diff options
Diffstat (limited to 'drivers/thermal/thermal_core.c')
-rw-r--r-- | drivers/thermal/thermal_core.c | 143 |
1 files changed, 32 insertions, 111 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index c6d74bc1c90b..4a291d205d5c 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -380,6 +380,25 @@ static void thermal_emergency_poweroff(void) msecs_to_jiffies(poweroff_delay_ms)); } +void thermal_zone_device_critical(struct thermal_zone_device *tz) +{ + dev_emerg(&tz->device, "%s: critical temperature reached, " + "shutting down\n", tz->type); + + mutex_lock(&poweroff_lock); + if (!power_off_triggered) { + /* + * Queue a backup emergency shutdown in the event of + * orderly_poweroff failure + */ + thermal_emergency_poweroff(); + orderly_poweroff(true); + power_off_triggered = true; + } + mutex_unlock(&poweroff_lock); +} +EXPORT_SYMBOL(thermal_zone_device_critical); + static void handle_critical_trips(struct thermal_zone_device *tz, int trip, enum thermal_trip_type trip_type) { @@ -396,22 +415,10 @@ static void handle_critical_trips(struct thermal_zone_device *tz, if (tz->ops->notify) tz->ops->notify(tz, trip, trip_type); - if (trip_type == THERMAL_TRIP_CRITICAL) { - dev_emerg(&tz->device, - "critical temperature reached (%d C), shutting down\n", - tz->temperature / 1000); - mutex_lock(&poweroff_lock); - if (!power_off_triggered) { - /* - * Queue a backup emergency shutdown in the event of - * orderly_poweroff failure - */ - thermal_emergency_poweroff(); - orderly_poweroff(true); - power_off_triggered = true; - } - mutex_unlock(&poweroff_lock); - } + if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot) + tz->ops->hot(tz); + else if (trip_type == THERMAL_TRIP_CRITICAL) + tz->ops->critical(tz); } static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) @@ -553,7 +560,8 @@ void thermal_zone_device_update(struct thermal_zone_device *tz, if (atomic_read(&in_suspend)) return; - if (!tz->ops->get_temp) + if (WARN_ONCE(!tz->ops->get_temp, "'%s' must not be called without " + "'get_temp' ops set\n", __func__)) return; update_temperature(tz); @@ -593,94 +601,6 @@ static void thermal_zone_device_check(struct work_struct *work) thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); } -/* - * Power actor section: interface to power actors to estimate power - * - * Set of functions used to interact to cooling devices that know - * how to estimate their devices power consumption. - */ - -/** - * power_actor_get_max_power() - get the maximum power that a cdev can consume - * @cdev: pointer to &thermal_cooling_device - * @max_power: pointer in which to store the maximum power - * - * Calculate the maximum power consumption in milliwats that the - * cooling device can currently consume and store it in @max_power. - * - * Return: 0 on success, -EINVAL if @cdev doesn't support the - * power_actor API or -E* on other error. - */ -int power_actor_get_max_power(struct thermal_cooling_device *cdev, - u32 *max_power) -{ - if (!cdev_is_power_actor(cdev)) - return -EINVAL; - - return cdev->ops->state2power(cdev, 0, max_power); -} - -/** - * power_actor_get_min_power() - get the mainimum power that a cdev can consume - * @cdev: pointer to &thermal_cooling_device - * @min_power: pointer in which to store the minimum power - * - * Calculate the minimum power consumption in milliwatts that the - * cooling device can currently consume and store it in @min_power. - * - * Return: 0 on success, -EINVAL if @cdev doesn't support the - * power_actor API or -E* on other error. - */ -int power_actor_get_min_power(struct thermal_cooling_device *cdev, - u32 *min_power) -{ - unsigned long max_state; - int ret; - - if (!cdev_is_power_actor(cdev)) - return -EINVAL; - - ret = cdev->ops->get_max_state(cdev, &max_state); - if (ret) - return ret; - - return cdev->ops->state2power(cdev, max_state, min_power); -} - -/** - * power_actor_set_power() - limit the maximum power a cooling device consumes - * @cdev: pointer to &thermal_cooling_device - * @instance: thermal instance to update - * @power: the power in milliwatts - * - * Set the cooling device to consume at most @power milliwatts. The limit is - * expected to be a cap at the maximum power consumption. - * - * Return: 0 on success, -EINVAL if the cooling device does not - * implement the power actor API or -E* for other failures. - */ -int power_actor_set_power(struct thermal_cooling_device *cdev, - struct thermal_instance *instance, u32 power) -{ - unsigned long state; - int ret; - - if (!cdev_is_power_actor(cdev)) - return -EINVAL; - - ret = cdev->ops->power2state(cdev, power, &state); - if (ret) - return ret; - - instance->target = state; - mutex_lock(&cdev->lock); - cdev->updated = false; - mutex_unlock(&cdev->lock); - thermal_cdev_update(cdev); - - return 0; -} - void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, const char *cdev_type, size_t size) { @@ -1423,6 +1343,10 @@ thermal_zone_device_register(const char *type, int trips, int mask, tz->id = id; strlcpy(tz->type, type, sizeof(tz->type)); + + if (!ops->critical) + ops->critical = thermal_zone_device_critical; + tz->ops = ops; tz->tzp = tzp; tz->device.class = &thermal_class; @@ -1446,12 +1370,9 @@ thermal_zone_device_register(const char *type, int trips, int mask, goto release_device; for (count = 0; count < trips; count++) { - if (tz->ops->get_trip_type(tz, count, &trip_type)) - set_bit(count, &tz->trips_disabled); - if (tz->ops->get_trip_temp(tz, count, &trip_temp)) - set_bit(count, &tz->trips_disabled); - /* Check for bogus trip points */ - if (trip_temp == 0) + if (tz->ops->get_trip_type(tz, count, &trip_type) || + tz->ops->get_trip_temp(tz, count, &trip_temp) || + !trip_temp) set_bit(count, &tz->trips_disabled); } |