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thermal: add available policies sysfs attribute

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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 <[email protected]>
Reviewed-by: Javi Merino <[email protected]>
Signed-off-by: Zhang Rui <[email protected]>
This commit is contained in:
Ni Wade 2015-07-14 15:40:56 +08:00 • committed by Zhang Rui
commit 25a0a5ce16
2 changed files with 34 additions and 0 deletions
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6
Documentation/thermal/sysfs-api.txt
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@ -180,6 +180,7 @@ Thermal zone device sys I/F, created once it's registered:
|---temp: Current temperature
|---mode: Working mode of the thermal zone
|---policy: Thermal governor used for this zone
|---available_policies: Available thermal governors for this zone
|---trip_point_[0-*]_temp: Trip point temperature
|---trip_point_[0-*]_type: Trip point type
|---trip_point_[0-*]_hyst: Hysteresis value for this trip point
@ -256,6 +257,10 @@ policy
One of the various thermal governors used for a particular zone.
RW, Required
available_policies
Available thermal governors which can be used for a particular zone.
RO, Required
trip_point_[0-*]_temp
The temperature above which trip point will be fired.
Unit: millidegree Celsius
@ -417,6 +422,7 @@ method, the sys I/F structure will be built like this:
|---temp: 37000
|---mode: enabled
|---policy: step_wise
|---available_policies: step_wise fair_share
|---trip_point_0_temp: 100000
|---trip_point_0_type: critical
|---trip_point_1_temp: 80000