1 // SPDX-License-Identifier: GPL-2.0
3  *  thermal.c - Generic Thermal Management Sysfs support.
12 #include <linux/device.h>
59 		if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH))  in __find_governor()
66  * bind_previous_governor() - bind the previous governor of the thermal zone
76 	if (tz->governor && tz->governor->bind_to_tz) {  in bind_previous_governor()
77 		if (tz->governor->bind_to_tz(tz)) {  in bind_previous_governor()
78 			dev_err(&tz->device,  in bind_previous_governor()
80 				failed_gov_name, tz->governor->name, tz->type);  in bind_previous_governor()
81 			tz->governor = NULL;  in bind_previous_governor()
87  * thermal_set_governor() - Switch to another governor
100 	if (tz->governor && tz->governor->unbind_from_tz)  in thermal_set_governor()
101 		tz->governor->unbind_from_tz(tz);  in thermal_set_governor()
103 	if (new_gov && new_gov->bind_to_tz) {  in thermal_set_governor()
104 		ret = new_gov->bind_to_tz(tz);  in thermal_set_governor()
106 			bind_previous_governor(tz, new_gov->name);  in thermal_set_governor()
112 	tz->governor = new_gov;  in thermal_set_governor()
124 		return -EINVAL;  in thermal_register_governor()
128 	err = -EBUSY;  in thermal_register_governor()
129 	if (!__find_governor(governor->name)) {  in thermal_register_governor()
133 		list_add(&governor->governor_list, &thermal_governor_list);  in thermal_register_governor()
134 		match_default = !strncmp(governor->name,  in thermal_register_governor()
146 		 * only thermal zones with specified tz->tzp->governor_name  in thermal_register_governor()
147 		 * may run with tz->govenor unset  in thermal_register_governor()
149 		if (pos->governor)  in thermal_register_governor()
152 		name = pos->tzp->governor_name;  in thermal_register_governor()
154 		if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) {  in thermal_register_governor()
159 				dev_err(&pos->device,  in thermal_register_governor()
161 					governor->name, pos->type, ret);  in thermal_register_governor()
180 	if (!__find_governor(governor->name))  in thermal_unregister_governor()
186 		if (!strncasecmp(pos->governor->name, governor->name,  in thermal_unregister_governor()
192 	list_del(&governor->governor_list);  in thermal_unregister_governor()
201 	int ret = -EINVAL;  in thermal_zone_device_set_policy()
204 	mutex_lock(&tz->lock);  in thermal_zone_device_set_policy()
213 	mutex_unlock(&tz->lock);  in thermal_zone_device_set_policy()
216 	thermal_notify_tz_gov_change(tz->id, policy);  in thermal_zone_device_set_policy()
229 		count += scnprintf(buf + count, PAGE_SIZE - count, "%s ",  in thermal_build_list_of_policies()
230 				   pos->name);  in thermal_build_list_of_policies()
232 	count += scnprintf(buf + count, PAGE_SIZE - count, "\n");  in thermal_build_list_of_policies()
256 			       (*governor)->name);  in thermal_register_governors()
261 			(*governor)->name);  in thermal_register_governors()
284  * - Non-critical trips will invoke the governor responsible for that zone;
285  * - Hot trips will produce a notification to userspace;
286  * - Critical trip point will cause a system shutdown.
