linux-toradex.git/drivers/thermal/thermal_core.h, branch v4.9.78

Thermal: initialize thermal zone device correctly

2015-12-29T07:59:44+00:00

After thermal zone device registered, as we have not read any
temperature before, thus tz->temperature should not be 0,
which actually means 0C, and thermal trend is not available.
In this case, we need specially handling for the first
thermal_zone_device_update().

Both thermal core framework and step_wise governor is
enhanced to handle this. And since the step_wise governor
is the only one that uses trends, so it's the only thermal
governor that needs to be updated.

CC:  #3.18+
Tested-by: Manuel Krause 
Tested-by: szegad 
Tested-by: prash 
Tested-by: amish 
Tested-by: Matthias 
Reviewed-by: Javi Merino 
Signed-off-by: Zhang Rui 
Signed-off-by: Chen Yu

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc

2015-06-11T02:55:42+00:00

thermal: introduce the Power Allocator governor

2015-05-05T04:27:52+00:00

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 
Cc: Eduardo Valentin 
Signed-off-by: Punit Agrawal 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: export weight to sysfs

2015-05-05T04:27:51+00:00

It's useful to have access to the weights for the cooling devices for
thermal zones and change them if needed.  Export them to sysfs.

Cc: Zhang Rui 
Cc: Eduardo Valentin 
Signed-off-by: Javi Merino 
Signed-off-by: Eduardo Valentin

thermal: of: fix cooling device weights in device tree

2015-05-05T04:27:50+00:00

Currently you can specify the weight of the cooling device in the device
tree but that information is not populated to the
thermal_bind_params where the fair share governor expects it to
be.  The of thermal zone device doesn't have a thermal_bind_params
structure and arguably it's better to pass the weight inside the
thermal_instance as it is specific to the bind of a cooling device to a
thermal zone parameter.

Core thermal code is fixed to populate the weight in the instance from
the thermal_bind_params, so platform code that was passing the weight
inside the thermal_bind_params continue to work seamlessly.

While we are at it, create a default value for the weight parameter for
those thermal zones that currently don't define it and remove the
hardcoded default in of-thermal.

Cc: Zhang Rui 
Cc: "Rafael J. Wysocki" 
Cc: Len Brown 
Cc: Peter Feuerer 
Cc: Darren Hart 
Cc: Eduardo Valentin 
Cc: Kukjin Kim 
Cc: Durgadoss R 
Signed-off-by: Kapileshwar Singh 
Signed-off-by: Eduardo Valentin

thermal: Use bool function return values of true/false not 1/0

2015-05-01T05:22:34+00:00

Use the normal return values for bool functions

Signed-off-by: Joe Perches 
Signed-off-by: Zhang Rui

thermal: of: Remove bogus type qualifier for of_thermal_get_trip_points()

2015-01-05T20:03:22+00:00

With gcc 4.1.2, 4.2, and 4.2.4 (4.4 and later are OK):

drivers/thermal/thermal_core.h:110: warning: type qualifiers ignored on function return type

Signed-off-by: Geert Uytterhoeven 
Fixes: ce8be7785922de0e ("thermal: of: Extend of-thermal to export table of trip points")
Signed-off-by: Eduardo Valentin

thermal: of: Extend of-thermal to export table of trip points

2014-12-08T19:58:01+00:00

This patch extends the of-thermal.c to export trip points for a given
thermal zone.

Thermal drivers should use of_thermal_get_trip_points() method to get
pointer to table of thermal trip points.

Signed-off-by: Lukasz Majewski 
Signed-off-by: Eduardo Valentin

thermal: of: Extend of-thermal.c to provide check if trip point is valid

2014-12-08T19:45:29+00:00

This patch extends the of-thermal.c to provide check if trip point is
valid.

Signed-off-by: Lukasz Majewski 
Signed-off-by: Eduardo Valentin

thermal: of: Extend of-thermal.c to provide number of trip points

2014-12-08T19:38:32+00:00

This patch extends the of-thermal.c to provide information about number of
available trip points.

Signed-off-by: Lukasz Majewski 
Signed-off-by: Eduardo Valentin