OFF; in genpd_power_off()
679 genpd->states[genpd->state_idx].usage++; in genpd_power_off()
681 list_for_each_entry(link, &genpd->child_links, child_node) { in genpd_power_off()
682 genpd_sd_counter_dec(link->parent); in genpd_power_off()
683 genpd_lock_nested(link->parent, depth + 1); in genpd_power_off()
684 genpd_power_off(link->parent, false, depth + 1); in genpd_power_off()
685 genpd_unlock(link->parent); in genpd_power_off()
692 * genpd_power_on - Restore power to a given PM domain and its parents.
693 * @genpd: PM domain to power up.
696 * Restore power to @genpd and all of its parents so that it is possible to
712 list_for_each_entry(link, &genpd->child_links, child_node) { in genpd_power_on()
713 struct generic_pm_domain *parent = link->parent; in genpd_power_on()
731 genpd->status = GENPD_STATE_ON; in genpd_power_on()
738 &genpd->child_links, in genpd_power_on()
740 genpd_sd_counter_dec(link->parent); in genpd_power_on()
741 genpd_lock_nested(link->parent, depth + 1); in genpd_power_on()
742 genpd_power_off(link->parent, false, depth + 1); in genpd_power_on()
743 genpd_unlock(link->parent); in genpd_power_on()
763 dev = gpd_data->base.dev; in genpd_dev_pm_qos_notifier()
769 spin_lock_irq(&dev->power.lock); in genpd_dev_pm_qos_notifier()
771 pdd = dev->power.subsys_data ? in genpd_dev_pm_qos_notifier()
772 dev->power.subsys_data->domain_data : NULL; in genpd_dev_pm_qos_notifier()
774 to_gpd_data(pdd)->td.constraint_changed = true; in genpd_dev_pm_qos_notifier()
777 genpd = ERR_PTR(-ENODATA); in genpd_dev_pm_qos_notifier()
780 spin_unlock_irq(&dev->power.lock); in genpd_dev_pm_qos_notifier()
784 genpd->max_off_time_changed = true; in genpd_dev_pm_qos_notifier()
788 dev = dev->parent; in genpd_dev_pm_qos_notifier()
789 if (!dev || dev->power.ignore_children) in genpd_dev_pm_qos_notifier()
797 * genpd_power_off_work_fn - Power off PM domain whose subdomain count is 0.
812 * __genpd_runtime_suspend - walk the hierarchy of ->runtime_suspend() callbacks
819 if (dev->type && dev->type->pm) in __genpd_runtime_suspend()
820 cb = dev->type->pm->runtime_suspend; in __genpd_runtime_suspend()
821 else if (dev->class && dev->class->pm) in __genpd_runtime_suspend()
822 cb = dev->class->pm->runtime_suspend; in __genpd_runtime_suspend()
823 else if (dev->bus && dev->bus->pm) in __genpd_runtime_suspend()
824 cb = dev->bus->pm->runtime_suspend; in __genpd_runtime_suspend()
828 if (!cb && dev->driver && dev->driver->pm) in __genpd_runtime_suspend()
829 cb = dev->driver->pm->runtime_suspend; in __genpd_runtime_suspend()
835 * __genpd_runtime_resume - walk the hierarchy of ->runtime_resume() callbacks
842 if (dev->type && dev->type->pm) in __genpd_runtime_resume()
843 cb = dev->type->pm->runtime_resume; in __genpd_runtime_resume()
844 else if (dev->class && dev->class->pm) in __genpd_runtime_resume()
845 cb = dev->class->pm->runtime_resume; in __genpd_runtime_resume()
846 else if (dev->bus && dev->bus->pm) in __genpd_runtime_resume()
847 cb = dev->bus->pm->runtime_resume; in __genpd_runtime_resume()
851 if (!cb && dev->driver && dev->driver->pm) in __genpd_runtime_resume()
852 cb = dev->driver->pm->runtime_resume; in __genpd_runtime_resume()
858 * genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.
862 * pm_domain field points to the domain member of an object of type
863 * struct generic_pm_domain representing a PM domain consisting of I/O devices.
870 struct gpd_timing_data *td = &gpd_data->td; in genpd_runtime_suspend()
880 return -EINVAL; in genpd_runtime_suspend()
883 * A runtime PM centric subsystem/driver may re-use the runtime PM in genpd_runtime_suspend()
888 suspend_ok = genpd->gov ? genpd->gov->suspend_ok : NULL; in genpd_runtime_suspend()
890 return -EBUSY; in genpd_runtime_suspend()
910 if (elapsed_ns > td->suspend_latency_ns) { in genpd_runtime_suspend()
911 td->suspend_latency_ns = elapsed_ns; in genpd_runtime_suspend()
914 genpd->max_off_time_changed = true; in genpd_runtime_suspend()
915 td->constraint_changed = true; in genpd_runtime_suspend()
920 * If power.irq_safe is set, this routine may be run with in genpd_runtime_suspend()
921 * IRQs disabled, so suspend only if the PM domain also is irq_safe. in genpd_runtime_suspend()
927 gpd_data->rpm_pstate = genpd_drop_performance_state(dev); in genpd_runtime_suspend()
935 * genpd_runtime_resume - Resume a device belonging to I/O PM domain.
939 * pm_domain field points to the domain member of an object of type
940 * struct generic_pm_domain representing a PM domain consisting of I/O devices.
946 struct gpd_timing_data *td = &gpd_data->td; in genpd_runtime_resume()
957 return -EINVAL; in genpd_runtime_resume()
960 * As we don't power off a non IRQ safe domain, which holds in genpd_runtime_resume()
961 * an IRQ safe device, we don't need to restore power to it. in genpd_runtime_resume()
971 genpd_restore_performance_state(dev, gpd_data->rpm_pstate); in genpd_runtime_resume()
994 if (elapsed_ns > td->resume_latency_ns) { in genpd_runtime_resume()
995 td->resume_latency_ns = elapsed_ns; in genpd_runtime_resume()
998 genpd->max_off_time_changed = true; in genpd_runtime_resume()
999 td->constraint_changed = true; in genpd_runtime_resume()
1010 gpd_data->rpm_pstate = genpd_drop_performance_state(dev); in genpd_runtime_resume()
1027 * genpd_power_off_unused - Power off all PM domains with no devices in use.
