Lines Matching full:devfreq
3 * devfreq: Generic Dynamic Voltage and Frequency Scaling (DVFS) Framework
21 #include <linux/devfreq.h>
32 #include <trace/events/devfreq.h>
40 * devfreq core provides delayed work based load monitoring helper
46 /* The list of all device-devfreq governors */
48 /* The list of all device-devfreq */
58 * find_device_devfreq() - find devfreq struct using device pointer
59 * @dev: device pointer used to lookup device devfreq.
62 * devfreq info. devfreq_list_lock should be held by the caller.
64 static struct devfreq *find_device_devfreq(struct device *dev) in find_device_devfreq()
66 struct devfreq *tmp_devfreq; in find_device_devfreq()
71 pr_err("DEVFREQ: %s: Invalid parameters\n", __func__); in find_device_devfreq()
83 static unsigned long find_available_min_freq(struct devfreq *devfreq) in find_available_min_freq() argument
88 opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &min_freq); in find_available_min_freq()
97 static unsigned long find_available_max_freq(struct devfreq *devfreq) in find_available_max_freq() argument
102 opp = dev_pm_opp_find_freq_floor(devfreq->dev.parent, &max_freq); in find_available_max_freq()
113 * @devfreq: the devfreq instance
119 static void get_freq_range(struct devfreq *devfreq, in get_freq_range() argument
123 unsigned long *freq_table = devfreq->profile->freq_table; in get_freq_range()
126 lockdep_assert_held(&devfreq->lock); in get_freq_range()
130 * The devfreq drivers can initialize this in either ascending or in get_freq_range()
131 * descending order and devfreq core supports both. in get_freq_range()
133 if (freq_table[0] < freq_table[devfreq->profile->max_state - 1]) { in get_freq_range()
135 *max_freq = freq_table[devfreq->profile->max_state - 1]; in get_freq_range()
137 *min_freq = freq_table[devfreq->profile->max_state - 1]; in get_freq_range()
142 qos_min_freq = dev_pm_qos_read_value(devfreq->dev.parent, in get_freq_range()
144 qos_max_freq = dev_pm_qos_read_value(devfreq->dev.parent, in get_freq_range()
152 *min_freq = max(*min_freq, devfreq->scaling_min_freq); in get_freq_range()
153 *max_freq = min(*max_freq, devfreq->scaling_max_freq); in get_freq_range()
161 * @devfreq: the devfreq instance
164 static int devfreq_get_freq_level(struct devfreq *devfreq, unsigned long freq) in devfreq_get_freq_level() argument
168 for (lev = 0; lev < devfreq->profile->max_state; lev++) in devfreq_get_freq_level()
169 if (freq == devfreq->profile->freq_table[lev]) in devfreq_get_freq_level()
175 static int set_freq_table(struct devfreq *devfreq) in set_freq_table() argument
177 struct devfreq_dev_profile *profile = devfreq->profile; in set_freq_table()
183 count = dev_pm_opp_get_opp_count(devfreq->dev.parent); in set_freq_table()
188 profile->freq_table = devm_kcalloc(devfreq->dev.parent, in set_freq_table()
198 opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &freq); in set_freq_table()
200 devm_kfree(devfreq->dev.parent, profile->freq_table); in set_freq_table()
212 * devfreq_update_status() - Update statistics of devfreq behavior
213 * @devfreq: the devfreq instance
216 int devfreq_update_status(struct devfreq *devfreq, unsigned long freq) in devfreq_update_status() argument
221 lockdep_assert_held(&devfreq->lock); in devfreq_update_status()
225 if (!devfreq->previous_freq) in devfreq_update_status()
228 prev_lev = devfreq_get_freq_level(devfreq, devfreq->previous_freq); in devfreq_update_status()
234 devfreq->stats.time_in_state[prev_lev] += in devfreq_update_status()
235 cur_time - devfreq->stats.last_update; in devfreq_update_status()
237 lev = devfreq_get_freq_level(devfreq, freq); in devfreq_update_status()
244 devfreq->stats.trans_table[ in devfreq_update_status()
245 (prev_lev * devfreq->profile->max_state) + lev]++; in devfreq_update_status()
246 devfreq->stats.total_trans++; in devfreq_update_status()
250 devfreq->stats.last_update = cur_time; in devfreq_update_status()
256 * find_devfreq_governor() - find devfreq governor from name
259 * Search the list of devfreq governors and return the matched
269 pr_err("DEVFREQ: %s: Invalid parameters\n", __func__); in find_devfreq_governor()
