1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
27 #include <linux/device.h>
48 #define ACPI_THERMAL_TRIP_PASSIVE	(-1)
55  *   when re-evaluating the AML code.
57  *   We need to re-bind the cooling devices of a thermal zone when this occurs.
61 	acpi_handle_info(tz->device->handle, \
63 			 "Please report to linux-acpi@vger.kernel.org\n", str); \
110 	struct acpi_device *device;  member
124 /* --------------------------------------------------------------------------
126    -------------------------------------------------------------------------- */
134 		return -EINVAL;  in acpi_thermal_get_temperature()
136 	tz->last_temp_dk = tz->temp_dk;  in acpi_thermal_get_temperature()
138 	status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);  in acpi_thermal_get_temperature()
140 		return -ENODEV;  in acpi_thermal_get_temperature()
142 	tz->temp_dk = tmp;  in acpi_thermal_get_temperature()
144 	acpi_handle_debug(tz->device->handle, "Temperature is %lu dK\n",  in acpi_thermal_get_temperature()
145 			  tz->temp_dk);  in acpi_thermal_get_temperature()
156 		return -EINVAL;  in acpi_thermal_get_polling_frequency()
158 	status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);  in acpi_thermal_get_polling_frequency()
160 		return -ENODEV;  in acpi_thermal_get_polling_frequency()
162 	tz->polling_frequency = tmp;  in acpi_thermal_get_polling_frequency()
163 	acpi_handle_debug(tz->device->handle, "Polling frequency is %lu dS\n",  in acpi_thermal_get_polling_frequency()
164 			  tz->polling_frequency);  in acpi_thermal_get_polling_frequency()
177 						       tz->kelvin_offset);  in acpi_thermal_temp()
186 	return acpi_trip->temp_dk != THERMAL_TEMP_INVALID;  in acpi_thermal_trip_valid()
195 	return active - tz->trips.active;  in active_trip_index()
202 	if (acpi_passive_trip_temp(tz->device, &temp))  in get_passive_temp()
212 	if (acpi_active_trip_temp(tz->device, index, &temp))  in get_active_temp()
231 	struct acpi_thermal_trip *acpi_trip = trip->priv;  in acpi_thermal_update_trip()
233 	if (trip->type == THERMAL_TRIP_PASSIVE) {  in acpi_thermal_update_trip()
237 		acpi_trip->temp_dk = get_passive_temp(tz);  in acpi_thermal_update_trip()
241 		acpi_trip->temp_dk = get_active_temp(tz, index);  in acpi_thermal_update_trip()
261 	if (!acpi_evaluate_reference(tz->device->handle, method, NULL, &devices)) {  in update_trip_devices()
262 		acpi_handle_info(tz->device->handle, "%s evaluation failure\n", method);  in update_trip_devices()
266 	if (acpi_handle_list_equal(&acpi_trip->devices, &devices)) {  in update_trip_devices()
272 		ACPI_THERMAL_TRIPS_EXCEPTION(tz, "device");  in update_trip_devices()
274 	acpi_handle_list_replace(&acpi_trip->devices, &devices);  in update_trip_devices()
281 	struct acpi_thermal_trip *acpi_trip = trip->priv;  in acpi_thermal_update_trip_devices()
282 	int index = trip->type == THERMAL_TRIP_PASSIVE ?  in acpi_thermal_update_trip_devices()
288 	acpi_trip->temp_dk = THERMAL_TEMP_INVALID;  in acpi_thermal_update_trip_devices()
299 	struct acpi_thermal_trip *acpi_trip = trip->priv;  in acpi_thermal_adjust_trip()
301 	struct acpi_thermal *tz = atd->tz;  in acpi_thermal_adjust_trip()
307 	if (atd->event == ACPI_THERMAL_NOTIFY_THRESHOLDS)  in acpi_thermal_adjust_trip()
313 		temp = acpi_thermal_temp(tz, acpi_trip->temp_dk);  in acpi_thermal_adjust_trip()
317 	thermal_zone_set_trip_temp(tz->thermal_zone, trip, temp);  in acpi_thermal_adjust_trip()
324 	if (!work_pending(&tz->thermal_check_work))  in acpi_queue_thermal_check()
325 		queue_work(acpi_thermal_pm_queue, &tz->thermal_check_work);  in acpi_queue_thermal_check()
331 	struct acpi_device *adev = tz->device;  in acpi_thermal_trips_update()
340 	thermal_zone_for_each_trip(tz->thermal_zone,  in acpi_thermal_trips_update()