293 				 &tz->poll_queue, delay);  in thermal_zone_device_set_polling()
295 		cancel_delayed_work(&tz->poll_queue);  in thermal_zone_device_set_polling()
300 	if (tz->mode != THERMAL_DEVICE_ENABLED)  in monitor_thermal_zone()
302 	else if (tz->passive)  in monitor_thermal_zone()
303 		thermal_zone_device_set_polling(tz, tz->passive_delay_jiffies);  in monitor_thermal_zone()
304 	else if (tz->polling_delay_jiffies)  in monitor_thermal_zone()
305 		thermal_zone_device_set_polling(tz, tz->polling_delay_jiffies);  in monitor_thermal_zone()
310 	tz->governor ? tz->governor->throttle(tz, trip) :  in handle_non_critical_trips()
311 		       def_governor->throttle(tz, trip);  in handle_non_critical_trips()
322 	dev_emerg(&tz->device, "%s: critical temperature reached, "  in thermal_zone_device_critical()
323 		  "shutting down\n", tz->type);  in thermal_zone_device_critical()
333 	if (trip_temp <= 0 || tz->temperature < trip_temp)  in handle_critical_trips()
338 	if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot)  in handle_critical_trips()
339 		tz->ops->hot(tz);  in handle_critical_trips()
341 		tz->ops->critical(tz);  in handle_critical_trips()
350 	if (test_bit(trip, &tz->trips_disabled))  in handle_thermal_trip()
353 	tz->ops->get_trip_temp(tz, trip, &trip_temp);  in handle_thermal_trip()
354 	tz->ops->get_trip_type(tz, trip, &type);  in handle_thermal_trip()
355 	if (tz->ops->get_trip_hyst)  in handle_thermal_trip()
356 		tz->ops->get_trip_hyst(tz, trip, &hyst);  in handle_thermal_trip()
358 	if (tz->last_temperature != THERMAL_TEMP_INVALID) {  in handle_thermal_trip()
359 		if (tz->last_temperature < trip_temp &&  in handle_thermal_trip()
360 		    tz->temperature >= trip_temp)  in handle_thermal_trip()
361 			thermal_notify_tz_trip_up(tz->id, trip,  in handle_thermal_trip()
362 						  tz->temperature);  in handle_thermal_trip()
363 		if (tz->last_temperature >= trip_temp &&  in handle_thermal_trip()
364 		    tz->temperature < (trip_temp - hyst))  in handle_thermal_trip()
365 			thermal_notify_tz_trip_down(tz->id, trip,  in handle_thermal_trip()
366 						    tz->temperature);  in handle_thermal_trip()
381 		if (ret != -EAGAIN)  in update_temperature()
382 			dev_warn(&tz->device,  in update_temperature()
388 	tz->last_temperature = tz->temperature;  in update_temperature()
389 	tz->temperature = temp;  in update_temperature()
393 	thermal_genl_sampling_temp(tz->id, temp);  in update_temperature()
399 	tz->temperature = THERMAL_TEMP_INVALID;  in thermal_zone_device_init()
400 	tz->prev_low_trip = -INT_MAX;  in thermal_zone_device_init()
401 	tz->prev_high_trip = INT_MAX;  in thermal_zone_device_init()
402 	list_for_each_entry(pos, &tz->thermal_instances, tz_node)  in thermal_zone_device_init()
403 		pos->initialized = false;  in thermal_zone_device_init()
411 	mutex_lock(&tz->lock);  in thermal_zone_device_set_mode()
414 	if (mode == tz->mode) {  in thermal_zone_device_set_mode()
415 		mutex_unlock(&tz->lock);  in thermal_zone_device_set_mode()
420 	if (tz->ops->change_mode)  in thermal_zone_device_set_mode()
421 		ret = tz->ops->change_mode(tz, mode);  in thermal_zone_device_set_mode()
424 		tz->mode = mode;  in thermal_zone_device_set_mode()
426 	mutex_unlock(&tz->lock);  in thermal_zone_device_set_mode()
431 		thermal_notify_tz_enable(tz->id);  in thermal_zone_device_set_mode()
433 		thermal_notify_tz_disable(tz->id);  in thermal_zone_device_set_mode()
452 	lockdep_assert_held(&tz->lock);  in thermal_zone_device_is_enabled()
454 	return tz->mode == THERMAL_DEVICE_ENABLED;  in thermal_zone_device_is_enabled()
465 	if (WARN_ONCE(!tz->ops->get_temp, "'%s' must not be called without "  in thermal_zone_device_update()
469 	mutex_lock(&tz->lock);  in thermal_zone_device_update()
478 	tz->notify_event = event;  in thermal_zone_device_update()
480 	for (count = 0; count < tz->num_trips; count++)  in thermal_zone_device_update()
485 	mutex_unlock(&tz->lock);  in thermal_zone_device_update()
554 		if (tz->id == id) {  in thermal_zone_get_by_id()
565  * Device management section: cooling devices, zones devices, and binding
568  * - cooling devices lifecycle: registration, unregistration,
570  * - thermal zone devices lifecycle: registration, unregistration,
575  * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone
577  * @trip:	indicates which trip point the cooling devices is
580  * @upper:	the Maximum cooling state for this trip point.