286 * Search the list of devfreq governors and request the module and try again
300 pr_err("DEVFREQ: %s: Invalid parameters\n", __func__); in try_then_request_governor()
324 static int devfreq_notify_transition(struct devfreq *devfreq, in devfreq_notify_transition() argument
327 if (!devfreq) in devfreq_notify_transition()
332 srcu_notifier_call_chain(&devfreq->transition_notifier_list, in devfreq_notify_transition()
337 srcu_notifier_call_chain(&devfreq->transition_notifier_list, in devfreq_notify_transition()
347 static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq, in devfreq_set_target() argument
354 if (devfreq->profile->get_cur_freq) in devfreq_set_target()
355 devfreq->profile->get_cur_freq(devfreq->dev.parent, &cur_freq); in devfreq_set_target()
357 cur_freq = devfreq->previous_freq; in devfreq_set_target()
361 devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE); in devfreq_set_target()
363 err = devfreq->profile->target(devfreq->dev.parent, &new_freq, flags); in devfreq_set_target()
366 devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE); in devfreq_set_target()
371 devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE); in devfreq_set_target()
373 if (devfreq_update_status(devfreq, new_freq)) in devfreq_set_target()
374 dev_err(&devfreq->dev, in devfreq_set_target()
377 devfreq->previous_freq = new_freq; in devfreq_set_target()
379 if (devfreq->suspend_freq) in devfreq_set_target()
380 devfreq->resume_freq = new_freq; in devfreq_set_target()
389 * @devfreq: the devfreq instance.
391 * Note: Lock devfreq->lock before calling update_devfreq
394 int update_devfreq(struct devfreq *devfreq) in update_devfreq() argument
400 lockdep_assert_held(&devfreq->lock); in update_devfreq()
402 if (!devfreq->governor) in update_devfreq()
406 err = devfreq->governor->get_target_freq(devfreq, &freq); in update_devfreq()
409 get_freq_range(devfreq, &min_freq, &max_freq); in update_devfreq()
420 return devfreq_set_target(devfreq, freq, flags); in update_devfreq()
426 * devfreq_monitor() - Periodically poll devfreq objects.
433 struct devfreq *devfreq = container_of(work, in devfreq_monitor() local
434 struct devfreq, work.work); in devfreq_monitor()
436 mutex_lock(&devfreq->lock); in devfreq_monitor()
437 err = update_devfreq(devfreq); in devfreq_monitor()
439 dev_err(&devfreq->dev, "dvfs failed with (%d) error\n", err); in devfreq_monitor()
441 if (devfreq->stop_polling) in devfreq_monitor()
444 queue_delayed_work(devfreq_wq, &devfreq->work, in devfreq_monitor()
445 msecs_to_jiffies(devfreq->profile->polling_ms)); in devfreq_monitor()
448 mutex_unlock(&devfreq->lock); in devfreq_monitor()
449 trace_devfreq_monitor(devfreq); in devfreq_monitor()
453 * devfreq_monitor_start() - Start load monitoring of devfreq instance
454 * @devfreq: the devfreq instance.
456 * Helper function for starting devfreq device load monitoring. By
459 * event when device is added to devfreq framework.
461 void devfreq_monitor_start(struct devfreq *devfreq) in devfreq_monitor_start() argument
463 if (devfreq->governor->interrupt_driven) in devfreq_monitor_start()
466 mutex_lock(&devfreq->lock); in devfreq_monitor_start()
467 if (delayed_work_pending(&devfreq->work)) in devfreq_monitor_start()
470 switch (devfreq->profile->timer) { in devfreq_monitor_start()
472 INIT_DEFERRABLE_WORK(&devfreq->work, devfreq_monitor); in devfreq_monitor_start()
475 INIT_DELAYED_WORK(&devfreq->work, devfreq_monitor); in devfreq_monitor_start()
481 if (devfreq->profile->polling_ms) in devfreq_monitor_start()
482 queue_delayed_work(devfreq_wq, &devfreq->work, in devfreq_monitor_start()
483 msecs_to_jiffies(devfreq->profile->polling_ms)); in devfreq_monitor_start()
486 devfreq->stop_polling = false; in devfreq_monitor_start()
487 mutex_unlock(&devfreq->lock); in devfreq_monitor_start()
492 * devfreq_monitor_stop() - Stop load monitoring of a devfreq instance
493 * @devfreq: the devfreq instance.
495 * Helper function to stop devfreq device load monitoring. Function
497 * event when device is removed from devfreq framework.