343 	acpi_bus_generate_netlink_event(adev->pnp.device_class,  in acpi_thermal_trips_update()
344 					dev_name(&adev->dev), event, 0);  in acpi_thermal_trips_update()
355 	if (crt == -1) {  in acpi_thermal_get_critical_trip()
356 		acpi_handle_debug(tz->device->handle, "Critical threshold disabled\n");  in acpi_thermal_get_critical_trip()
360 	if (acpi_critical_trip_temp(tz->device, &temp))  in acpi_thermal_get_critical_trip()
373 	acpi_handle_debug(tz->device->handle, "Critical threshold [%d]\n", temp);  in acpi_thermal_get_critical_trip()
381 	if (acpi_hot_trip_temp(tz->device, &temp) || temp == THERMAL_TEMP_INVALID) {  in acpi_thermal_get_hot_trip()
382 		acpi_handle_debug(tz->device->handle, "No hot threshold\n");  in acpi_thermal_get_hot_trip()
386 	acpi_handle_debug(tz->device->handle, "Hot threshold [%d]\n", temp);  in acpi_thermal_get_hot_trip()
395 	status = acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, &tmp);  in passive_trip_params_init()
399 	tz->trips.passive.tc1 = tmp;  in passive_trip_params_init()
401 	status = acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, &tmp);  in passive_trip_params_init()
405 	tz->trips.passive.tc2 = tmp;  in passive_trip_params_init()
407 	status = acpi_evaluate_integer(tz->device->handle, "_TFP", NULL, &tmp);  in passive_trip_params_init()
409 		tz->trips.passive.delay = tmp;  in passive_trip_params_init()
413 	status = acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, &tmp);  in passive_trip_params_init()
417 	tz->trips.passive.delay = tmp * 100;  in passive_trip_params_init()
428 		acpi_trip = &tz->trips.passive.trip;  in acpi_thermal_init_trip()
430 		if (psv == -1)  in acpi_thermal_init_trip()
439 		acpi_trip = &tz->trips.active[index].trip;  in acpi_thermal_init_trip()
441 		if (act == -1)  in acpi_thermal_init_trip()
453 	acpi_trip->temp_dk = temp;  in acpi_thermal_init_trip()
457 	acpi_trip->temp_dk = THERMAL_TEMP_INVALID;  in acpi_thermal_init_trip()
473 		tz->trips.active[i].trip.temp_dk = THERMAL_TEMP_INVALID;  in acpi_thermal_get_trip_points()
484 		return -EINVAL;  in thermal_get_temp()
490 	*temp = deci_kelvin_to_millicelsius_with_offset(tz->temp_dk,  in thermal_get_temp()
491 							tz->kelvin_offset);  in thermal_get_temp()
504 		return -EINVAL;  in thermal_get_trend()
506 	acpi_trip = trip->priv;  in thermal_get_trend()
508 		return -EINVAL;  in thermal_get_trend()
510 	switch (trip->type) {  in thermal_get_trend()
512 		t = tz->trips.passive.tc1 * (tz->temp_dk -  in thermal_get_trend()
513 						tz->last_temp_dk) +  in thermal_get_trend()
514 			tz->trips.passive.tc2 * (tz->temp_dk -  in thermal_get_trend()
515 						acpi_trip->temp_dk);  in thermal_get_trend()
526 		t = acpi_thermal_temp(tz, tz->temp_dk);  in thermal_get_trend()
527 		if (t <= trip->temperature)  in thermal_get_trend()
538 	return -EINVAL;  in thermal_get_trend()
545 	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,  in acpi_thermal_zone_device_hot()
546 					dev_name(&tz->device->dev),  in acpi_thermal_zone_device_hot()
554 	acpi_bus_generate_netlink_event(tz->device->pnp.device_class,  in acpi_thermal_zone_device_critical()
555 					dev_name(&tz->device->dev),  in acpi_thermal_zone_device_critical()
566 	struct acpi_thermal_trip *acpi_trip = trip->priv;  in acpi_thermal_should_bind_cdev()
567 	struct acpi_device *cdev_adev = cdev->devdata;  in acpi_thermal_should_bind_cdev()
574 	for (i = 0; i < acpi_trip->devices.count; i++) {  in acpi_thermal_should_bind_cdev()
575 		acpi_handle handle = acpi_trip->devices.handles[i];  in acpi_thermal_should_bind_cdev()  local
577 		if (acpi_fetch_acpi_dev(handle) == cdev_adev)  in acpi_thermal_should_bind_cdev()
594 	struct device *tzdev = thermal_zone_device(tz->thermal_zone);  in acpi_thermal_zone_sysfs_add()
