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author | Laxman Dewangan <ldewangan@nvidia.com> | 2016-03-09 18:40:05 +0530 |
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committer | Eduardo Valentin <edubezval@gmail.com> | 2016-03-09 10:31:01 -0800 |
commit | 3a7fd9c737e2c124d20c351529316d71962cf6ca (patch) | |
tree | 6e2fc8c703001aa4e290b229903b4487c885ed20 /Documentation | |
parent | 74e5053cd71bdfe9b390000edb5a63dcf1607305 (diff) | |
download | linux-stable-3a7fd9c737e2c124d20c351529316d71962cf6ca.tar.gz linux-stable-3a7fd9c737e2c124d20c351529316d71962cf6ca.tar.bz2 linux-stable-3a7fd9c737e2c124d20c351529316d71962cf6ca.zip |
thermal: doc: Add details of thermal_zone_of_sensor_{register,unregister}
Add details of the interface thermal_zone_of_sensor_register() and
thermal_zone_of_sensor_unregister() in the thermal/sysfs-api.txt.
The details describes the functionality and parameter which
are passed to these interfaces.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/thermal/sysfs-api.txt | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index 8c745c8931da..18a3a5ea9a3c 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -72,6 +72,51 @@ temperature) and throttle appropriate devices. It deletes the corresponding entry form /sys/class/thermal folder and unbind all the thermal cooling devices it uses. +1.1.3 struct thermal_zone_device *thermal_zone_of_sensor_register( + struct device *dev, int sensor_id, void *data, + const struct thermal_zone_of_device_ops *ops) + + This interface adds a new sensor to a DT thermal zone. + This function will search the list of thermal zones described in + device tree and look for the zone that refer to the sensor device + pointed by dev->of_node as temperature providers. For the zone + pointing to the sensor node, the sensor will be added to the DT + thermal zone device. + + The parameters for this interface are: + dev: Device node of sensor containing valid node pointer in + dev->of_node. + sensor_id: a sensor identifier, in case the sensor IP has more + than one sensors + data: a private pointer (owned by the caller) that will be + passed back, when a temperature reading is needed. + ops: struct thermal_zone_of_device_ops *. + + get_temp: a pointer to a function that reads the + sensor temperature. This is mandatory + callback provided by sensor driver. + get_trend: a pointer to a function that reads the + sensor temperature trend. + set_emul_temp: a pointer to a function that sets + sensor emulated temperature. + The thermal zone temperature is provided by the get_temp() function + pointer of thermal_zone_of_device_ops. When called, it will + have the private pointer @data back. + + It returns error pointer if fails otherwise valid thermal zone device + handle. Caller should check the return handle with IS_ERR() for finding + whether success or not. + +1.1.4 void thermal_zone_of_sensor_unregister(struct device *dev, + struct thermal_zone_device *tzd) + + This interface unregisters a sensor from a DT thermal zone which was + successfully added by interface thermal_zone_of_sensor_register(). + This function removes the sensor callbacks and private data from the + thermal zone device registered with thermal_zone_of_sensor_register() + interface. It will also silent the zone by remove the .get_temp() and + get_trend() thermal zone device callbacks. + 1.2 thermal cooling device interface 1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name, void *devdata, struct thermal_cooling_device_ops *) |