582  *		and the cooling device can be in max_state.
583  * @lower:	the Minimum cooling state can be used for this trip point.
585  *		and the cooling device can be in cooling state 0.
586  * @weight:	The weight of the cooling device to be bound to the
590  * This interface function bind a thermal cooling device to the certain trip
591  * point of a thermal zone device.
592  * This function is usually called in the thermal zone device .bind callback.
609 	if (trip >= tz->num_trips || trip < 0)  in thermal_zone_bind_cooling_device()
610 		return -EINVAL;  in thermal_zone_bind_cooling_device()
622 		return -EINVAL;  in thermal_zone_bind_cooling_device()
624 	ret = cdev->ops->get_max_state(cdev, &max_state);  in thermal_zone_bind_cooling_device()
633 		return -EINVAL;  in thermal_zone_bind_cooling_device()
637 		return -ENOMEM;  in thermal_zone_bind_cooling_device()
638 	dev->tz = tz;  in thermal_zone_bind_cooling_device()
639 	dev->cdev = cdev;  in thermal_zone_bind_cooling_device()
640 	dev->trip = trip;  in thermal_zone_bind_cooling_device()
641 	dev->upper = upper;  in thermal_zone_bind_cooling_device()
642 	dev->lower = lower;  in thermal_zone_bind_cooling_device()
643 	dev->target = THERMAL_NO_TARGET;  in thermal_zone_bind_cooling_device()
644 	dev->weight = weight;  in thermal_zone_bind_cooling_device()
646 	result = ida_alloc(&tz->ida, GFP_KERNEL);  in thermal_zone_bind_cooling_device()
650 	dev->id = result;  in thermal_zone_bind_cooling_device()
651 	sprintf(dev->name, "cdev%d", dev->id);  in thermal_zone_bind_cooling_device()
653 	    sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);  in thermal_zone_bind_cooling_device()
657 	sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);  in thermal_zone_bind_cooling_device()
658 	sysfs_attr_init(&dev->attr.attr);  in thermal_zone_bind_cooling_device()
659 	dev->attr.attr.name = dev->attr_name;  in thermal_zone_bind_cooling_device()
660 	dev->attr.attr.mode = 0444;  in thermal_zone_bind_cooling_device()
661 	dev->attr.show = trip_point_show;  in thermal_zone_bind_cooling_device()
662 	result = device_create_file(&tz->device, &dev->attr);  in thermal_zone_bind_cooling_device()
666 	sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id);  in thermal_zone_bind_cooling_device()
667 	sysfs_attr_init(&dev->weight_attr.attr);  in thermal_zone_bind_cooling_device()
668 	dev->weight_attr.attr.name = dev->weight_attr_name;  in thermal_zone_bind_cooling_device()
669 	dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO;  in thermal_zone_bind_cooling_device()
670 	dev->weight_attr.show = weight_show;  in thermal_zone_bind_cooling_device()
671 	dev->weight_attr.store = weight_store;  in thermal_zone_bind_cooling_device()
672 	result = device_create_file(&tz->device, &dev->weight_attr);  in thermal_zone_bind_cooling_device()
676 	mutex_lock(&tz->lock);  in thermal_zone_bind_cooling_device()
677 	mutex_lock(&cdev->lock);  in thermal_zone_bind_cooling_device()
678 	list_for_each_entry(pos, &tz->thermal_instances, tz_node)  in thermal_zone_bind_cooling_device()
679 		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {  in thermal_zone_bind_cooling_device()
680 			result = -EEXIST;  in thermal_zone_bind_cooling_device()
684 		list_add_tail(&dev->tz_node, &tz->thermal_instances);  in thermal_zone_bind_cooling_device()
685 		list_add_tail(&dev->cdev_node, &cdev->thermal_instances);  in thermal_zone_bind_cooling_device()
686 		atomic_set(&tz->need_update, 1);  in thermal_zone_bind_cooling_device()
688 	mutex_unlock(&cdev->lock);  in thermal_zone_bind_cooling_device()
689 	mutex_unlock(&tz->lock);  in thermal_zone_bind_cooling_device()
694 	device_remove_file(&tz->device, &dev->weight_attr);  in thermal_zone_bind_cooling_device()
696 	device_remove_file(&tz->device, &dev->attr);  in thermal_zone_bind_cooling_device()
698 	sysfs_remove_link(&tz->device.kobj, dev->name);  in thermal_zone_bind_cooling_device()
700 	ida_free(&tz->ida, dev->id);  in thermal_zone_bind_cooling_device()
708  * thermal_zone_unbind_cooling_device() - unbind a cooling device from a
711  * @trip:	indicates which trip point the cooling devices is
715  * This interface function unbind a thermal cooling device from the certain
716  * trip point of a thermal zone device.