499 void devfreq_monitor_stop(struct devfreq *devfreq) in devfreq_monitor_stop() argument
501 if (devfreq->governor->interrupt_driven) in devfreq_monitor_stop()
504 mutex_lock(&devfreq->lock); in devfreq_monitor_stop()
505 if (devfreq->stop_polling) { in devfreq_monitor_stop()
506 mutex_unlock(&devfreq->lock); in devfreq_monitor_stop()
510 devfreq->stop_polling = true; in devfreq_monitor_stop()
511 mutex_unlock(&devfreq->lock); in devfreq_monitor_stop()
512 cancel_delayed_work_sync(&devfreq->work); in devfreq_monitor_stop()
517 * devfreq_monitor_suspend() - Suspend load monitoring of a devfreq instance
518 * @devfreq: the devfreq instance.
520 * Helper function to suspend devfreq device load monitoring. Function
528 void devfreq_monitor_suspend(struct devfreq *devfreq) in devfreq_monitor_suspend() argument
530 mutex_lock(&devfreq->lock); in devfreq_monitor_suspend()
531 if (devfreq->stop_polling) { in devfreq_monitor_suspend()
532 mutex_unlock(&devfreq->lock); in devfreq_monitor_suspend()
536 devfreq_update_status(devfreq, devfreq->previous_freq); in devfreq_monitor_suspend()
537 devfreq->stop_polling = true; in devfreq_monitor_suspend()
538 mutex_unlock(&devfreq->lock); in devfreq_monitor_suspend()
540 if (devfreq->governor->interrupt_driven) in devfreq_monitor_suspend()
543 cancel_delayed_work_sync(&devfreq->work); in devfreq_monitor_suspend()
548 * devfreq_monitor_resume() - Resume load monitoring of a devfreq instance
549 * @devfreq: the devfreq instance.
551 * Helper function to resume devfreq device load monitoring. Function
555 void devfreq_monitor_resume(struct devfreq *devfreq) in devfreq_monitor_resume() argument
559 mutex_lock(&devfreq->lock); in devfreq_monitor_resume()
560 if (!devfreq->stop_polling) in devfreq_monitor_resume()
563 if (devfreq->governor->interrupt_driven) in devfreq_monitor_resume()
566 if (!delayed_work_pending(&devfreq->work) && in devfreq_monitor_resume()
567 devfreq->profile->polling_ms) in devfreq_monitor_resume()
568 queue_delayed_work(devfreq_wq, &devfreq->work, in devfreq_monitor_resume()
569 msecs_to_jiffies(devfreq->profile->polling_ms)); in devfreq_monitor_resume()
572 devfreq->stats.last_update = get_jiffies_64(); in devfreq_monitor_resume()
573 devfreq->stop_polling = false; in devfreq_monitor_resume()
575 if (devfreq->profile->get_cur_freq && in devfreq_monitor_resume()
576 !devfreq->profile->get_cur_freq(devfreq->dev.parent, &freq)) in devfreq_monitor_resume()
577 devfreq->previous_freq = freq; in devfreq_monitor_resume()
580 mutex_unlock(&devfreq->lock); in devfreq_monitor_resume()
585 * devfreq_update_interval() - Update device devfreq monitoring interval
586 * @devfreq: the devfreq instance.
592 void devfreq_update_interval(struct devfreq *devfreq, unsigned int *delay) in devfreq_update_interval() argument
594 unsigned int cur_delay = devfreq->profile->polling_ms; in devfreq_update_interval()
597 mutex_lock(&devfreq->lock); in devfreq_update_interval()
598 devfreq->profile->polling_ms = new_delay; in devfreq_update_interval()
600 if (devfreq->stop_polling) in devfreq_update_interval()
603 if (devfreq->governor->interrupt_driven) in devfreq_update_interval()
608 mutex_unlock(&devfreq->lock); in devfreq_update_interval()
609 cancel_delayed_work_sync(&devfreq->work); in devfreq_update_interval()
615 queue_delayed_work(devfreq_wq, &devfreq->work, in devfreq_update_interval()
616 msecs_to_jiffies(devfreq->profile->polling_ms)); in devfreq_update_interval()
622 mutex_unlock(&devfreq->lock); in devfreq_update_interval()
623 cancel_delayed_work_sync(&devfreq->work); in devfreq_update_interval()
624 mutex_lock(&devfreq->lock); in devfreq_update_interval()
625 if (!devfreq->stop_polling) in devfreq_update_interval()
626 queue_delayed_work(devfreq_wq, &devfreq->work, in devfreq_update_interval()
627 msecs_to_jiffies(devfreq->profile->polling_ms)); in devfreq_update_interval()
630 mutex_unlock(&devfreq->lock); in devfreq_update_interval()
636 * has been changed out of devfreq framework.
637 * @nb: the notifier_block (supposed to be devfreq->nb)
641 * Called by a notifier that uses devfreq->nb.