1034 pr_warn("genpd: Not disabling unused power domains\n"); in genpd_power_off_unused()
1052 * genpd_sync_power_off - Synchronously power off a PM domain and its parents.
1053 * @genpd: PM domain to power off, if possible.
1057 * Check if the given PM domain can be powered off (during system suspend or
1060 * This function is only called in "noirq" and "syscore" stages of system power
1072 if (genpd->suspended_count != genpd->device_count in genpd_sync_power_off()
1073 || atomic_read(&genpd->sd_count) > 0) in genpd_sync_power_off()
1077 genpd->state_idx = genpd->state_count - 1; in genpd_sync_power_off()
1081 genpd->status = GENPD_STATE_OFF; in genpd_sync_power_off()
1083 list_for_each_entry(link, &genpd->child_links, child_node) { in genpd_sync_power_off()
1084 genpd_sd_counter_dec(link->parent); in genpd_sync_power_off()
1087 genpd_lock_nested(link->parent, depth + 1); in genpd_sync_power_off()
1089 genpd_sync_power_off(link->parent, use_lock, depth + 1); in genpd_sync_power_off()
1092 genpd_unlock(link->parent); in genpd_sync_power_off()
1097 * genpd_sync_power_on - Synchronously power on a PM domain and its parents.
1098 * @genpd: PM domain to power on.
1102 * This function is only called in "noirq" and "syscore" stages of system power
1114 list_for_each_entry(link, &genpd->child_links, child_node) { in genpd_sync_power_on()
1115 genpd_sd_counter_inc(link->parent); in genpd_sync_power_on()
1118 genpd_lock_nested(link->parent, depth + 1); in genpd_sync_power_on()
1120 genpd_sync_power_on(link->parent, use_lock, depth + 1); in genpd_sync_power_on()
1123 genpd_unlock(link->parent); in genpd_sync_power_on()
1127 genpd->status = GENPD_STATE_ON; in genpd_sync_power_on()
1131 * genpd_prepare - Start power transition of a device in a PM domain.
1134 * Start a power transition of a device (during a system-wide power transition)
1135 * under the assumption that its pm_domain field points to the domain member of
1136 * an object of type struct generic_pm_domain representing a PM domain
1148 return -EINVAL; in genpd_prepare()
1152 if (genpd->prepared_count++ == 0) in genpd_prepare()
1153 genpd->suspended_count = 0; in genpd_prepare()
1161 genpd->prepared_count--; in genpd_prepare()
1171 * genpd_finish_suspend - Completion of suspend or hibernation of device in an
1172 * I/O pm domain.
1176 * Stop the device and remove power from the domain if all devices in it have
1186 return -EINVAL; in genpd_finish_suspend()
1198 if (genpd->dev_ops.stop && genpd->dev_ops.start && in genpd_finish_suspend()
1211 genpd->suspended_count++; in genpd_finish_suspend()
1219 * genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
1222 * Stop the device and remove power from the domain if all devices in it have
1233 * genpd_resume_noirq - Start of resume of device in an I/O PM domain.
1236 * Restore power to the device's PM domain, if necessary, and start the device.
1247 return -EINVAL; in genpd_resume_noirq()
1254 genpd->suspended_count--; in genpd_resume_noirq()
1257 if (genpd->dev_ops.stop && genpd->dev_ops.start && in genpd_resume_noirq()
1268 * genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
1272 * pm_domain field points to the domain member of an object of type
1273 * struct generic_pm_domain representing a power domain consisting of I/O
1285 return -EINVAL; in genpd_freeze_noirq()
1291 if (genpd->dev_ops.stop && genpd->dev_ops.start && in genpd_freeze_noirq()
1299 * genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
1302 * Start the device, unless power has been removed from the domain already
1314 return -EINVAL; in genpd_thaw_noirq()
1316 if (genpd->dev_ops.stop && genpd->dev_ops.start && in genpd_thaw_noirq()
1327 * genpd_poweroff_noirq - Completion of hibernation of device in an
1328 * I/O PM domain.
1331 * Stop the device and remove power from the domain if all devices in it have
1342 * genpd_restore_noirq - Start of restore of device in an I/O PM domain.
1345 * Make sure the domain will be in the same power state as before the
1357 return -EINVAL; in genpd_restore_noirq()
1361 * first time for the given domain in the present cycle. in genpd_restore_noirq()
1364 if (genpd->suspended_count++ == 0) { in genpd_restore_noirq()
1366 * The boot kernel might put the domain into arbitrary state, in genpd_restore_noirq()
1368 * so that it tries to power it on in case it was really off. in genpd_restore_noirq()
1370 genpd->status = GENPD_STATE_OFF; in genpd_restore_noirq()
1376 if (genpd->dev_ops.stop && genpd->dev_ops.start && in genpd_restore_noirq()
1387 * genpd_complete - Complete power transition of a device in a power domain.
1390 * Complete a power transition of a device (during a system-wide power
1392 * domain member of an object of type struct generic_pm_domain representing
1393 * a power domain consisting of I/O devices.