717  * This function is usually called in the thermal zone device .unbind callback.
727 	mutex_lock(&tz->lock);  in thermal_zone_unbind_cooling_device()
728 	mutex_lock(&cdev->lock);  in thermal_zone_unbind_cooling_device()
729 	list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {  in thermal_zone_unbind_cooling_device()
730 		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {  in thermal_zone_unbind_cooling_device()
731 			list_del(&pos->tz_node);  in thermal_zone_unbind_cooling_device()
732 			list_del(&pos->cdev_node);  in thermal_zone_unbind_cooling_device()
733 			mutex_unlock(&cdev->lock);  in thermal_zone_unbind_cooling_device()
734 			mutex_unlock(&tz->lock);  in thermal_zone_unbind_cooling_device()
738 	mutex_unlock(&cdev->lock);  in thermal_zone_unbind_cooling_device()
739 	mutex_unlock(&tz->lock);  in thermal_zone_unbind_cooling_device()
741 	return -ENODEV;  in thermal_zone_unbind_cooling_device()
744 	device_remove_file(&tz->device, &pos->weight_attr);  in thermal_zone_unbind_cooling_device()
745 	device_remove_file(&tz->device, &pos->attr);  in thermal_zone_unbind_cooling_device()
746 	sysfs_remove_link(&tz->device.kobj, pos->name);  in thermal_zone_unbind_cooling_device()
747 	ida_free(&tz->ida, pos->id);  in thermal_zone_unbind_cooling_device()
753 static void thermal_release(struct device *dev)  in thermal_release()
759 		     sizeof("thermal_zone") - 1)) {  in thermal_release()
764 			    sizeof("cooling_device") - 1)) {  in thermal_release()
779 	dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",  in print_bind_err_msg()
780 		tz->type, cdev->type, ret);  in print_bind_err_msg()
790 	for (i = 0; i < tz->num_trips; i++) {  in __bind()
818 		if (!pos->tzp && !pos->ops->bind)  in bind_cdev()
821 		if (pos->ops->bind) {  in bind_cdev()
822 			ret = pos->ops->bind(pos, cdev);  in bind_cdev()
828 		tzp = pos->tzp;  in bind_cdev()
829 		if (!tzp || !tzp->tbp)  in bind_cdev()
832 		for (i = 0; i < tzp->num_tbps; i++) {  in bind_cdev()
833 			if (tzp->tbp[i].cdev || !tzp->tbp[i].match)  in bind_cdev()
835 			if (tzp->tbp[i].match(pos, cdev))  in bind_cdev()
837 			tzp->tbp[i].cdev = cdev;  in bind_cdev()
838 			__bind(pos, tzp->tbp[i].trip_mask, cdev,  in bind_cdev()
839 			       tzp->tbp[i].binding_limits,  in bind_cdev()
840 			       tzp->tbp[i].weight);  in bind_cdev()
848  * __thermal_cooling_device_register() - register a new thermal cooling device
849  * @np:		a pointer to a device tree node.
850  * @type:	the thermal cooling device type.
851  * @devdata:	device private data.
852  * @ops:		standard thermal cooling devices callbacks.
854  * This interface function adds a new thermal cooling device (fan/processor/...)
855  * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
857  * It also gives the opportunity to link the cooling device to a device tree
858  * node, so that it can be bound to a thermal zone created out of device tree.