646 struct devfreq *devfreq = container_of(nb, struct devfreq, nb); in devfreq_notifier_call() local
649 mutex_lock(&devfreq->lock); in devfreq_notifier_call()
651 devfreq->scaling_min_freq = find_available_min_freq(devfreq); in devfreq_notifier_call()
652 if (!devfreq->scaling_min_freq) in devfreq_notifier_call()
655 devfreq->scaling_max_freq = find_available_max_freq(devfreq); in devfreq_notifier_call()
656 if (!devfreq->scaling_max_freq) { in devfreq_notifier_call()
657 devfreq->scaling_max_freq = ULONG_MAX; in devfreq_notifier_call()
661 err = update_devfreq(devfreq); in devfreq_notifier_call()
664 mutex_unlock(&devfreq->lock); in devfreq_notifier_call()
666 dev_err(devfreq->dev.parent, in devfreq_notifier_call()
675 * @devfreq: the devfreq instance.
677 static int qos_notifier_call(struct devfreq *devfreq) in qos_notifier_call() argument
681 mutex_lock(&devfreq->lock); in qos_notifier_call()
682 err = update_devfreq(devfreq); in qos_notifier_call()
683 mutex_unlock(&devfreq->lock); in qos_notifier_call()
685 dev_err(devfreq->dev.parent, in qos_notifier_call()
694 * @nb: Should be devfreq->nb_min
699 return qos_notifier_call(container_of(nb, struct devfreq, nb_min)); in qos_min_notifier_call()
704 * @nb: Should be devfreq->nb_max
709 return qos_notifier_call(container_of(nb, struct devfreq, nb_max)); in qos_max_notifier_call()
714 * @dev: the devfreq device
716 * Remove devfreq from the list and release its resources.
720 struct devfreq *devfreq = to_devfreq(dev); in devfreq_dev_release() local
724 list_del(&devfreq->node); in devfreq_dev_release()
727 err = dev_pm_qos_remove_notifier(devfreq->dev.parent, &devfreq->nb_max, in devfreq_dev_release()
732 err = dev_pm_qos_remove_notifier(devfreq->dev.parent, &devfreq->nb_min, in devfreq_dev_release()
738 if (dev_pm_qos_request_active(&devfreq->user_max_freq_req)) { in devfreq_dev_release()
739 err = dev_pm_qos_remove_request(&devfreq->user_max_freq_req); in devfreq_dev_release()
744 if (dev_pm_qos_request_active(&devfreq->user_min_freq_req)) { in devfreq_dev_release()
745 err = dev_pm_qos_remove_request(&devfreq->user_min_freq_req); in devfreq_dev_release()
751 if (devfreq->profile->exit) in devfreq_dev_release()
752 devfreq->profile->exit(devfreq->dev.parent); in devfreq_dev_release()
754 mutex_destroy(&devfreq->lock); in devfreq_dev_release()
755 srcu_cleanup_notifier_head(&devfreq->transition_notifier_list); in devfreq_dev_release()
756 kfree(devfreq); in devfreq_dev_release()
760 * devfreq_add_device() - Add devfreq feature to the device
761 * @dev: the device to add devfreq feature.
762 * @profile: device-specific profile to run devfreq.
764 * @data: devfreq driver pass to governors, governor should not change it.
