ACPI: thermal: syntax, spelling, kernel-doc
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Len Brown <len.brown@intel.com>
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Len Brown
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543a956140
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@ -14,7 +14,7 @@ The generic thermal sysfs provides a set of interfaces for thermal zone devices
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and thermal cooling devices (fan, processor...) to register with the thermal management
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solution and to be a part of it.
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This how-to focusses on enabling new thermal zone and cooling devices to participate
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This how-to focuses on enabling new thermal zone and cooling devices to participate
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in thermal management.
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This solution is platform independent and any type of thermal zone devices and
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cooling devices should be able to make use of the infrastructure.
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@ -41,9 +41,9 @@ and throttle appropriate devices.
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name: the thermal zone name.
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trips: the total number of trip points this thermal zone supports.
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devdata: device private data
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ops: thermal zone device callbacks.
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ops: thermal zone device call-backs.
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.bind: bind the thermal zone device with a thermal cooling device.
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.unbind: unbing the thermal zone device with a thermal cooling device.
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.unbind: unbind the thermal zone device with a thermal cooling device.
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.get_temp: get the current temperature of the thermal zone.
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.get_mode: get the current mode (user/kernel) of the thermal zone.
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"kernel" means thermal management is done in kernel.
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@ -69,7 +69,7 @@ and throttle appropriate devices.
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It tries to bind itself to all the thermal zone devices register at the same time.
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name: the cooling device name.
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devdata: device private data.
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ops: thermal cooling devices callbacks.
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ops: thermal cooling devices call-backs.
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.get_max_state: get the Maximum throttle state of the cooling device.
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.get_cur_state: get the Current throttle state of the cooling device.
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.set_cur_state: set the Current throttle state of the cooling device.
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@ -109,7 +109,6 @@ RO read only value
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RW read/write value
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All thermal sysfs attributes will be represented under /sys/class/thermal
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/sys/class/thermal/
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Thermal zone device sys I/F, created once it's registered:
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|thermal_zone[0-*]:
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@ -129,7 +128,7 @@ Thermal cooling device sys I/F, created once it's registered:
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These two dynamic attributes are created/removed in pairs.
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They represent the relationship between a thermal zone and its associated cooling device.
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They are created/removed for each
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thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful exection.
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thermal_zone_bind_cooling_device/thermal_zone_unbind_cooling_device successful execution.
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|thermal_zone[0-*]
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|-----cdev[0-*]: The [0-*]th cooling device in the current thermal zone
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@ -147,11 +146,11 @@ type Strings which represent the thermal zone type.
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Optional
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temp Current temperature as reported by thermal zone (sensor)
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Unit: degree celsius
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Unit: degree Celsius
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RO
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Required
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mode One of the predifned values in [kernel, user]
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mode One of the predefined values in [kernel, user]
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This file gives information about the algorithm
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that is currently managing the thermal zone.
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It can be either default kernel based algorithm
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@ -164,12 +163,12 @@ mode One of the predifned values in [kernel, user]
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charge of the thermal management.
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trip_point_[0-*]_temp The temperature above which trip point will be fired
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Unit: degree celsius
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Unit: degree Celsius
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RO
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Optional
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trip_point_[0-*]_type Strings which indicate the type of the trip point
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Eg. it can be one of critical, hot, passive,
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E.g. it can be one of critical, hot, passive,
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active[0-*] for ACPI thermal zone.
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RO
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Optional
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@ -179,7 +178,7 @@ cdev[0-*] Sysfs link to the thermal cooling device node where the sys I/F
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RO
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Optional
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cdev[0-*]_trip_point The trip point with which cdev[0-*] is assocated in this thermal zone
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cdev[0-*]_trip_point The trip point with which cdev[0-*] is associated in this thermal zone
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-1 means the cooling device is not associated with any trip point.
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RO
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Optional
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@ -211,7 +210,7 @@ cur_state The current cooling state of this cooling device.
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ACPI thermal zone may support multiple trip points like critical/hot/passive/active.
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If an ACPI thermal zone supports critical, passive, active[0] and active[1] at the same time,
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it may register itself as a thermale_zone_device (thermal_zone1) with 4 trip points in all.
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it may register itself as a thermal_zone_device (thermal_zone1) with 4 trip points in all.
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It has one processor and one fan, which are both registered as thermal_cooling_device.
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If the processor is listed in _PSL method, and the fan is listed in _AL0 method,
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the sys I/F structure will be built like this:
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@ -9,7 +9,7 @@ menuconfig THERMAL
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Generic Thermal Sysfs driver offers a generic mechanism for
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thermal management. Usually it's made up of one or more thermal
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zone and cooling device.
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each thermal zone contains its own temperature, trip points,
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Each thermal zone contains its own temperature, trip points,
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cooling devices.
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All platforms with ACPI thermal support can use this driver.
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If you want this support, you should say Y here
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If you want this support, you should say Y here.