872 	if (!ops || !ops->get_max_state || !ops->get_cur_state ||  in __thermal_cooling_device_register()
873 	    !ops->set_cur_state)  in __thermal_cooling_device_register()
874 		return ERR_PTR(-EINVAL);  in __thermal_cooling_device_register()
878 		return ERR_PTR(-ENOMEM);  in __thermal_cooling_device_register()
883 	cdev->id = ret;  in __thermal_cooling_device_register()
886 	ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id);  in __thermal_cooling_device_register()
890 	cdev->type = kstrdup(type ? type : "", GFP_KERNEL);  in __thermal_cooling_device_register()
891 	if (!cdev->type) {  in __thermal_cooling_device_register()
892 		ret = -ENOMEM;  in __thermal_cooling_device_register()
896 	mutex_init(&cdev->lock);  in __thermal_cooling_device_register()
897 	INIT_LIST_HEAD(&cdev->thermal_instances);  in __thermal_cooling_device_register()
898 	cdev->np = np;  in __thermal_cooling_device_register()
899 	cdev->ops = ops;  in __thermal_cooling_device_register()
900 	cdev->updated = false;  in __thermal_cooling_device_register()
901 	cdev->device.class = &thermal_class;  in __thermal_cooling_device_register()
902 	cdev->devdata = devdata;  in __thermal_cooling_device_register()
904 	ret = device_register(&cdev->device);  in __thermal_cooling_device_register()
910 	list_add(&cdev->node, &thermal_cdev_list);  in __thermal_cooling_device_register()
918 		if (atomic_cmpxchg(&pos->need_update, 1, 0))  in __thermal_cooling_device_register()
927 	kfree(cdev->type);  in __thermal_cooling_device_register()
928 	put_device(&cdev->device);  in __thermal_cooling_device_register()
938  * thermal_cooling_device_register() - register a new thermal cooling device
939  * @type:	the thermal cooling device type.
940  * @devdata:	device private data.
941  * @ops:		standard thermal cooling devices callbacks.
943  * This interface function adds a new thermal cooling device (fan/processor/...)
944  * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
959  * thermal_of_cooling_device_register() - register an OF thermal cooling device
960  * @np:		a pointer to a device tree node.
961  * @type:	the thermal cooling device type.
962  * @devdata:	device private data.
963  * @ops:		standard thermal cooling devices callbacks.
965  * This function will register a cooling device with device tree node reference.
966  * This interface function adds a new thermal cooling device (fan/processor/...)
967  * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
982 static void thermal_cooling_device_release(struct device *dev, void *res)  in thermal_cooling_device_release()
989  * devm_thermal_of_cooling_device_register() - register an OF thermal cooling
990  *					       device
991  * @dev:	a valid struct device pointer of a sensor device.
992  * @np:		a pointer to a device tree node.
993  * @type:	the thermal cooling device type.
994  * @devdata:	device private data.
995  * @ops:	standard thermal cooling devices callbacks.
997  * This function will register a cooling device with device tree node reference.
998  * This interface function adds a new thermal cooling device (fan/processor/...)
999  * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself
1006 devm_thermal_of_cooling_device_register(struct device *dev,  in devm_thermal_of_cooling_device_register()
1016 		return ERR_PTR(-ENOMEM);  in devm_thermal_of_cooling_device_register()
1036 	for (i = 0; i < tz->num_trips; i++)  in __unbind()
1042  * thermal_cooling_device_unregister - removes a thermal cooling device
1043  * @cdev:	the thermal cooling device to remove.
1046  * thermal cooling device is no longer needed.