766 struct devfreq *devfreq_add_device(struct device *dev, in devfreq_add_device()
771 struct devfreq *devfreq; in devfreq_add_device() local
781 devfreq = find_device_devfreq(dev); in devfreq_add_device()
783 if (!IS_ERR(devfreq)) { in devfreq_add_device()
784 dev_err(dev, "%s: devfreq device already exists!\n", in devfreq_add_device()
790 devfreq = kzalloc(sizeof(struct devfreq), GFP_KERNEL); in devfreq_add_device()
791 if (!devfreq) { in devfreq_add_device()
796 mutex_init(&devfreq->lock); in devfreq_add_device()
797 mutex_lock(&devfreq->lock); in devfreq_add_device()
798 devfreq->dev.parent = dev; in devfreq_add_device()
799 devfreq->dev.class = devfreq_class; in devfreq_add_device()
800 devfreq->dev.release = devfreq_dev_release; in devfreq_add_device()
801 INIT_LIST_HEAD(&devfreq->node); in devfreq_add_device()
802 devfreq->profile = profile; in devfreq_add_device()
803 strscpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN); in devfreq_add_device()
804 devfreq->previous_freq = profile->initial_freq; in devfreq_add_device()
805 devfreq->last_status.current_frequency = profile->initial_freq; in devfreq_add_device()
806 devfreq->data = data; in devfreq_add_device()
807 devfreq->nb.notifier_call = devfreq_notifier_call; in devfreq_add_device()
809 if (devfreq->profile->timer < 0 in devfreq_add_device()
810 || devfreq->profile->timer >= DEVFREQ_TIMER_NUM) { in devfreq_add_device()
811 mutex_unlock(&devfreq->lock); in devfreq_add_device()
816 if (!devfreq->profile->max_state && !devfreq->profile->freq_table) { in devfreq_add_device()
817 mutex_unlock(&devfreq->lock); in devfreq_add_device()
818 err = set_freq_table(devfreq); in devfreq_add_device()
821 mutex_lock(&devfreq->lock); in devfreq_add_device()
824 devfreq->scaling_min_freq = find_available_min_freq(devfreq); in devfreq_add_device()
825 if (!devfreq->scaling_min_freq) { in devfreq_add_device()
826 mutex_unlock(&devfreq->lock); in devfreq_add_device()
831 devfreq->scaling_max_freq = find_available_max_freq(devfreq); in devfreq_add_device()
832 if (!devfreq->scaling_max_freq) { in devfreq_add_device()
833 mutex_unlock(&devfreq->lock); in devfreq_add_device()
838 devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev); in devfreq_add_device()
839 atomic_set(&devfreq->suspend_count, 0); in devfreq_add_device()
841 dev_set_name(&devfreq->dev, "%s", dev_name(dev)); in devfreq_add_device()
842 err = device_register(&devfreq->dev); in devfreq_add_device()
844 mutex_unlock(&devfreq->lock); in devfreq_add_device()
845 put_device(&devfreq->dev); in devfreq_add_device()
849 devfreq->stats.trans_table = devm_kzalloc(&devfreq->dev, in devfreq_add_device()
851 devfreq->profile->max_state, in devfreq_add_device()
852 devfreq->profile->max_state), in devfreq_add_device()
854 if (!devfreq->stats.trans_table) { in devfreq_add_device()
855 mutex_unlock(&devfreq->lock); in devfreq_add_device()
860 devfreq->stats.time_in_state = devm_kcalloc(&devfreq->dev, in devfreq_add_device()
861 devfreq->profile->max_state, in devfreq_add_device()
862 sizeof(*devfreq->stats.time_in_state), in devfreq_add_device()
864 if (!devfreq->stats.time_in_state) { in devfreq_add_device()
865 mutex_unlock(&devfreq->lock); in devfreq_add_device()
870 devfreq->stats.total_trans = 0; in devfreq_add_device()
871 devfreq->stats.last_update = get_jiffies_64(); in devfreq_add_device()
873 srcu_init_notifier_head(&devfreq->transition_notifier_list); in devfreq_add_device()
875 mutex_unlock(&devfreq->lock); in devfreq_add_device()
877 err = dev_pm_qos_add_request(dev, &devfreq->user_min_freq_req, in devfreq_add_device()
881 err = dev_pm_qos_add_request(dev, &devfreq->user_max_freq_req, in devfreq_add_device()
887 devfreq->nb_min.notifier_call = qos_min_notifier_call; in devfreq_add_device()
888 err = dev_pm_qos_add_notifier(devfreq->dev.parent, &devfreq->nb_min, in devfreq_add_device()
893 devfreq->nb_max.notifier_call = qos_max_notifier_call; in devfreq_add_device()
894 err = dev_pm_qos_add_notifier(devfreq->dev.parent, &devfreq->nb_max, in devfreq_add_device()
901 governor = try_then_request_governor(devfreq->governor_name); in devfreq_add_device()
909 devfreq->governor = governor; in devfreq_add_device()
910 err = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_START, in devfreq_add_device()
918 list_add(&devfreq->node, &devfreq_list); in devfreq_add_device()
922 return devfreq; in devfreq_add_device()
927 devfreq_remove_device(devfreq); in devfreq_add_device()
928 devfreq = NULL; in devfreq_add_device()
930 kfree(devfreq); in devfreq_add_device()
937 * devfreq_remove_device() - Remove devfreq feature from a device.
938 * @devfreq: the devfreq instance to be removed
942 int devfreq_remove_device(struct devfreq *devfreq) in devfreq_remove_device() argument
944 if (!devfreq) in devfreq_remove_device()
947 if (devfreq->governor) in devfreq_remove_device()
948 devfreq->governor->event_handler(devfreq, in devfreq_remove_device()
950 device_unregister(&devfreq->dev); in devfreq_remove_device()
958 struct devfreq **r = res; in devm_devfreq_dev_match()
968 devfreq_remove_device(*(struct devfreq **)res); in devm_devfreq_dev_release()
973 * @dev: the device to add devfreq feature.