1409 genpd->prepared_count--; in genpd_complete()
1410 if (!genpd->prepared_count) in genpd_complete()
1431 genpd->suspended_count++; in genpd_switch_state()
1435 genpd->suspended_count--; in genpd_switch_state()
1443 * dev_pm_genpd_suspend - Synchronously try to suspend the genpd for @dev
1448 * suspend-to-idle to suspend a corresponding CPU device that is attached to a
1458 * dev_pm_genpd_resume - Synchronously try to resume the genpd for @dev
1462 * during the syscore resume phase. It may also be called during suspend-to-idle
1495 ret = -ENOMEM; in genpd_alloc_dev_data()
1499 gpd_data->base.dev = dev; in genpd_alloc_dev_data()
1500 gpd_data->td.constraint_changed = true; in genpd_alloc_dev_data()
1501 gpd_data->td.effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS; in genpd_alloc_dev_data()
1502 gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier; in genpd_alloc_dev_data()
1503 gpd_data->next_wakeup = KTIME_MAX; in genpd_alloc_dev_data()
1505 spin_lock_irq(&dev->power.lock); in genpd_alloc_dev_data()
1507 if (dev->power.subsys_data->domain_data) { in genpd_alloc_dev_data()
1508 ret = -EINVAL; in genpd_alloc_dev_data()
1512 dev->power.subsys_data->domain_data = &gpd_data->base; in genpd_alloc_dev_data()
1514 spin_unlock_irq(&dev->power.lock); in genpd_alloc_dev_data()
1519 spin_unlock_irq(&dev->power.lock); in genpd_alloc_dev_data()
1529 spin_lock_irq(&dev->power.lock); in genpd_free_dev_data()
1531 dev->power.subsys_data->domain_data = NULL; in genpd_free_dev_data()
1533 spin_unlock_irq(&dev->power.lock); in genpd_free_dev_data()
1547 list_for_each_entry(link, &genpd->child_links, child_node) { in genpd_update_cpumask()
1548 struct generic_pm_domain *parent = link->parent; in genpd_update_cpumask()
1556 cpumask_set_cpu(cpu, genpd->cpus); in genpd_update_cpumask()
1558 cpumask_clear_cpu(cpu, genpd->cpus); in genpd_update_cpumask()
1578 return -1; in genpd_get_cpu()
1585 return -1; in genpd_get_cpu()
1597 return -EINVAL; in genpd_add_device()
1603 gpd_data->cpu = genpd_get_cpu(genpd, base_dev); in genpd_add_device()
1605 ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0; in genpd_add_device()
1611 genpd_set_cpumask(genpd, gpd_data->cpu); in genpd_add_device()
1612 dev_pm_domain_set(dev, &genpd->domain); in genpd_add_device()
1614 genpd->device_count++; in genpd_add_device()
1615 genpd->max_off_time_changed = true; in genpd_add_device()
1617 list_add_tail(&gpd_data->base.list_node, &genpd->dev_list); in genpd_add_device()
1624 dev_pm_qos_add_notifier(dev, &gpd_data->nb, in genpd_add_device()
1631 * pm_genpd_add_device - Add a device to an I/O PM domain.
1632 * @genpd: PM domain to add the device to.
1656 pdd = dev->power.subsys_data->domain_data; in genpd_remove_device()
1658 dev_pm_qos_remove_notifier(dev, &gpd_data->nb, in genpd_remove_device()
1663 if (genpd->prepared_count > 0) { in genpd_remove_device()
1664 ret = -EAGAIN; in genpd_remove_device()
1668 genpd->device_count--; in genpd_remove_device()
1669 genpd->max_off_time_changed = true; in genpd_remove_device()
1671 genpd_clear_cpumask(genpd, gpd_data->cpu); in genpd_remove_device()
1674 list_del_init(&pdd->list_node); in genpd_remove_device()
1678 if (genpd->detach_dev) in genpd_remove_device()
1679 genpd->detach_dev(genpd, dev); in genpd_remove_device()
1687 dev_pm_qos_add_notifier(dev, &gpd_data->nb, DEV_PM_QOS_RESUME_LATENCY); in genpd_remove_device()
1693 * pm_genpd_remove_device - Remove a device from an I/O PM domain.
1701 return -EINVAL; in pm_genpd_remove_device()
1708 * dev_pm_genpd_add_notifier - Add a genpd power on/off notifier for @dev
1713 * Users may call this function to add a genpd power on/off notifier for an
1715 * sent when genpd is powering on/off the PM domain.
1730 return -ENODEV; in dev_pm_genpd_add_notifier()
1732 if (WARN_ON(!dev->power.subsys_data || in dev_pm_genpd_add_notifier()
1733 !dev->power.subsys_data->domain_data)) in dev_pm_genpd_add_notifier()
1734 return -EINVAL; in dev_pm_genpd_add_notifier()
1736 gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); in dev_pm_genpd_add_notifier()
1737 if (gpd_data->power_nb) in dev_pm_genpd_add_notifier()
1738 return -EEXIST; in dev_pm_genpd_add_notifier()
1741 ret = raw_notifier_chain_register(&genpd->power_notifiers, nb); in dev_pm_genpd_add_notifier()
1745 dev_warn(dev, "failed to add notifier for PM domain %s\n", in dev_pm_genpd_add_notifier()
1746 genpd->name); in dev_pm_genpd_add_notifier()
1750 gpd_data->power_nb = nb; in dev_pm_genpd_add_notifier()
1756 * dev_pm_genpd_remove_notifier - Remove a genpd power on/off notifier for @dev
1760 * Users may call this function to remove a genpd power on/off notifier for an
1776 return -ENODEV; in dev_pm_genpd_remove_notifier()
1778 if (WARN_ON(!dev->power.subsys_data || in dev_pm_genpd_remove_notifier()
1779 !dev->power.subsys_data->domain_data)) in dev_pm_genpd_remove_notifier()
1780 return -EINVAL; in dev_pm_genpd_remove_notifier()
1782 gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); in dev_pm_genpd_remove_notifier()
1783 if (!gpd_data->power_nb) in dev_pm_genpd_remove_notifier()
1784 return -ENODEV; in dev_pm_genpd_remove_notifier()
1787 ret = raw_notifier_chain_unregister(&genpd->power_notifiers, in dev_pm_genpd_remove_notifier()
1788 gpd_data->power_nb); in dev_pm_genpd_remove_notifier()
1792 dev_warn(dev, "failed to remove notifier for PM domain %s\n", in dev_pm_genpd_remove_notifier()
1793 genpd->name); in dev_pm_genpd_remove_notifier()
1797 gpd_data->power_nb = NULL; in dev_pm_genpd_remove_notifier()
1810 return -EINVAL; in genpd_add_subdomain()
1813 * If the domain can be powered on/off in an IRQ safe in genpd_add_subdomain()
1819 genpd->name, subdomain->name); in genpd_add_subdomain()
1820 return -EINVAL; in genpd_add_subdomain()
1825 return -ENOMEM; in genpd_add_subdomain()
1831 ret = -EINVAL; in genpd_add_subdomain()
1835 list_for_each_entry(itr, &genpd->parent_links, parent_node) { in genpd_add_subdomain()
1836 if (itr->child == subdomain && itr->parent == genpd) { in genpd_add_subdomain()
1837 ret = -EINVAL; in genpd_add_subdomain()
1842 link->parent = genpd; in genpd_add_subdomain()
1843 list_add_tail(&link->parent_node, &genpd->parent_links); in genpd_add_subdomain()
1844 link->child = subdomain; in genpd_add_subdomain()
1845 list_add_tail(&link->child_node, &subdomain->child_links); in genpd_add_subdomain()
1858 * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain.