1063 		/* thermal cooling device not found */  in thermal_cooling_device_unregister()
1067 	list_del(&cdev->node);  in thermal_cooling_device_unregister()
1071 		if (tz->ops->unbind) {  in thermal_cooling_device_unregister()
1072 			tz->ops->unbind(tz, cdev);  in thermal_cooling_device_unregister()
1076 		if (!tz->tzp || !tz->tzp->tbp)  in thermal_cooling_device_unregister()
1079 		tzp = tz->tzp;  in thermal_cooling_device_unregister()
1080 		for (i = 0; i < tzp->num_tbps; i++) {  in thermal_cooling_device_unregister()
1081 			if (tzp->tbp[i].cdev == cdev) {  in thermal_cooling_device_unregister()
1082 				__unbind(tz, tzp->tbp[i].trip_mask, cdev);  in thermal_cooling_device_unregister()
1083 				tzp->tbp[i].cdev = NULL;  in thermal_cooling_device_unregister()
1090 	ida_free(&thermal_cdev_ida, cdev->id);  in thermal_cooling_device_unregister()
1091 	device_del(&cdev->device);  in thermal_cooling_device_unregister()
1093 	kfree(cdev->type);  in thermal_cooling_device_unregister()
1094 	put_device(&cdev->device);  in thermal_cooling_device_unregister()
1102 	const struct thermal_zone_params *tzp = tz->tzp;  in bind_tz()
1104 	if (!tzp && !tz->ops->bind)  in bind_tz()
1109 	/* If there is ops->bind, try to use ops->bind */  in bind_tz()
1110 	if (tz->ops->bind) {  in bind_tz()
1112 			ret = tz->ops->bind(tz, pos);  in bind_tz()
1119 	if (!tzp || !tzp->tbp)  in bind_tz()
1123 		for (i = 0; i < tzp->num_tbps; i++) {  in bind_tz()
1124 			if (tzp->tbp[i].cdev || !tzp->tbp[i].match)  in bind_tz()
1126 			if (tzp->tbp[i].match(tz, pos))  in bind_tz()
1128 			tzp->tbp[i].cdev = pos;  in bind_tz()
1129 			__bind(tz, tzp->tbp[i].trip_mask, pos,  in bind_tz()
1130 			       tzp->tbp[i].binding_limits,  in bind_tz()
1131 			       tzp->tbp[i].weight);  in bind_tz()
1146  * thermal_zone_device_register_with_trips() - register a new thermal zone device
1147  * @type:	the thermal zone device type
1151  * @devdata:	private device data
1152  * @ops:	standard thermal zone device callbacks
1155  *		   performing passive cooling
1160  * This interface function adds a new thermal zone device (sensor) to
1161  * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the
1162  * thermal cooling devices registered at the same time.
1163  * thermal_zone_device_unregister() must be called when the device is no
1164  * longer needed. The passive cooling depends on the .get_trend() return value.
1186 		return ERR_PTR(-EINVAL);  in thermal_zone_device_register_with_trips()
1192 		return ERR_PTR(-EINVAL);  in thermal_zone_device_register_with_trips()
1198 	 * warning: right shift count >= width of type [-Wshift-count- overflow]  in thermal_zone_device_register_with_trips()
1208 	if (num_trips > (BITS_PER_TYPE(int) - 1) || num_trips < 0 || mask >> num_trips) {  in thermal_zone_device_register_with_trips()
1210 		return ERR_PTR(-EINVAL);  in thermal_zone_device_register_with_trips()
1214 		pr_err("Thermal zone device ops not defined\n");  in thermal_zone_device_register_with_trips()
1215 		return ERR_PTR(-EINVAL);  in thermal_zone_device_register_with_trips()
1218 	if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp))  in thermal_zone_device_register_with_trips()
1219 		return ERR_PTR(-EINVAL);  in thermal_zone_device_register_with_trips()
1223 		return ERR_PTR(-ENOMEM);  in thermal_zone_device_register_with_trips()
1225 	INIT_LIST_HEAD(&tz->thermal_instances);  in thermal_zone_device_register_with_trips()
1226 	ida_init(&tz->ida);  in thermal_zone_device_register_with_trips()
1227 	mutex_init(&tz->lock);  in thermal_zone_device_register_with_trips()
1234 	tz->id = id;  in thermal_zone_device_register_with_trips()
1235 	strscpy(tz->type, type, sizeof(tz->type));  in thermal_zone_device_register_with_trips()
1237 	result = dev_set_name(&tz->device, "thermal_zone%d", tz->id);  in thermal_zone_device_register_with_trips()
1241 	if (!ops->critical)  in thermal_zone_device_register_with_trips()
