1 // SPDX-License-Identifier: GPL-2.0
3  *  thermal_helpers.c - helper functions to handle thermal devices
29 	if (tz->emul_temperature || !tz->ops.get_trend ||  in get_tz_trend()
30 	    tz->ops.get_trend(tz, trip, &trend)) {  in get_tz_trend()
31 		if (tz->temperature > tz->last_temperature)  in get_tz_trend()
33 		else if (tz->temperature < tz->last_temperature)  in get_tz_trend()
49 	list_for_each_entry(ti, &td->thermal_instances, trip_node) {  in thermal_instance_present()
50 		if (ti->cdev == cdev)  in thermal_instance_present()
69  * __thermal_zone_get_temp() - returns the temperature of a thermal zone
73  * When a valid thermal zone reference is passed, it will fetch its
76  * Both tz and tz->ops must be valid pointers when calling this function,
77  * and the tz->ops.get_temp callback must be provided.
78  * The function must be called under tz->lock.
86 	int ret = -EINVAL;  in __thermal_zone_get_temp()
88 	lockdep_assert_held(&tz->lock);  in __thermal_zone_get_temp()
90 	ret = tz->ops.get_temp(tz, temp);  in __thermal_zone_get_temp()
92 	if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) {  in __thermal_zone_get_temp()
94 			const struct thermal_trip *trip = &td->trip;  in __thermal_zone_get_temp()
96 			if (trip->type == THERMAL_TRIP_CRITICAL) {  in __thermal_zone_get_temp()
97 				crit_temp = trip->temperature;  in __thermal_zone_get_temp()
108 			*temp = tz->emul_temperature;  in __thermal_zone_get_temp()
112 		dev_dbg(&tz->device, "Failed to get temperature: %d\n", ret);  in __thermal_zone_get_temp()
118  * thermal_zone_get_temp() - returns the temperature of a thermal zone
122  * When a valid thermal zone reference is passed, it will fetch its
132 		return -EINVAL;  in thermal_zone_get_temp()
136 	if (!tz->ops.get_temp)  in thermal_zone_get_temp()
137 		return -EINVAL;  in thermal_zone_get_temp()
141 		return -ENODATA;  in thermal_zone_get_temp()
152 	 * No check is needed for the ops->set_cur_state as the  in thermal_cdev_set_cur_state()
155 	ret = cdev->ops->set_cur_state(cdev, state);  in thermal_cdev_set_cur_state()
172 	list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {  in __thermal_cdev_update()
173 		if (instance->target == THERMAL_NO_TARGET)  in __thermal_cdev_update()
175 		if (instance->target > target)  in __thermal_cdev_update()
176 			target = instance->target;  in __thermal_cdev_update()
182 	dev_dbg(&cdev->device, "set to state %lu\n", target);  in __thermal_cdev_update()
186  * thermal_cdev_update - update cooling device state if needed
195 	if (!cdev->updated) {  in thermal_cdev_update()
197 		cdev->updated = true;  in thermal_cdev_update()
202  * thermal_cdev_update_nocheck() - Unconditionally update cooling device state
213  * thermal_zone_get_slope - return the slope attribute of the thermal zone
214  * @tz: thermal zone device with the slope attribute
216  * Return: If the thermal zone device has a slope attribute, return it, else
221 	if (tz && tz->tzp)  in thermal_zone_get_slope()
222 		return tz->tzp->slope;  in thermal_zone_get_slope()
228  * thermal_zone_get_offset - return the offset attribute of the thermal zone
229  * @tz: thermal zone device with the offset attribute
231  * Return: If the thermal zone device has a offset attribute, return it, else
236 	if (tz && tz->tzp)  in thermal_zone_get_offset()
237 		return tz->tzp->offset;  in thermal_zone_get_offset()