1859 * @genpd: Leader PM domain to add the subdomain to.
1876 * pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
1877 * @genpd: Leader PM domain to remove the subdomain from.
1884 int ret = -EINVAL; in pm_genpd_remove_subdomain()
1887 return -EINVAL; in pm_genpd_remove_subdomain()
1892 if (!list_empty(&subdomain->parent_links) || subdomain->device_count) { in pm_genpd_remove_subdomain()
1894 genpd->name, subdomain->name); in pm_genpd_remove_subdomain()
1895 ret = -EBUSY; in pm_genpd_remove_subdomain()
1899 list_for_each_entry_safe(link, l, &genpd->parent_links, parent_node) { in pm_genpd_remove_subdomain()
1900 if (link->child != subdomain) in pm_genpd_remove_subdomain()
1903 list_del(&link->parent_node); in pm_genpd_remove_subdomain()
1904 list_del(&link->child_node); in pm_genpd_remove_subdomain()
1933 return -ENOMEM; in genpd_set_default_power_state()
1935 genpd->states = state; in genpd_set_default_power_state()
1936 genpd->state_count = 1; in genpd_set_default_power_state()
1937 genpd->free_states = genpd_free_default_power_state; in genpd_set_default_power_state()
1944 if (genpd->flags & GENPD_FLAG_IRQ_SAFE) { in genpd_lock_init()
1945 spin_lock_init(&genpd->slock); in genpd_lock_init()
1946 genpd->lock_ops = &genpd_spin_ops; in genpd_lock_init()
1948 mutex_init(&genpd->mlock); in genpd_lock_init()
1949 genpd->lock_ops = &genpd_mtx_ops; in genpd_lock_init()
1954 * pm_genpd_init - Initialize a generic I/O PM domain object.
1955 * @genpd: PM domain object to initialize.
1956 * @gov: PM domain governor to associate with the domain (may be NULL).
1957 * @is_off: Initial value of the domain's power_is_off field.
1967 return -EINVAL; in pm_genpd_init()
1969 INIT_LIST_HEAD(&genpd->parent_links); in pm_genpd_init()
1970 INIT_LIST_HEAD(&genpd->child_links); in pm_genpd_init()
1971 INIT_LIST_HEAD(&genpd->dev_list); in pm_genpd_init()
1972 RAW_INIT_NOTIFIER_HEAD(&genpd->power_notifiers); in pm_genpd_init()
1974 genpd->gov = gov; in pm_genpd_init()
1975 INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); in pm_genpd_init()
1976 atomic_set(&genpd->sd_count, 0); in pm_genpd_init()
1977 genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; in pm_genpd_init()
1978 genpd->device_count = 0; in pm_genpd_init()
1979 genpd->max_off_time_ns = -1; in pm_genpd_init()
1980 genpd->max_off_time_changed = true; in pm_genpd_init()
1981 genpd->provider = NULL; in pm_genpd_init()
1982 genpd->has_provider = false; in pm_genpd_init()
1983 genpd->accounting_time = ktime_get(); in pm_genpd_init()
1984 genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; in pm_genpd_init()
1985 genpd->domain.ops.runtime_resume = genpd_runtime_resume; in pm_genpd_init()
1986 genpd->domain.ops.prepare = genpd_prepare; in pm_genpd_init()
1987 genpd->domain.ops.suspend_noirq = genpd_suspend_noirq; in pm_genpd_init()
1988 genpd->domain.ops.resume_noirq = genpd_resume_noirq; in pm_genpd_init()
1989 genpd->domain.ops.freeze_noirq = genpd_freeze_noirq; in pm_genpd_init()
1990 genpd->domain.ops.thaw_noirq = genpd_thaw_noirq; in pm_genpd_init()
1991 genpd->domain.ops.poweroff_noirq = genpd_poweroff_noirq; in pm_genpd_init()
1992 genpd->domain.ops.restore_noirq = genpd_restore_noirq; in pm_genpd_init()
1993 genpd->domain.ops.complete = genpd_complete; in pm_genpd_init()
1994 genpd->domain.start = genpd_dev_pm_start; in pm_genpd_init()
1996 if (genpd->flags & GENPD_FLAG_PM_CLK) { in pm_genpd_init()
1997 genpd->dev_ops.stop = pm_clk_suspend; in pm_genpd_init()
1998 genpd->dev_ops.start = pm_clk_resume; in pm_genpd_init()
2001 /* Always-on domains must be powered on at initialization. */ in pm_genpd_init()
2004 return -EINVAL; in pm_genpd_init()
2007 !zalloc_cpumask_var(&genpd->cpus, GFP_KERNEL)) in pm_genpd_init()
2008 return -ENOMEM; in pm_genpd_init()
2011 if (genpd->state_count == 0) { in pm_genpd_init()
2015 free_cpumask_var(genpd->cpus); in pm_genpd_init()
2018 } else if (!gov && genpd->state_count > 1) { in pm_genpd_init()
2019 pr_warn("%s: no governor for states\n", genpd->name); in pm_genpd_init()
2022 device_initialize(&genpd->dev); in pm_genpd_init()
2023 dev_set_name(&genpd->dev, "%s", genpd->name); in pm_genpd_init()
2026 list_add(&genpd->gpd_list_node, &gpd_list); in pm_genpd_init()
2039 return -EINVAL; in genpd_remove()
2043 if (genpd->has_provider) { in genpd_remove()
2045 pr_err("Provider present, unable to remove %s\n", genpd->name); in genpd_remove()
2046 return -EBUSY; in genpd_remove()
2049 if (!list_empty(&genpd->parent_links) || genpd->device_count) { in genpd_remove()
2051 pr_err("%s: unable to remove %s\n", __func__, genpd->name); in genpd_remove()
2052 return -EBUSY; in genpd_remove()
2055 list_for_each_entry_safe(link, l, &genpd->child_links, child_node) { in genpd_remove()
2056 list_del(&link->parent_node); in genpd_remove()
2057 list_del(&link->child_node); in genpd_remove()
2062 list_del(&genpd->gpd_list_node); in genpd_remove()
2064 cancel_work_sync(&genpd->power_off_work); in genpd_remove()
2066 free_cpumask_var(genpd->cpus); in genpd_remove()
2067 if (genpd->free_states) in genpd_remove()
2068 genpd->free_states(genpd->states, genpd->state_count); in genpd_remove()
2070 pr_debug("%s: removed %s\n", __func__, genpd->name); in genpd_remove()
2076 * pm_genpd_remove - Remove a generic I/O PM domain
2077 * @genpd: Pointer to PM domain that is to be removed.
