260 lines
7.7 KiB
Plaintext
260 lines
7.7 KiB
Plaintext
|
What: /sys/class/thermal/thermal_zoneX/type
|
||
|
|
Description:
|
||
|
|
Strings which represent the thermal zone type.
|
||
|
|
This is given by thermal zone driver as part of registration.
|
||
|
|
E.g: "acpitz" indicates it's an ACPI thermal device.
|
||
|
|
In order to keep it consistent with hwmon sys attribute; this
|
||
|
|
shouldbe a short, lowercase string, not containing spaces nor
|
||
|
|
dashes.
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/temp
|
||
|
|
Description:
|
||
|
|
Current temperature as reported by thermal zone (sensor).
|
||
|
|
|
||
|
|
Unit: millidegree Celsius
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/mode
|
||
|
|
Description:
|
||
|
|
One of the predefined values in [enabled, disabled].
|
||
|
|
This file gives information about the algorithm that is
|
||
|
|
currently managing the thermal zone. It can be either default
|
||
|
|
kernel based algorithm or user space application.
|
||
|
|
|
||
|
|
enabled
|
||
|
|
enable Kernel Thermal management.
|
||
|
|
disabled
|
||
|
|
Preventing kernel thermal zone driver actions upon
|
||
|
|
trip points so that user application can take full
|
||
|
|
charge of the thermal management.
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/policy
|
||
|
|
Description:
|
||
|
|
One of the various thermal governors used for a particular zone.
|
||
|
|
|
||
|
|
RW, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/available_policies
|
||
|
|
Description:
|
||
|
|
Available thermal governors which can be used for a
|
||
|
|
particular zone.
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/trip_point_Y_temp
|
||
|
|
Description:
|
||
|
|
The temperature above which trip point will be fired.
|
||
|
|
|
||
|
|
Unit: millidegree Celsius
|
||
|
|
|
||
|
|
RO, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/trip_point_Y_type
|
||
|
|
Description:
|
||
|
|
Strings which indicate the type of the trip point.
|
||
|
|
|
||
|
|
E.g. it can be one of critical, hot, passive, `active[0-*]`
|
||
|
|
for ACPI thermal zone.
|
||
|
|
|
||
|
|
RO, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/trip_point_Y_hyst
|
||
|
|
Description:
|
||
|
|
The hysteresis value for a trip point, represented as an
|
||
|
|
integer.
|
||
|
|
|
||
|
|
Unit: Celsius
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/cdevY
|
||
|
|
Description:
|
||
|
|
Sysfs link to the thermal cooling device node where the sys I/F
|
||
|
|
for cooling device throttling control represents.
|
||
|
|
|
||
|
|
RO, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/cdevY_trip_point
|
||
|
|
Description:
|
||
|
|
The trip point in this thermal zone which `cdev[0-*]` is
|
||
|
|
associated with; -1 means the cooling device is not
|
||
|
|
associated with any trip point.
|
||
|
|
|
||
|
|
RO, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/cdevY_weight
|
||
|
|
Description:
|
||
|
|
The influence of `cdev[0-*]` in this thermal zone. This value
|
||
|
|
is relative to the rest of cooling devices in the thermal
|
||
|
|
zone. For example, if a cooling device has a weight double
|
||
|
|
than that of other, it's twice as effective in cooling the
|
||
|
|
thermal zone.
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/emul_temp
|
||
|
|
Description:
|
||
|
|
Interface to set the emulated temperature method in thermal zone
|
||
|
|
(sensor). After setting this temperature, the thermal zone may
|
||
|
|
pass this temperature to platform emulation function if
|
||
|
|
registered or cache it locally. This is useful in debugging
|
||
|
|
different temperature threshold and its associated cooling
|
||
|
|
action. This is write only node and writing 0 on this node
|
||
|
|
should disable emulation.
|
||
|
|
|
||
|
|
Unit: millidegree Celsius
|
||
|
|
|
||
|
|
WO, Optional
|
||
|
|
|
||
|
|
WARNING:
|
||
|
|
Be careful while enabling this option on production systems,
|
||
|
|
because userland can easily disable the thermal policy by simply
|
||
|
|
flooding this sysfs node with low temperature values.