1242 		ops->critical = thermal_zone_device_critical;  in thermal_zone_device_register_with_trips()
1244 	tz->ops = ops;  in thermal_zone_device_register_with_trips()
1245 	tz->tzp = tzp;  in thermal_zone_device_register_with_trips()
1246 	tz->device.class = &thermal_class;  in thermal_zone_device_register_with_trips()
1247 	tz->devdata = devdata;  in thermal_zone_device_register_with_trips()
1248 	tz->trips = trips;  in thermal_zone_device_register_with_trips()
1249 	tz->num_trips = num_trips;  in thermal_zone_device_register_with_trips()
1251 	thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay);  in thermal_zone_device_register_with_trips()
1252 	thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay);  in thermal_zone_device_register_with_trips()
1261 	atomic_set(&tz->need_update, 1);  in thermal_zone_device_register_with_trips()
1263 	result = device_register(&tz->device);  in thermal_zone_device_register_with_trips()
1268 		if (tz->ops->get_trip_type(tz, count, &trip_type) ||  in thermal_zone_device_register_with_trips()
1269 		    tz->ops->get_trip_temp(tz, count, &trip_temp) ||  in thermal_zone_device_register_with_trips()
1271 			set_bit(count, &tz->trips_disabled);  in thermal_zone_device_register_with_trips()
1277 	if (tz->tzp)  in thermal_zone_device_register_with_trips()
1278 		governor = __find_governor(tz->tzp->governor_name);  in thermal_zone_device_register_with_trips()
1290 	if (!tz->tzp || !tz->tzp->no_hwmon) {  in thermal_zone_device_register_with_trips()
1297 	list_add_tail(&tz->node, &thermal_tz_list);  in thermal_zone_device_register_with_trips()
1300 	/* Bind cooling devices for this zone */  in thermal_zone_device_register_with_trips()
1303 	INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check);  in thermal_zone_device_register_with_trips()
1307 	if (atomic_cmpxchg(&tz->need_update, 1, 0))  in thermal_zone_device_register_with_trips()
1310 	thermal_notify_tz_create(tz->id, tz->type);  in thermal_zone_device_register_with_trips()
1315 	device_del(&tz->device);  in thermal_zone_device_register_with_trips()
1317 	put_device(&tz->device);  in thermal_zone_device_register_with_trips()
1339  * thermal_zone_device_unregister - removes the registered thermal zone device
1340  * @tz: the thermal zone device to remove
1352 	tzp = tz->tzp;  in thermal_zone_device_unregister()
1353 	tz_id = tz->id;  in thermal_zone_device_unregister()
1360 		/* thermal zone device not found */  in thermal_zone_device_unregister()
1364 	list_del(&tz->node);  in thermal_zone_device_unregister()
1368 		if (tz->ops->unbind) {  in thermal_zone_device_unregister()
1369 			tz->ops->unbind(tz, cdev);  in thermal_zone_device_unregister()
1373 		if (!tzp || !tzp->tbp)  in thermal_zone_device_unregister()
1376 		for (i = 0; i < tzp->num_tbps; i++) {  in thermal_zone_device_unregister()
1377 			if (tzp->tbp[i].cdev == cdev) {  in thermal_zone_device_unregister()
1378 				__unbind(tz, tzp->tbp[i].trip_mask, cdev);  in thermal_zone_device_unregister()
1379 				tzp->tbp[i].cdev = NULL;  in thermal_zone_device_unregister()
1386 	cancel_delayed_work_sync(&tz->poll_queue);  in thermal_zone_device_unregister()
1391 	ida_free(&thermal_tz_ida, tz->id);  in thermal_zone_device_unregister()
1392 	ida_destroy(&tz->ida);  in thermal_zone_device_unregister()
1393 	mutex_destroy(&tz->lock);  in thermal_zone_device_unregister()
1394 	device_unregister(&tz->device);  in thermal_zone_device_unregister()
1401  * thermal_zone_get_zone_by_name() - search for a zone and returns its ref
1407  * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid
1408  * paramenters, -ENODEV for not found and -EEXIST for multiple matches).
1412 	struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL);  in thermal_zone_get_zone_by_name()
1420 		if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) {  in thermal_zone_get_zone_by_name()
1428 		ref = ERR_PTR(-ENODEV);  in thermal_zone_get_zone_by_name()
1431 		ref = ERR_PTR(-EEXIST);  in thermal_zone_get_zone_by_name()