2079 * To remove the PM domain, this function:
2080 * - Removes the PM domain as a subdomain to any parent domains,
2082 * - Removes the PM domain from the list of registered PM domains.
2084 * The PM domain will only be removed, if the associated provider has
2085 * been removed, it is not a parent to any other PM domain and has no
2103 * Device Tree based PM domain providers.
2105 * The code below implements generic device tree based PM domain providers that
2109 * devices to these domains is supposed to register a PM domain provider, which
2110 * maps a PM domain specifier retrieved from the device tree to a PM domain.
2113 * - genpd_xlate_simple() for 1:1 device tree node to PM domain mapping.
2114 * - genpd_xlate_onecell() for mapping of multiple PM domains per node by
2119 * struct of_genpd_provider - PM domain provider registration structure
2120 * @link: Entry in global list of PM domain providers
2121 * @node: Pointer to device tree node of PM domain provider
2122 * @xlate: Provider-specific xlate callback mapping a set of specifier cells
2123 * into a PM domain.
2133 /* List of registered PM domain providers. */
2139 * genpd_xlate_simple() - Xlate function for direct node-domain mapping
2140 * @genpdspec: OF phandle args to map into a PM domain
2141 * @data: xlate function private data - pointer to struct generic_pm_domain
2155 * genpd_xlate_onecell() - Xlate function using a single index.
2156 * @genpdspec: OF phandle args to map into a PM domain
2157 * @data: xlate function private data - pointer to struct genpd_onecell_data
2159 * This is a generic xlate function that can be used to model simple PM domain
2169 unsigned int idx = genpdspec->args[0]; in genpd_xlate_onecell()
2171 if (genpdspec->args_count != 1) in genpd_xlate_onecell()
2172 return ERR_PTR(-EINVAL); in genpd_xlate_onecell()
2174 if (idx >= genpd_data->num_domains) { in genpd_xlate_onecell()
2175 pr_err("%s: invalid domain index %u\n", __func__, idx); in genpd_xlate_onecell()
2176 return ERR_PTR(-EINVAL); in genpd_xlate_onecell()
2179 if (!genpd_data->domains[idx]) in genpd_xlate_onecell()
2180 return ERR_PTR(-ENOENT); in genpd_xlate_onecell()
2182 return genpd_data->domains[idx]; in genpd_xlate_onecell()
2186 * genpd_add_provider() - Register a PM domain provider for a node
2187 * @np: Device node pointer associated with the PM domain provider.
2188 * @xlate: Callback for decoding PM domain from phandle arguments.
2198 return -ENOMEM; in genpd_add_provider()
2200 cp->node = of_node_get(np); in genpd_add_provider()
2201 cp->data = data; in genpd_add_provider()
2202 cp->xlate = xlate; in genpd_add_provider()
2203 fwnode_dev_initialized(&np->fwnode, true); in genpd_add_provider()
2206 list_add(&cp->link, &of_genpd_providers); in genpd_add_provider()
2208 pr_debug("Added domain provider from %pOF\n", np); in genpd_add_provider()
2231 * of_genpd_add_provider_simple() - Register a simple PM domain provider
2232 * @np: Device node pointer associated with the PM domain provider.
2233 * @genpd: Pointer to PM domain associated with the PM domain provider.
2241 return -EINVAL; in of_genpd_add_provider_simple()
2244 return -EINVAL; in of_genpd_add_provider_simple()
2246 genpd->dev.of_node = np; in of_genpd_add_provider_simple()
2249 if (genpd->set_performance_state) { in of_genpd_add_provider_simple()
2250 ret = dev_pm_opp_of_add_table(&genpd->dev); in of_genpd_add_provider_simple()
2252 if (ret != -EPROBE_DEFER) in of_genpd_add_provider_simple()
2253 dev_err(&genpd->dev, "Failed to add OPP table: %d\n", in of_genpd_add_provider_simple()
2262 genpd->opp_table = dev_pm_opp_get_opp_table(&genpd->dev); in of_genpd_add_provider_simple()
2263 WARN_ON(IS_ERR(genpd->opp_table)); in of_genpd_add_provider_simple()
2268 if (genpd->set_performance_state) { in of_genpd_add_provider_simple()
2269 dev_pm_opp_put_opp_table(genpd->opp_table); in of_genpd_add_provider_simple()
2270 dev_pm_opp_of_remove_table(&genpd->dev); in of_genpd_add_provider_simple()
2276 genpd->provider = &np->fwnode; in of_genpd_add_provider_simple()
2277 genpd->has_provider = true; in of_genpd_add_provider_simple()
2284 * of_genpd_add_provider_onecell() - Register a onecell PM domain provider
2285 * @np: Device node pointer associated with the PM domain provider.
2286 * @data: Pointer to the data associated with the PM domain provider.