597 	ret = sysfs_create_link(&tz->device->dev.kobj,  in acpi_thermal_zone_sysfs_add()
598 				&tzdev->kobj, "thermal_zone");  in acpi_thermal_zone_sysfs_add()
602 	ret = sysfs_create_link(&tzdev->kobj,  in acpi_thermal_zone_sysfs_add()
603 				   &tz->device->dev.kobj, "device");  in acpi_thermal_zone_sysfs_add()
605 		sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");  in acpi_thermal_zone_sysfs_add()
612 	struct device *tzdev = thermal_zone_device(tz->thermal_zone);  in acpi_thermal_zone_sysfs_remove()
614 	sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");  in acpi_thermal_zone_sysfs_remove()
615 	sysfs_remove_link(&tzdev->kobj, "device");  in acpi_thermal_zone_sysfs_remove()
626 		tz->thermal_zone = thermal_zone_device_register_with_trips(  in acpi_thermal_register_thermal_zone()
629 					tz->polling_frequency * 100);  in acpi_thermal_register_thermal_zone()
631 		tz->thermal_zone = thermal_tripless_zone_device_register(  in acpi_thermal_register_thermal_zone()
634 	if (IS_ERR(tz->thermal_zone))  in acpi_thermal_register_thermal_zone()
635 		return PTR_ERR(tz->thermal_zone);  in acpi_thermal_register_thermal_zone()
641 	result = thermal_zone_device_enable(tz->thermal_zone);  in acpi_thermal_register_thermal_zone()
645 	dev_info(&tz->device->dev, "registered as thermal_zone%d\n",  in acpi_thermal_register_thermal_zone()
646 		 thermal_zone_device_id(tz->thermal_zone));  in acpi_thermal_register_thermal_zone()
653 	thermal_zone_device_unregister(tz->thermal_zone);  in acpi_thermal_register_thermal_zone()
660 	thermal_zone_device_disable(tz->thermal_zone);  in acpi_thermal_unregister_thermal_zone()
662 	thermal_zone_device_unregister(tz->thermal_zone);  in acpi_thermal_unregister_thermal_zone()
663 	tz->thermal_zone = NULL;  in acpi_thermal_unregister_thermal_zone()
667 /* --------------------------------------------------------------------------
669    -------------------------------------------------------------------------- */
671 static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)  in acpi_thermal_notify()  argument
673 	struct acpi_device *device = data;  in acpi_thermal_notify()  local
674 	struct acpi_thermal *tz = acpi_driver_data(device);  in acpi_thermal_notify()
688 		acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",  in acpi_thermal_notify()
697  * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after
708 	acpi_handle handle = tz->device->handle;  in acpi_thermal_aml_dependency_fix()  local
712 	acpi_evaluate_integer(handle, "_CRT", NULL, &value);  in acpi_thermal_aml_dependency_fix()
713 	acpi_evaluate_integer(handle, "_HOT", NULL, &value);  in acpi_thermal_aml_dependency_fix()
714 	acpi_evaluate_integer(handle, "_PSV", NULL, &value);  in acpi_thermal_aml_dependency_fix()
719 		status = acpi_evaluate_integer(handle, name, NULL, &value);  in acpi_thermal_aml_dependency_fix()
723 	acpi_evaluate_integer(handle, "_TMP", NULL, &value);  in acpi_thermal_aml_dependency_fix()
739 		tz->kelvin_offset = 273100;  in acpi_thermal_guess_offset()
741 		tz->kelvin_offset = 273200;  in acpi_thermal_guess_offset()
757 	if (!refcount_dec_not_one(&tz->thermal_check_count))  in acpi_thermal_check_fn()
760 	mutex_lock(&tz->thermal_check_lock);  in acpi_thermal_check_fn()
762 	thermal_zone_device_update(tz->thermal_zone, THERMAL_EVENT_UNSPECIFIED);  in acpi_thermal_check_fn()
764 	refcount_inc(&tz->thermal_check_count);  in acpi_thermal_check_fn()
766 	mutex_unlock(&tz->thermal_check_lock);  in acpi_thermal_check_fn()
773 	acpi_handle_list_free(&tz->trips.passive.trip.devices);  in acpi_thermal_free_thermal_zone()
775 		acpi_handle_list_free(&tz->trips.active[i].trip.devices);  in acpi_thermal_free_thermal_zone()