974 * @profile: device-specific profile to run devfreq.
976 * @data: devfreq driver pass to governors, governor should not change it.
978 * This function manages automatically the memory of devfreq device using device
979 * resource management and simplify the free operation for memory of devfreq
982 struct devfreq *devm_devfreq_add_device(struct device *dev, in devm_devfreq_add_device()
987 struct devfreq **ptr, *devfreq; in devm_devfreq_add_device() local
993 devfreq = devfreq_add_device(dev, profile, governor_name, data); in devm_devfreq_add_device()
994 if (IS_ERR(devfreq)) { in devm_devfreq_add_device()
996 return devfreq; in devm_devfreq_add_device()
999 *ptr = devfreq; in devm_devfreq_add_device()
1002 return devfreq; in devm_devfreq_add_device()
1008 * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree
1011 * return the instance of devfreq device
1013 struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) in devfreq_get_devfreq_by_node()
1015 struct devfreq *devfreq; in devfreq_get_devfreq_by_node() local
1021 list_for_each_entry(devfreq, &devfreq_list, node) { in devfreq_get_devfreq_by_node()
1022 if (devfreq->dev.parent in devfreq_get_devfreq_by_node()
1023 && devfreq->dev.parent->of_node == node) { in devfreq_get_devfreq_by_node()
1025 return devfreq; in devfreq_get_devfreq_by_node()
1034 * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree
1037 * @index - index into list of devfreq
1039 * return the instance of devfreq device
1041 struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, in devfreq_get_devfreq_by_phandle()
1045 struct devfreq *devfreq; in devfreq_get_devfreq_by_phandle() local
1057 devfreq = devfreq_get_devfreq_by_node(node); in devfreq_get_devfreq_by_phandle()
1060 return devfreq; in devfreq_get_devfreq_by_phandle()
1064 struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) in devfreq_get_devfreq_by_node()
1069 struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, in devfreq_get_devfreq_by_phandle()
1080 * @dev: the device from which to remove devfreq feature.
1081 * @devfreq: the devfreq instance to be removed
1083 void devm_devfreq_remove_device(struct device *dev, struct devfreq *devfreq) in devm_devfreq_remove_device() argument
1086 devm_devfreq_dev_match, devfreq)); in devm_devfreq_remove_device()
1091 * devfreq_suspend_device() - Suspend devfreq of a device.
1092 * @devfreq: the devfreq instance to be suspended
1096 * holds the devfreq.
1098 int devfreq_suspend_device(struct devfreq *devfreq) in devfreq_suspend_device() argument
1102 if (!devfreq) in devfreq_suspend_device()
1105 if (atomic_inc_return(&devfreq->suspend_count) > 1) in devfreq_suspend_device()
1108 if (devfreq->governor) { in devfreq_suspend_device()
1109 ret = devfreq->governor->event_handler(devfreq, in devfreq_suspend_device()
1115 if (devfreq->suspend_freq) { in devfreq_suspend_device()
1116 mutex_lock(&devfreq->lock); in devfreq_suspend_device()
1117 ret = devfreq_set_target(devfreq, devfreq->suspend_freq, 0); in devfreq_suspend_device()
1118 mutex_unlock(&devfreq->lock); in devfreq_suspend_device()
1128 * devfreq_resume_device() - Resume devfreq of a device.
1129 * @devfreq: the devfreq instance to be resumed
1133 * holds the devfreq.