2293 int ret = -EINVAL; in of_genpd_add_provider_onecell()
2296 return -EINVAL; in of_genpd_add_provider_onecell()
2298 if (!data->xlate) in of_genpd_add_provider_onecell()
2299 data->xlate = genpd_xlate_onecell; in of_genpd_add_provider_onecell()
2301 for (i = 0; i < data->num_domains; i++) { in of_genpd_add_provider_onecell()
2302 genpd = data->domains[i]; in of_genpd_add_provider_onecell()
2309 genpd->dev.of_node = np; in of_genpd_add_provider_onecell()
2312 if (genpd->set_performance_state) { in of_genpd_add_provider_onecell()
2313 ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i); in of_genpd_add_provider_onecell()
2315 if (ret != -EPROBE_DEFER) in of_genpd_add_provider_onecell()
2316 dev_err(&genpd->dev, "Failed to add OPP table for index %d: %d\n", in of_genpd_add_provider_onecell()
2325 genpd->opp_table = dev_pm_opp_get_opp_table(&genpd->dev); in of_genpd_add_provider_onecell()
2326 WARN_ON(IS_ERR(genpd->opp_table)); in of_genpd_add_provider_onecell()
2329 genpd->provider = &np->fwnode; in of_genpd_add_provider_onecell()
2330 genpd->has_provider = true; in of_genpd_add_provider_onecell()
2333 ret = genpd_add_provider(np, data->xlate, data); in of_genpd_add_provider_onecell()
2340 while (i--) { in of_genpd_add_provider_onecell()
2341 genpd = data->domains[i]; in of_genpd_add_provider_onecell()
2346 genpd->provider = NULL; in of_genpd_add_provider_onecell()
2347 genpd->has_provider = false; in of_genpd_add_provider_onecell()
2349 if (genpd->set_performance_state) { in of_genpd_add_provider_onecell()
2350 dev_pm_opp_put_opp_table(genpd->opp_table); in of_genpd_add_provider_onecell()
2351 dev_pm_opp_of_remove_table(&genpd->dev); in of_genpd_add_provider_onecell()
2360 * of_genpd_del_provider() - Remove a previously registered PM domain provider
2361 * @np: Device node pointer associated with the PM domain provider
2371 if (cp->node == np) { in of_genpd_del_provider()
2373 * For each PM domain associated with the in of_genpd_del_provider()
2375 * so that the PM domain can be safely removed. in of_genpd_del_provider()
2378 if (gpd->provider == &np->fwnode) { in of_genpd_del_provider()
2379 gpd->has_provider = false; in of_genpd_del_provider()
2381 if (!gpd->set_performance_state) in of_genpd_del_provider()
2384 dev_pm_opp_put_opp_table(gpd->opp_table); in of_genpd_del_provider()
2385 dev_pm_opp_of_remove_table(&gpd->dev); in of_genpd_del_provider()
2389 fwnode_dev_initialized(&cp->node->fwnode, false); in of_genpd_del_provider()
2390 list_del(&cp->link); in of_genpd_del_provider()
2391 of_node_put(cp->node); in of_genpd_del_provider()
2402 * genpd_get_from_provider() - Look-up PM domain
2403 * @genpdspec: OF phandle args to use for look-up
2405 * Looks for a PM domain provider under the node specified by @genpdspec and if
2407 * domain.
2415 struct generic_pm_domain *genpd = ERR_PTR(-ENOENT); in genpd_get_from_provider()
2419 return ERR_PTR(-EINVAL); in genpd_get_from_provider()
2425 if (provider->node == genpdspec->np) in genpd_get_from_provider()
2426 genpd = provider->xlate(genpdspec, provider->data); in genpd_get_from_provider()
2437 * of_genpd_add_device() - Add a device to an I/O PM domain
2438 * @genpdspec: OF phandle args to use for look-up PM domain
2441 * Looks-up an I/O PM domain based upon phandle args provided and adds
2442 * the device to the PM domain. Returns a negative error code on failure.
2467 * of_genpd_add_subdomain - Add a subdomain to an I/O PM domain.
2468 * @parent_spec: OF phandle args to use for parent PM domain look-up
2469 * @subdomain_spec: OF phandle args to use for subdomain look-up
2471 * Looks-up a parent PM domain and subdomain based upon phandle args
2472 * provided and adds the subdomain to the parent PM domain. Returns a
2500 return ret == -ENOENT ? -EPROBE_DEFER : ret; in of_genpd_add_subdomain()
2505 * of_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
2506 * @parent_spec: OF phandle args to use for parent PM domain look-up
2507 * @subdomain_spec: OF phandle args to use for subdomain look-up
2509 * Looks-up a parent PM domain and subdomain based upon phandle args
2510 * provided and removes the subdomain from the parent PM domain. Returns a
2543 * of_genpd_remove_last - Remove the last PM domain registered for a provider
2546 * Find the last PM domain that was added by a particular provider and
2547 * remove this PM domain from the list of PM domains. The provider is
2549 * domain will only be removed, if the provider associated with domain
2557 struct generic_pm_domain *gpd, *tmp, *genpd = ERR_PTR(-ENOENT); in of_genpd_remove_last()
2561 return ERR_PTR(-EINVAL); in of_genpd_remove_last()
2565 if (gpd->provider == &np->fwnode) { in of_genpd_remove_last()
2579 of_node_put(dev->of_node); in genpd_release_dev()
2588 * genpd_dev_pm_detach - Detach a device from its PM domain.