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@ -267,7 +267,7 @@ thermal_cooling_device_cur_state_store(struct device *dev,
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}
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static struct device_attribute dev_attr_cdev_type =
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__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
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__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
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static DEVICE_ATTR(max_state, 0444,
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thermal_cooling_device_max_state_show, NULL);
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static DEVICE_ATTR(cur_state, 0644,
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@ -276,7 +276,7 @@ static DEVICE_ATTR(cur_state, 0644,
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static ssize_t
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thermal_cooling_device_trip_point_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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struct device_attribute *attr, char *buf)
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{
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struct thermal_cooling_device_instance *instance;
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@ -293,11 +293,12 @@ thermal_cooling_device_trip_point_show(struct device *dev,
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/**
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* thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
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* this function is usually called in the thermal zone device .bind callback.
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* @tz: thermal zone device
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* @trip: indicates which trip point the cooling devices is
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* associated with in this thermal zone.
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* @cdev: thermal cooling device
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*
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* This function is usually called in the thermal zone device .bind callback.
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*/
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int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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int trip,
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@ -307,8 +308,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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struct thermal_cooling_device_instance *pos;
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int result;
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if (trip >= tz->trips ||
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(trip < 0 && trip != THERMAL_TRIPS_NONE))
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if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
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return -EINVAL;
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if (!tz || !cdev)
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@ -361,15 +361,17 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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kfree(dev);
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return result;
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}
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EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
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/**
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* thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
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* this function is usually called in the thermal zone device .unbind callback.
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* @tz: thermal zone device
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* @trip: indicates which trip point the cooling devices is
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* associated with in this thermal zone.
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* @cdev: thermal cooling device
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*
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* This function is usually called in the thermal zone device .unbind callback.
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*/
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int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
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int trip,
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@ -379,8 +381,7 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
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mutex_lock(&tz->lock);
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list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
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if (pos->tz == tz && pos->trip == trip
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&& pos->cdev == cdev) {
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if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
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list_del(&pos->node);
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mutex_unlock(&tz->lock);
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goto unbind;
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@ -397,6 +398,7 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
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kfree(pos);
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return 0;
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}
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EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
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static void thermal_release(struct device *dev)
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@ -425,7 +427,10 @@ static struct class thermal_class = {
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* @ops: standard thermal cooling devices callbacks.
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*/
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struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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void *devdata, struct thermal_cooling_device_ops *ops)
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void *devdata,
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struct
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thermal_cooling_device_ops
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*ops)
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{
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struct thermal_cooling_device *cdev;
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struct thermal_zone_device *pos;
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@ -435,7 +440,7 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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return NULL;
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if (!ops || !ops->get_max_state || !ops->get_cur_state ||
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!ops->set_cur_state)
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!ops->set_cur_state)
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return NULL;
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cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
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@ -462,8 +467,7 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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/* sys I/F */
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if (type) {
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result = device_create_file(&cdev->device,
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&dev_attr_cdev_type);
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result = device_create_file(&cdev->device, &dev_attr_cdev_type);
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if (result)
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goto unregister;
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}
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@ -496,11 +500,11 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *type,
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device_unregister(&cdev->device);
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return NULL;
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}
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EXPORT_SYMBOL(thermal_cooling_device_register);
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/**
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* thermal_cooling_device_unregister - removes the registered thermal cooling device
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*
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* @cdev: the thermal cooling device to remove.
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*
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* thermal_cooling_device_unregister() must be called when the device is no
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@ -533,8 +537,7 @@ void thermal_cooling_device_unregister(struct
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}
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mutex_unlock(&thermal_list_lock);
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if (cdev->type[0])
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device_remove_file(&cdev->device,
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&dev_attr_cdev_type);
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device_remove_file(&cdev->device, &dev_attr_cdev_type);
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device_remove_file(&cdev->device, &dev_attr_max_state);
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device_remove_file(&cdev->device, &dev_attr_cur_state);
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@ -542,6 +545,7 @@ void thermal_cooling_device_unregister(struct
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device_unregister(&cdev->device);
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return;
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}
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EXPORT_SYMBOL(thermal_cooling_device_unregister);
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/**
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@ -555,8 +559,10 @@ EXPORT_SYMBOL(thermal_cooling_device_unregister);
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* longer needed.
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*/
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struct thermal_zone_device *thermal_zone_device_register(char *type,
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int trips, void *devdata,
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struct thermal_zone_device_ops *ops)
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int trips,
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void *devdata, struct
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thermal_zone_device_ops
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*ops)
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{
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struct thermal_zone_device *tz;
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struct thermal_cooling_device *pos;
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@ -625,9 +631,9 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
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list_add_tail(&tz->node, &thermal_tz_list);
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if (ops->bind)
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list_for_each_entry(pos, &thermal_cdev_list, node) {
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result = ops->bind(tz, pos);
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if (result)
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break;
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result = ops->bind(tz, pos);
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if (result)
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break;
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}
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mutex_unlock(&thermal_list_lock);
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@ -639,11 +645,11 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
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device_unregister(&tz->device);
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return NULL;
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}
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EXPORT_SYMBOL(thermal_zone_device_register);
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/**
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* thermal_device_unregister - removes the registered thermal zone device
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*
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* @tz: the thermal zone device to remove
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*/
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void thermal_zone_device_unregister(struct thermal_zone_device *tz)
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@ -685,6 +691,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
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device_unregister(&tz->device);
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return;
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}
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EXPORT_SYMBOL(thermal_zone_device_unregister);
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static int __init thermal_init(void)
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