1135 int devfreq_resume_device(struct devfreq *devfreq) in devfreq_resume_device() argument
1139 if (!devfreq) in devfreq_resume_device()
1142 if (atomic_dec_return(&devfreq->suspend_count) >= 1) in devfreq_resume_device()
1145 if (devfreq->resume_freq) { in devfreq_resume_device()
1146 mutex_lock(&devfreq->lock); in devfreq_resume_device()
1147 ret = devfreq_set_target(devfreq, devfreq->resume_freq, 0); in devfreq_resume_device()
1148 mutex_unlock(&devfreq->lock); in devfreq_resume_device()
1153 if (devfreq->governor) { in devfreq_resume_device()
1154 ret = devfreq->governor->event_handler(devfreq, in devfreq_resume_device()
1165 * devfreq_suspend() - Suspend devfreq governors and devices
1168 * and devices preserving the state for resume. On some platforms the devfreq
1174 struct devfreq *devfreq; in devfreq_suspend() local
1178 list_for_each_entry(devfreq, &devfreq_list, node) { in devfreq_suspend()
1179 ret = devfreq_suspend_device(devfreq); in devfreq_suspend()
1181 dev_err(&devfreq->dev, in devfreq_suspend()
1182 "failed to suspend devfreq device\n"); in devfreq_suspend()
1188 * devfreq_resume() - Resume devfreq governors and devices
1195 struct devfreq *devfreq; in devfreq_resume() local
1199 list_for_each_entry(devfreq, &devfreq_list, node) { in devfreq_resume()
1200 ret = devfreq_resume_device(devfreq); in devfreq_resume()
1202 dev_warn(&devfreq->dev, in devfreq_resume()
1203 "failed to resume devfreq device\n"); in devfreq_resume()
1209 * devfreq_add_governor() - Add devfreq governor
1210 * @governor: the devfreq governor to be added
1215 struct devfreq *devfreq; in devfreq_add_governor() local
1234 list_for_each_entry(devfreq, &devfreq_list, node) { in devfreq_add_governor()
1236 struct device *dev = devfreq->dev.parent; in devfreq_add_governor()
1238 if (!strncmp(devfreq->governor_name, governor->name, in devfreq_add_governor()
1241 if (devfreq->governor) { in devfreq_add_governor()
1244 __func__, devfreq->governor->name); in devfreq_add_governor()
1245 ret = devfreq->governor->event_handler(devfreq, in devfreq_add_governor()
1251 devfreq->governor->name, ret); in devfreq_add_governor()
1255 devfreq->governor = governor; in devfreq_add_governor()
1256 ret = devfreq->governor->event_handler(devfreq, in devfreq_add_governor()
1260 __func__, devfreq->governor->name, in devfreq_add_governor()
1274 * devfreq_remove_governor() - Remove devfreq feature from a device.
1275 * @governor: the devfreq governor to be removed
1280 struct devfreq *devfreq; in devfreq_remove_governor() local
1296 list_for_each_entry(devfreq, &devfreq_list, node) { in devfreq_remove_governor()
1298 struct device *dev = devfreq->dev.parent; in devfreq_remove_governor()
1300 if (!strncmp(devfreq->governor_name, governor->name, in devfreq_remove_governor()
1302 /* we should have a devfreq governor! */ in devfreq_remove_governor()
1303 if (!devfreq->governor) { in devfreq_remove_governor()
1309 ret = devfreq->governor->event_handler(devfreq, in devfreq_remove_governor()
1313 __func__, devfreq->governor->name, in devfreq_remove_governor()
1316 devfreq->governor = NULL; in devfreq_remove_governor()
1331 struct devfreq *df = to_devfreq(dev); in name_show()
1339 struct devfreq *df = to_devfreq(dev); in governor_show()
1350 struct devfreq *df = to_devfreq(dev); in governor_store()
1414 struct devfreq *df = to_devfreq(d); in available_governors_show()
1423 * The devfreq with immutable governor (e.g., passive) shows in available_governors_show()
1430 * The devfreq device shows the registered governor except for in available_governors_show()
1460 struct devfreq *df = to_devfreq(dev); in cur_freq_show()
1476 struct devfreq *df = to_devfreq(dev); in target_freq_show()
1485 struct devfreq *df = to_devfreq(dev); in polling_interval_show()
1497 struct devfreq *df = to_devfreq(dev); in polling_interval_store()
1518 struct devfreq *df = to_devfreq(dev); in min_freq_store()
1545 struct devfreq *df = to_devfreq(dev); in min_freq_show()
1559 struct devfreq *df = to_devfreq(dev); in max_freq_store()
1599 struct devfreq *df = to_devfreq(dev); in max_freq_show()
1614 struct devfreq *df = to_devfreq(d); in available_frequencies_show()
1641 struct devfreq *df = to_devfreq(dev); in trans_stat_show()
1705 pr_warn_once("devfreq transition table exceeds PAGE_SIZE. Disabling\n"); in trans_stat_show()
1716 struct devfreq *df = to_devfreq(dev); in trans_stat_store()
1746 struct devfreq *df = to_devfreq(dev); in timer_show()
1757 struct devfreq *df = to_devfreq(dev); in timer_store()
1820 ATTRIBUTE_GROUPS(devfreq);
1823 * devfreq_summary_show() - Show the summary of the devfreq devices
1824 * @s: seq_file instance to show the summary of devfreq devices
1827 * Show the summary of the devfreq devices via 'devfreq_summary' debugfs file.
1828 * It helps that user can know the detailed information of the devfreq devices.