2592 * Try to locate a corresponding generic PM domain, which the device was
2605 dev_dbg(dev, "removing from PM domain %s\n", pd->name); in genpd_dev_pm_detach()
2608 if (dev_gpd_data(dev)->default_pstate) { in genpd_dev_pm_detach()
2610 dev_gpd_data(dev)->default_pstate = 0; in genpd_dev_pm_detach()
2615 if (ret != -EAGAIN) in genpd_dev_pm_detach()
2623 dev_err(dev, "failed to remove from PM domain %s: %d", in genpd_dev_pm_detach()
2624 pd->name, ret); in genpd_dev_pm_detach()
2628 /* Check if PM domain can be powered off after removing this device. */ in genpd_dev_pm_detach()
2632 if (dev->bus == &genpd_bus_type) in genpd_dev_pm_detach()
2655 ret = of_parse_phandle_with_args(dev->of_node, "power-domains", in __genpd_dev_pm_attach()
2656 "#power-domain-cells", index, &pd_args); in __genpd_dev_pm_attach()
2665 dev_dbg(dev, "%s() failed to find PM domain: %ld\n", in __genpd_dev_pm_attach()
2670 dev_dbg(dev, "adding to PM domain %s\n", pd->name); in __genpd_dev_pm_attach()
2676 if (ret != -EPROBE_DEFER) in __genpd_dev_pm_attach()
2677 dev_err(dev, "failed to add to PM domain %s: %d", in __genpd_dev_pm_attach()
2678 pd->name, ret); in __genpd_dev_pm_attach()
2682 dev->pm_domain->detach = genpd_dev_pm_detach; in __genpd_dev_pm_attach()
2683 dev->pm_domain->sync = genpd_dev_pm_sync; in __genpd_dev_pm_attach()
2693 return -EPROBE_DEFER; in __genpd_dev_pm_attach()
2697 pstate = of_get_required_opp_performance_state(dev->of_node, index); in __genpd_dev_pm_attach()
2698 if (pstate < 0 && pstate != -ENODEV && pstate != -EOPNOTSUPP) { in __genpd_dev_pm_attach()
2705 dev_gpd_data(dev)->default_pstate = pstate; in __genpd_dev_pm_attach()
2710 dev_err(dev, "failed to set required performance state for power-domain %s: %d\n", in __genpd_dev_pm_attach()
2711 pd->name, ret); in __genpd_dev_pm_attach()
2717 * genpd_dev_pm_attach - Attach a device to its PM domain using DT.
2720 * Parse device's OF node to find a PM domain specifier. If such is found,
2723 * Returns 1 on successfully attached PM domain, 0 when the device don't need a
2724 * PM domain or when multiple power-domains exists for it, else a negative error
2725 * code. Note that if a power-domain exists for the device, but it cannot be
2726 * found or turned on, then return -EPROBE_DEFER to ensure that the device is
2727 * not probed and to re-try again later.
2731 if (!dev->of_node) in genpd_dev_pm_attach()
2736 * can only attach one PM domain per device. in genpd_dev_pm_attach()
2738 if (of_count_phandle_with_args(dev->of_node, "power-domains", in genpd_dev_pm_attach()
2739 "#power-domain-cells") != 1) in genpd_dev_pm_attach()
2747 * genpd_dev_pm_attach_by_id - Associate a device with one of its PM domains.
2748 * @dev: The device used to lookup the PM domain.
2749 * @index: The index of the PM domain.
2751 * Parse device's OF node to find a PM domain specifier at the provided @index.
2753 * pm_domain ops. To deal with detaching of the virtual device, the ->detach()
2756 * Returns the created virtual device if successfully attached PM domain, NULL
2757 * when the device don't need a PM domain, else an ERR_PTR() in case of
2758 * failures. If a power-domain exists for the device, but cannot be found or
2759 * turned on, then ERR_PTR(-EPROBE_DEFER) is returned to ensure that the device
2760 * is not probed and to re-try again later.
2769 if (!dev->of_node) in genpd_dev_pm_attach_by_id()
2773 num_domains = of_count_phandle_with_args(dev->of_node, "power-domains", in genpd_dev_pm_attach_by_id()
2774 "#power-domain-cells"); in genpd_dev_pm_attach_by_id()
2781 return ERR_PTR(-ENOMEM); in genpd_dev_pm_attach_by_id()
2784 virt_dev->bus = &genpd_bus_type; in genpd_dev_pm_attach_by_id()
2785 virt_dev->release = genpd_release_dev; in genpd_dev_pm_attach_by_id()
2786 virt_dev->of_node = of_node_get(dev->of_node); in genpd_dev_pm_attach_by_id()
2794 /* Try to attach the device to the PM domain at the specified index. */ in genpd_dev_pm_attach_by_id()
2809 * genpd_dev_pm_attach_by_name - Associate a device with one of its PM domains.
2810 * @dev: The device used to lookup the PM domain.
2811 * @name: The name of the PM domain.
2813 * Parse device's OF node to find a PM domain specifier using the
2814 * power-domain-names DT property. For further description see
2821 if (!dev->of_node) in genpd_dev_pm_attach_by_name()
2824 index = of_property_match_string(dev->of_node, "power-domain-names", in genpd_dev_pm_attach_by_name()
2833 { .compatible = "domain-idle-state", },
2844 err = of_property_read_u32(state_node, "entry-latency-us", in genpd_parse_state()
2847 pr_debug(" * %pOF missing entry-latency-us property\n", in genpd_parse_state()
2849 return -EINVAL; in genpd_parse_state()
2852 err = of_property_read_u32(state_node, "exit-latency-us", in genpd_parse_state()
2855 pr_debug(" * %pOF missing exit-latency-us property\n", in genpd_parse_state()
2857 return -EINVAL; in genpd_parse_state()
2860 err = of_property_read_u32(state_node, "min-residency-us", &residency); in genpd_parse_state()
2862 genpd_state->residency_ns = 1000 * residency; in genpd_parse_state()
2864 genpd_state->power_on_latency_ns = 1000 * exit_latency; in genpd_parse_state()
2865 genpd_state->power_off_latency_ns = 1000 * entry_latency; in genpd_parse_state()
2866 genpd_state->fwnode = &state_node->fwnode; in genpd_parse_state()
2879 ret = of_count_phandle_with_args(dn, "domain-idle-states", NULL); in genpd_iterate_idle_states()
2881 return ret == -ENOENT ? 0 : ret; in genpd_iterate_idle_states()
2884 of_for_each_phandle(&it, ret, dn, "domain-idle-states", NULL, 0) { in genpd_iterate_idle_states()
2912 * free the memory after use. If any or zero compatible domain idle states is
2933 return -ENOMEM; in of_genpd_parse_idle_states()
2938 return ret < 0 ? ret : -EINVAL; in of_genpd_parse_idle_states()
2949 * pm_genpd_opp_to_performance_state - Gets performance state of the genpd from its OPP node.
