linux.git/Documentation/thermal, branch v4.8 Linux kernel source tree Doc: PM: Fix a typo in intel_powerclamp.txt 2016-06-30T19:05:40+00:00 Masanari Iida standby24x7@gmail.com 2016-06-29T09:05:56+00:00 05d0066a5787189bb31a5808c1e9b3157561c184 This patch fix a spelling typo in intel_powerclamp.txt Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
This patch fix a spelling typo in intel_powerclamp.txt

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
thermal: Syntactic and factual errors in the API document 2016-05-17T14:28:24+00:00 Andy Champ andycham@amazon.com 2016-03-22T12:37:25+00:00 c212ed912b73f804d5f897ec0a84f58dfd3da9e1 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 <durgadoss.r@intel.com> Signed-off-by: Andy Champ <andycham@amazon.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> 
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 <durgadoss.r@intel.com>
Signed-off-by: Andy Champ <andycham@amazon.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
thermal: doc: Add details of devm_thermal_zone_of_sensor_{register,unregister} 2016-03-09T18:51:41+00:00 Laxman Dewangan ldewangan@nvidia.com 2016-03-09T13:10:08+00:00 61f846f37354fd294f3172845d9fec2c03f60a45 Add details of the interface devm_thermal_zone_of_sensor_register() and devm_thermal_zone_of_sensor_unregister() in the <thermal/sysfs-api.txt>. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> 
Add details of the interface devm_thermal_zone_of_sensor_register()
and devm_thermal_zone_of_sensor_unregister() in the
<thermal/sysfs-api.txt>.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
thermal: doc: Add details of thermal_zone_of_sensor_{register,unregister} 2016-03-09T18:31:01+00:00 Laxman Dewangan ldewangan@nvidia.com 2016-03-09T13:10:05+00:00 3a7fd9c737e2c124d20c351529316d71962cf6ca 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> 
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>
thermal: add description for integral_cutoff unit 2016-01-14T20:29:08+00:00 Leo Yan leo.yan@linaro.org 2016-01-13T07:21:05+00:00 ec3fc58b1e7a32cc9f552b306f8dbb4454e83798 Add more explicitly description for unit of integral_cutoff which used by power allocator governor. Signed-off-by: Leo Yan <leo.yan@linaro.org> Acked-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> 
Add more explicitly description for unit of integral_cutoff which used
by power allocator governor.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
thermal: power_allocator: relax the requirement of two passive trip points 2015-09-14T14:41:45+00:00 Javi Merino javi.merino@arm.com 2015-09-14T13:23:52+00:00 8b7b390f805f09ff252351468a79ebabde1ab55a The power allocator governor currently requires that the thermal zone has at least two passive trip points. If there aren't, the governor refuses to bind to the thermal zone. This commit relaxes that requirement. Now the governor will bind to all thermal zones regardless of how many trip points they have. Cc: Zhang Rui <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> 
The power allocator governor currently requires that the thermal zone
has at least two passive trip points.  If there aren't, the governor
refuses to bind to the thermal zone.

This commit relaxes that requirement.  Now the governor will bind to all
thermal zones regardless of how many trip points they have.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
thermal: add available policies sysfs attribute 2015-08-03T15:15:50+00:00 Ni Wade wni@nvidia.com 2015-07-14T07:40:56+00:00 25a0a5ce16ecd7e60c4cf1436892433873e9d99d 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 <wni@nvidia.com> Reviewed-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> 
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 <wni@nvidia.com>
Reviewed-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
thermal: support slope and offset coefficients 2015-05-12T02:46:52+00:00 Eduardo Valentin edubezval@gmail.com 2015-05-12T02:34:23+00:00 9d0be7f4810257a9b0fc78fff641f14409f14ab3 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 <edubezval@gmail.com> 
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 <edubezval@gmail.com>
thermal: export thermal_zone_parameters to sysfs 2015-05-05T04:27:54+00:00 Javi Merino javi.merino@arm.com 2015-03-26T15:53:02+00:00 9f38271c6f82a577d9fdab27aaf2e1c55ae5cf73 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 <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> 
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 <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
thermal: introduce the Power Allocator governor 2015-05-05T04:27:52+00:00 Javi Merino javi.merino@arm.com 2015-03-02T17:17:19+00:00 6b775e870c56c59c3e16531ea2307b797395f9f7 The power allocator governor is a thermal governor that controls system and device power allocation to control temperature. Conceptually, the implementation divides the sustainable power of a thermal zone among all the heat sources in that zone. This governor relies on "power actors", entities that represent heat sources. They can report current and maximum power consumption and can set a given maximum power consumption, usually via a cooling device. The governor uses a Proportional Integral Derivative (PID) controller driven by the temperature of the thermal zone. The output of the controller is a power budget that is then allocated to each power actor that can have bearing on the temperature we are trying to control. It decides how much power to give each cooling device based on the performance they are requesting. The PID controller ensures that the total power budget does not exceed the control temperature. Cc: Zhang Rui <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> 
The power allocator governor is a thermal governor that controls system
and device power allocation to control temperature.  Conceptually, the
implementation divides the sustainable power of a thermal zone among
all the heat sources in that zone.

This governor relies on "power actors", entities that represent heat
sources.  They can report current and maximum power consumption and
can set a given maximum power consumption, usually via a cooling
device.

The governor uses a Proportional Integral Derivative (PID) controller
driven by the temperature of the thermal zone.  The output of the
controller is a power budget that is then allocated to each power
actor that can have bearing on the temperature we are trying to
control.  It decides how much power to give each cooling device based
on the performance they are requesting.  The PID controller ensures
that the total power budget does not exceed the control temperature.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>