590 static void update_time_in_state(struct cooling_dev_stats *stats)  in update_time_in_state()  argument
594 	delta = ktime_sub(now, stats->last_time);  in update_time_in_state()
595 	stats->time_in_state[stats->state] =  in update_time_in_state()
596 		ktime_add(stats->time_in_state[stats->state], delta);  in update_time_in_state()
597 	stats->last_time = now;  in update_time_in_state()
603 	struct cooling_dev_stats *stats = cdev->stats;  in thermal_cooling_device_stats_update()  local
607 	if (!stats)  in thermal_cooling_device_stats_update()
610 	spin_lock(&stats->lock);  in thermal_cooling_device_stats_update()
612 	if (stats->state == new_state)  in thermal_cooling_device_stats_update()
615 	update_time_in_state(stats);  in thermal_cooling_device_stats_update()
616 	stats->trans_table[stats->state * (cdev->max_state + 1) + new_state]++;  in thermal_cooling_device_stats_update()
617 	stats->state = new_state;  in thermal_cooling_device_stats_update()
618 	stats->total_trans++;  in thermal_cooling_device_stats_update()
621 	spin_unlock(&stats->lock);  in thermal_cooling_device_stats_update()
628 	struct cooling_dev_stats *stats;  in total_trans_show()  local
633 	stats = cdev->stats;  in total_trans_show()
634 	if (!stats)  in total_trans_show()
637 	spin_lock(&stats->lock);  in total_trans_show()
638 	ret = sysfs_emit(buf, "%u\n", stats->total_trans);  in total_trans_show()
639 	spin_unlock(&stats->lock);  in total_trans_show()
649 	struct cooling_dev_stats *stats;  in time_in_state_ms_show()  local
655 	stats = cdev->stats;  in time_in_state_ms_show()
656 	if (!stats)  in time_in_state_ms_show()
659 	spin_lock(&stats->lock);  in time_in_state_ms_show()
661 	update_time_in_state(stats);  in time_in_state_ms_show()
665 				     ktime_to_ms(stats->time_in_state[i]));  in time_in_state_ms_show()
667 	spin_unlock(&stats->lock);  in time_in_state_ms_show()
677 	struct cooling_dev_stats *stats;  in reset_store()  local
682 	stats = cdev->stats;  in reset_store()
683 	if (!stats)  in reset_store()
688 	spin_lock(&stats->lock);  in reset_store()
690 	stats->total_trans = 0;  in reset_store()
691 	stats->last_time = ktime_get();  in reset_store()
692 	memset(stats->trans_table, 0,  in reset_store()
693 	       states * states * sizeof(*stats->trans_table));  in reset_store()
696 		stats->time_in_state[i] = ktime_set(0, 0);  in reset_store()
698 	spin_unlock(&stats->lock);  in reset_store()
707 	struct cooling_dev_stats *stats;  in trans_table_show()  local
713 	stats = cdev->stats;  in trans_table_show()
714 	if (!stats)  in trans_table_show()
735 				stats->trans_table[i * (cdev->max_state + 1) + j]);  in trans_table_show()
774 	struct cooling_dev_stats *stats;  in cooling_device_stats_setup()  local
779 	var = sizeof(*stats);  in cooling_device_stats_setup()
780 	var += sizeof(*stats->time_in_state) * states;  in cooling_device_stats_setup()
781 	var += sizeof(*stats->trans_table) * states * states;  in cooling_device_stats_setup()
783 	stats = kzalloc(var, GFP_KERNEL);  in cooling_device_stats_setup()
784 	if (!stats)  in cooling_device_stats_setup()
787 	stats->time_in_state = (ktime_t *)(stats + 1);  in cooling_device_stats_setup()
788 	stats->trans_table = (unsigned int *)(stats->time_in_state + states);  in cooling_device_stats_setup()
789 	cdev->stats = stats;  in cooling_device_stats_setup()
790 	stats->last_time = ktime_get();  in cooling_device_stats_setup()
792 	spin_lock_init(&stats->lock);  in cooling_device_stats_setup()
804 	kfree(cdev->stats);  in cooling_device_stats_destroy()
805 	cdev->stats = NULL;  in cooling_device_stats_destroy()