780 static int acpi_thermal_add(struct acpi_device *device)  in acpi_thermal_add()  argument
791 	if (!device)  in acpi_thermal_add()
792 		return -EINVAL;  in acpi_thermal_add()
796 		return -ENOMEM;  in acpi_thermal_add()
798 	tz->device = device;  in acpi_thermal_add()
799 	strscpy(tz->name, device->pnp.bus_id);  in acpi_thermal_add()
800 	strscpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);  in acpi_thermal_add()
801 	strscpy(acpi_device_class(device), ACPI_THERMAL_CLASS);  in acpi_thermal_add()
802 	device->driver_data = tz;  in acpi_thermal_add()
818 	acpi_execute_simple_method(tz->device->handle, "_SCP",  in acpi_thermal_add()
823 		tz->polling_frequency = tzp;  in acpi_thermal_add()
832 		trip->type = THERMAL_TRIP_CRITICAL;  in acpi_thermal_add()
833 		trip->temperature = acpi_thermal_temp(tz, crit_temp);  in acpi_thermal_add()
838 		trip->type = THERMAL_TRIP_HOT;  in acpi_thermal_add()
839 		trip->temperature = acpi_thermal_temp(tz, hot_temp);  in acpi_thermal_add()
843 	acpi_trip = &tz->trips.passive.trip;  in acpi_thermal_add()
845 		passive_delay = tz->trips.passive.delay;  in acpi_thermal_add()
847 		trip->type = THERMAL_TRIP_PASSIVE;  in acpi_thermal_add()
848 		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);  in acpi_thermal_add()
849 		trip->priv = acpi_trip;  in acpi_thermal_add()
854 		acpi_trip =  &tz->trips.active[i].trip;  in acpi_thermal_add()
859 		trip->type = THERMAL_TRIP_ACTIVE;  in acpi_thermal_add()
860 		trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);  in acpi_thermal_add()
861 		trip->priv = acpi_trip;  in acpi_thermal_add()
869 						    trip - trip_table,  in acpi_thermal_add()
874 	refcount_set(&tz->thermal_check_count, 3);  in acpi_thermal_add()
875 	mutex_init(&tz->thermal_check_lock);  in acpi_thermal_add()
876 	INIT_WORK(&tz->thermal_check_work, acpi_thermal_check_fn);  in acpi_thermal_add()
878 	pr_info("%s [%s] (%ld C)\n", acpi_device_name(device),  in acpi_thermal_add()
879 		acpi_device_bid(device), deci_kelvin_to_celsius(tz->temp_dk));  in acpi_thermal_add()
881 	result = acpi_dev_install_notify_handler(device, ACPI_DEVICE_NOTIFY,  in acpi_thermal_add()
882 						 acpi_thermal_notify, device);  in acpi_thermal_add()
897 static void acpi_thermal_remove(struct acpi_device *device)  in acpi_thermal_remove()  argument
901 	if (!device || !acpi_driver_data(device))  in acpi_thermal_remove()
904 	tz = acpi_driver_data(device);  in acpi_thermal_remove()
906 	acpi_dev_remove_notify_handler(device, ACPI_DEVICE_NOTIFY,  in acpi_thermal_remove()
915 static int acpi_thermal_suspend(struct device *dev)  in acpi_thermal_suspend()
922 static int acpi_thermal_resume(struct device *dev)  in acpi_thermal_resume()
928 		return -EINVAL;  in acpi_thermal_resume()
932 		return -EINVAL;  in acpi_thermal_resume()
935 		struct acpi_thermal_trip *acpi_trip = &tz->trips.active[i].trip;  in acpi_thermal_resume()
940 		for (j = 0; j < acpi_trip->devices.count; j++) {  in acpi_thermal_resume()
941 			acpi_bus_update_power(acpi_trip->devices.handles[j],  in acpi_thermal_resume()
977 			  d->ident);  in thermal_act()
978 		act = -1;  in thermal_act()
986 		  d->ident);  in thermal_nocrt()
987 	crt = -1;  in thermal_nocrt()
995 			  d->ident);  in thermal_tzp()
1005 			  d->ident);  in thermal_psv()
1006 		psv = -1;  in thermal_psv()
1018 	 .ident = "AOpen i915GMm-HFS",
1021 		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1026 	 .ident = "AOpen i915GMm-HFS",
1029 		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1034 	 .ident = "AOpen i915GMm-HFS",
1037 		DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1042 	 .ident = "Gigabyte GA-7ZX",
1059 		return -ENODEV;  in acpi_thermal_init()
1065 		return -ENODEV;  in acpi_thermal_init()
1070 		return -ENODEV;  in acpi_thermal_init()