kernel.git/Documentation/thermal/sysfs-api.txt, branch linux-4.15.y

thermal: core: Add a back up thermal shutdown mechanism

2017-05-05T08:01:45Z

orderly_poweroff is triggered when a graceful shutdown of system is desired. This may be used in many critical states of the kernel such as when subsystems detects conditions such as critical temperature conditions. However, in certain conditions in system boot up sequences like those in the middle of driver probes being initiated, userspace will be unable to power off the system in a clean manner and leaves the system in a critical state. In cases like these, the /sbin/poweroff will return success (having forked off to attempt powering off the system. However, the system overall will fail to completely poweroff (since other modules will be probed) and the system is still functional with no userspace (since that would have shut itself off). However, there is no clean way of detecting such failure of userspace powering off the system. In such scenarios, it is necessary for a backup workqueue to be able to force a shutdown of the system when orderly shutdown is not successful after a configurable time period. Reported-by: Nishanth Menon Signed-off-by: Keerthy Acked-by: Eduardo Valentin Signed-off-by: Zhang Rui

thermal: Add support for hardware-tracked trip points

2016-09-27T06:02:16Z

This adds support for hardware-tracked trip points to the device tree thermal sensor framework. The framework supports an arbitrary number of trip points. Whenever the current temperature is updated, the trip points immediately below and above the current temperature are found. A .set_trips callback is then called with the temperatures. If there is no trip point above or below the current temperature, the passed trip temperature will be -INT_MAX or INT_MAX respectively. In this callback, the driver should program the hardware such that it is notified when either of these trip points are triggered. When a trip point is triggered, the driver should call `thermal_zone_device_update' for the respective thermal zone. This will cause the trip points to be updated again. If .set_trips is not implemented, the framework behaves as before. This patch is based on an earlier version from Mikko Perttunen Signed-off-by: Sascha Hauer Signed-off-by: Caesar Wang Cc: Zhang Rui Cc: Eduardo Valentin Cc: linux-pm@vger.kernel.org Reviewed-by: Javi Merino Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui

thermal: core: export apis to get slope and offset

2016-09-27T06:02:16Z

Add apis for platform thermal drivers to query for slope and offset attributes, which might be needed for temperature calculations. Signed-off-by: Rajendra Nayak Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui

thermal: Syntactic and factual errors in the API document

2016-05-17T14:28:24Z

There are several places where the English in the document is syntactically invalid, or unclear. There are also one or two factual errors. Reviewed-by: Durgadoss R Signed-off-by: Andy Champ Signed-off-by: Eduardo Valentin

thermal: doc: Add details of devm_thermal_zone_of_sensor_{register,unregister}

2016-03-09T18:51:41Z

Add details of the interface devm_thermal_zone_of_sensor_register() and devm_thermal_zone_of_sensor_unregister() in the . Signed-off-by: Laxman Dewangan Signed-off-by: Eduardo Valentin

thermal: doc: Add details of thermal_zone_of_sensor_{register,unregister}

2016-03-09T18:31:01Z

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 Signed-off-by: Eduardo Valentin

thermal: add description for integral_cutoff unit

2016-01-14T20:29:08Z

Add more explicitly description for unit of integral_cutoff which used by power allocator governor. Signed-off-by: Leo Yan Acked-by: Javi Merino Signed-off-by: Jonathan Corbet

thermal: add available policies sysfs attribute

2015-08-03T15:15:50Z

The Linux thermal framework support to change thermal governor policy in userspace, but it can't show what available policies supported. This patch adds available_policies attribute to the thermal framework, it can list the thermal governors which can be used for a particular zone. This attribute is read only. Signed-off-by: Wei Ni Reviewed-by: Javi Merino Signed-off-by: Zhang Rui

thermal: support slope and offset coefficients

2015-05-12T02:46:52Z

It is common to have a linear extrapolation from the current sensor readings and the actual temperature value. This is specially the case when the sensor is in use to extrapolate hotspots. This patch adds slope and offset constants for single sensor linear extrapolation equation. Because the same sensor can be use in different locations, from board to board, these constants are added as part of thermal_zone_params. The constants are available through sysfs. It is up to the device driver to determine the usage of these values. Signed-off-by: Eduardo Valentin

thermal: export thermal_zone_parameters to sysfs

2015-05-05T04:27:54Z

It's useful for tuning to be able to edit thermal_zone_parameters from userspace. Export them to the thermal_zone sysfs so that they can be easily changed. Cc: Zhang Rui Cc: Eduardo Valentin Signed-off-by: Javi Merino Signed-off-by: Eduardo Valentin