2951 * @genpd_dev: Genpd's device for which the performance-state needs to be found.
2956 * platform specific genpd->opp_to_performance_state() callback to translate
2957 * power domain OPP to performance state.
2969 if (unlikely(!genpd->opp_to_performance_state)) in pm_genpd_opp_to_performance_state()
2973 state = genpd->opp_to_performance_state(genpd, opp); in pm_genpd_opp_to_performance_state()
3006 if (dev->power.runtime_error) in rtpm_status_str()
3008 else if (dev->power.disable_depth) in rtpm_status_str()
3010 else if (dev->power.runtime_status < ARRAY_SIZE(status_lookup)) in rtpm_status_str()
3011 p = status_lookup[dev->power.runtime_status]; in rtpm_status_str()
3015 seq_printf(s, "%-25s ", p); in rtpm_status_str()
3022 gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); in perf_status_str()
3023 seq_put_decimal_ull(s, "", gpd_data->performance_state); in perf_status_str()
3041 return -ERESTARTSYS; in genpd_summary_one()
3043 if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup))) in genpd_summary_one()
3046 snprintf(state, sizeof(state), "%s-%u", in genpd_summary_one()
3047 status_lookup[genpd->status], genpd->state_idx); in genpd_summary_one()
3050 status_lookup[genpd->status]); in genpd_summary_one()
3051 seq_printf(s, "%-30s %-50s %u", genpd->name, state, genpd->performance_state); in genpd_summary_one()
3056 * Also genpd->name is immutable. in genpd_summary_one()
3058 list_for_each_entry(link, &genpd->parent_links, parent_node) { in genpd_summary_one()
3059 if (list_is_first(&link->parent_node, &genpd->parent_links)) in genpd_summary_one()
3061 seq_printf(s, "%s", link->child->name); in genpd_summary_one()
3062 if (!list_is_last(&link->parent_node, &genpd->parent_links)) in genpd_summary_one()
3066 list_for_each_entry(pm_data, &genpd->dev_list, list_node) { in genpd_summary_one()
3067 kobj_path = kobject_get_path(&pm_data->dev->kobj, in genpd_summary_one()
3073 seq_printf(s, "\n %-50s ", kobj_path); in genpd_summary_one()
3074 rtpm_status_str(s, pm_data->dev); in genpd_summary_one()
3075 perf_status_str(s, pm_data->dev); in genpd_summary_one()
3091 …seq_puts(s, "domain status children pe… in summary_show()
3093 …seq_puts(s, "-------------------------------------------------------------------------------------… in summary_show()
3097 return -ERESTARTSYS; in summary_show()
3116 struct generic_pm_domain *genpd = s->private; in status_show()
3121 return -ERESTARTSYS; in status_show()
3123 if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup))) in status_show()
3126 if (genpd->status == GENPD_STATE_OFF) in status_show()
3127 seq_printf(s, "%s-%u\n", status_lookup[genpd->status], in status_show()
3128 genpd->state_idx); in status_show()
3130 seq_printf(s, "%s\n", status_lookup[genpd->status]); in status_show()
3138 struct generic_pm_domain *genpd = s->private; in sub_domains_show()
3144 return -ERESTARTSYS; in sub_domains_show()
3146 list_for_each_entry(link, &genpd->parent_links, parent_node) in sub_domains_show()
3147 seq_printf(s, "%s\n", link->child->name); in sub_domains_show()
3155 struct generic_pm_domain *genpd = s->private; in idle_states_show()
3161 return -ERESTARTSYS; in idle_states_show()
3165 for (i = 0; i < genpd->state_count; i++) { in idle_states_show()
3169 if ((genpd->status == GENPD_STATE_OFF) && in idle_states_show()
3170 (genpd->state_idx == i)) in idle_states_show()
3171 delta = ktime_sub(ktime_get(), genpd->accounting_time); in idle_states_show()
3174 ktime_add(genpd->states[i].idle_time, delta)); in idle_states_show()
3175 seq_printf(s, "S%-13i %-14lld %-14llu %llu\n", i, msecs, in idle_states_show()
3176 genpd->states[i].usage, genpd->states[i].rejected); in idle_states_show()
3185 struct generic_pm_domain *genpd = s->private; in active_time_show()
3191 return -ERESTARTSYS; in active_time_show()
3193 if (genpd->status == GENPD_STATE_ON) in active_time_show()
3194 delta = ktime_sub(ktime_get(), genpd->accounting_time); in active_time_show()
3197 ktime_add(genpd->on_time, delta))); in active_time_show()
3205 struct generic_pm_domain *genpd = s->private; in total_idle_time_show()
3212 return -ERESTARTSYS; in total_idle_time_show()
3214 for (i = 0; i < genpd->state_count; i++) { in total_idle_time_show()
3216 if ((genpd->status == GENPD_STATE_OFF) && in total_idle_time_show()
3217 (genpd->state_idx == i)) in total_idle_time_show()
3218 delta = ktime_sub(ktime_get(), genpd->accounting_time); in total_idle_time_show()
3220 total = ktime_add(total, genpd->states[i].idle_time); in total_idle_time_show()
3233 struct generic_pm_domain *genpd = s->private; in devices_show()
3240 return -ERESTARTSYS; in devices_show()
3242 list_for_each_entry(pm_data, &genpd->dev_list, list_node) { in devices_show()
3243 kobj_path = kobject_get_path(&pm_data->dev->kobj, in devices_show()
3259 struct generic_pm_domain *genpd = s->private; in perf_state_show()
3262 return -ERESTARTSYS; in perf_state_show()
3264 seq_printf(s, "%u\n", genpd->performance_state); in perf_state_show()
3286 d = debugfs_create_dir(genpd->name, genpd_debugfs_dir); in genpd_debug_add()
3300 if (genpd->set_performance_state) in genpd_debug_add()