1834 struct devfreq *devfreq; in devfreq_summary_show() local
1835 struct devfreq *p_devfreq = NULL; in devfreq_summary_show()
1861 list_for_each_entry_reverse(devfreq, &devfreq_list, node) { in devfreq_summary_show()
1863 if (!strncmp(devfreq->governor_name, DEVFREQ_GOV_PASSIVE, in devfreq_summary_show()
1865 struct devfreq_passive_data *data = devfreq->data; in devfreq_summary_show()
1874 mutex_lock(&devfreq->lock); in devfreq_summary_show()
1875 cur_freq = devfreq->previous_freq; in devfreq_summary_show()
1876 get_freq_range(devfreq, &min_freq, &max_freq); in devfreq_summary_show()
1877 polling_ms = devfreq->profile->polling_ms; in devfreq_summary_show()
1878 timer = devfreq->profile->timer; in devfreq_summary_show()
1879 mutex_unlock(&devfreq->lock); in devfreq_summary_show()
1883 dev_name(&devfreq->dev), in devfreq_summary_show()
1885 devfreq->governor_name, in devfreq_summary_show()
1901 devfreq_class = class_create(THIS_MODULE, "devfreq"); in devfreq_init()
1915 devfreq_debugfs = debugfs_create_dir("devfreq", NULL); in devfreq_init()
1925 * The following are helper functions for devfreq user device drivers with
1932 * @dev: The devfreq user device. (parent of devfreq)
1934 * @flags: Flags handed from devfreq framework.
1966 * devfreq_register_opp_notifier() - Helper function to get devfreq notified
1969 * @dev: The devfreq user device. (parent of devfreq)
1970 * @devfreq: The devfreq object.
1972 int devfreq_register_opp_notifier(struct device *dev, struct devfreq *devfreq) in devfreq_register_opp_notifier() argument
1974 return dev_pm_opp_register_notifier(dev, &devfreq->nb); in devfreq_register_opp_notifier()
1979 * devfreq_unregister_opp_notifier() - Helper function to stop getting devfreq
1982 * @dev: The devfreq user device. (parent of devfreq)
1983 * @devfreq: The devfreq object.
1988 int devfreq_unregister_opp_notifier(struct device *dev, struct devfreq *devfreq) in devfreq_unregister_opp_notifier() argument
1990 return dev_pm_opp_unregister_notifier(dev, &devfreq->nb); in devfreq_unregister_opp_notifier()
1996 devfreq_unregister_opp_notifier(dev, *(struct devfreq **)res); in devm_devfreq_opp_release()
2002 * @dev: The devfreq user device. (parent of devfreq)
2003 * @devfreq: The devfreq object.
2006 struct devfreq *devfreq) in devm_devfreq_register_opp_notifier() argument
2008 struct devfreq **ptr; in devm_devfreq_register_opp_notifier()
2015 ret = devfreq_register_opp_notifier(dev, devfreq); in devm_devfreq_register_opp_notifier()
2021 *ptr = devfreq; in devm_devfreq_register_opp_notifier()
2031 * @dev: The devfreq user device. (parent of devfreq)
2032 * @devfreq: The devfreq object.
2035 struct devfreq *devfreq) in devm_devfreq_unregister_opp_notifier() argument
2038 devm_devfreq_dev_match, devfreq)); in devm_devfreq_unregister_opp_notifier()
2043 * devfreq_register_notifier() - Register a driver with devfreq
2044 * @devfreq: The devfreq object.
2048 int devfreq_register_notifier(struct devfreq *devfreq, in devfreq_register_notifier() argument
2054 if (!devfreq) in devfreq_register_notifier()
2060 &devfreq->transition_notifier_list, nb); in devfreq_register_notifier()
2071 * devfreq_unregister_notifier() - Unregister a driver with devfreq
2072 * @devfreq: The devfreq object.
2076 int devfreq_unregister_notifier(struct devfreq *devfreq, in devfreq_unregister_notifier() argument
2082 if (!devfreq) in devfreq_unregister_notifier()
2088 &devfreq->transition_notifier_list, nb); in devfreq_unregister_notifier()
2099 struct devfreq *devfreq; member
2108 devfreq_unregister_notifier(this->devfreq, this->nb, this->list); in devm_devfreq_notifier_release()
2114 * @dev: The devfreq user device. (parent of devfreq)
2115 * @devfreq: The devfreq object.
2120 struct devfreq *devfreq, in devm_devfreq_register_notifier() argument
2132 ret = devfreq_register_notifier(devfreq, nb, list); in devm_devfreq_register_notifier()
2138 ptr->devfreq = devfreq; in devm_devfreq_register_notifier()
2150 * @dev: The devfreq user device. (parent of devfreq)
2151 * @devfreq: The devfreq object.
2156 struct devfreq *devfreq, in devm_devfreq_unregister_notifier() argument
2161 devm_devfreq_dev_match, devfreq)); in devm_devfreq_unregister_notifier()