|
||
|
|
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/k_d
|
||
|
|
Description:
|
||
|
|
The derivative term of the power allocator governor's PID
|
||
|
|
controller. For more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/k_i
|
||
|
|
Description:
|
||
|
|
The integral term of the power allocator governor's PID
|
||
|
|
controller. This term allows the PID controller to compensate
|
||
|
|
for long term drift. For more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/k_po
|
||
|
|
Description:
|
||
|
|
The proportional term of the power allocator governor's PID
|
||
|
|
controller during temperature overshoot. Temperature overshoot
|
||
|
|
is when the current temperature is above the "desired
|
||
|
|
temperature" trip point. For more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/k_pu
|
||
|
|
Description:
|
||
|
|
The proportional term of the power allocator governor's PID
|
||
|
|
controller during temperature undershoot. Temperature undershoot
|
||
|
|
is when the current temperature is below the "desired
|
||
|
|
temperature" trip point. For more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/integral_cutoff
|
||
|
|
Description:
|
||
|
|
Temperature offset from the desired temperature trip point
|
||
|
|
above which the integral term of the power allocator
|
||
|
|
governor's PID controller starts accumulating errors. For
|
||
|
|
example, if integral_cutoff is 0, then the integral term only
|
||
|
|
accumulates error when temperature is above the desired
|
||
|
|
temperature trip point. For more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
Unit: millidegree Celsius
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/slope
|
||
|
|
Description:
|
||
|
|
The slope constant used in a linear extrapolation model
|
||
|
|
to determine a hotspot temperature based off the sensor's
|
||
|
|
raw readings. It is up to the device driver to determine
|
||
|
|
the usage of these values.
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/offset
|
||
|
|
Description:
|
||
|
|
The offset constant used in a linear extrapolation model
|
||
|
|
to determine a hotspot temperature based off the sensor's
|
||
|
|
raw readings. It is up to the device driver to determine
|
||
|
|
the usage of these values.
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/thermal_zoneX/sustainable_power
|
||
|
|
Description:
|
||
|
|
An estimate of the sustained power that can be dissipated by
|
||
|
|
the thermal zone. Used by the power allocator governor. For
|
||
|
|
more information see
|
||
|
|
Documentation/driver-api/thermal/power_allocator.rst
|
||
|
|
|
||
|
|
Unit: milliwatts
|
||
|
|
|
||
|
|
RW, Optional
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/type
|
||
|
|
Description:
|
||
|
|
String which represents the type of device, e.g:
|
||
|
|
|
||
|
|
- for generic ACPI: should be "Fan", "Processor" or "LCD"
|
||
|
|
- for memory controller device on intel_menlow platform:
|
||
|
|
should be "Memory controller".
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/max_state
|
||
|
|
Description:
|
||
|
|
The maximum permissible cooling state of this cooling device.
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/cur_state
|
||
|
|
Description:
|
||
|
|
The current cooling state of this cooling device.
|
||
|
|
The value can any integer numbers between 0 and max_state:
|
||
|
|
|
||
|
|
- cur_state == 0 means no cooling
|
||
|
|
- cur_state == max_state means the maximum cooling.
|
||
|
|
|
||
|
|
RW, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/stats/reset
|
||
|
|
Description:
|
||
|
|
Writing any value resets the cooling device's statistics.
|
||
|
|
|
||
|
|
WO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/stats/time_in_state_ms:
|
||
|
|
Description:
|
||
|
|
The amount of time spent by the cooling device in various
|
||
|
|
cooling states. The output will have "<state> <time>" pair
|
||
|
|
in each line, which will mean this cooling device spent <time>
|
||
|
|
msec of time at <state>.
|
||
|
|
|
||
|
|
Output will have one line for each of the supported states.
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/stats/total_trans
|
||
|
|
Description:
|
||
|
|
A single positive value showing the total number of times
|
||
|
|
the state of a cooling device is changed.
|
||
|
|
|
||
|
|
RO, Required
|
||
|
|
|
||
|
|
What: /sys/class/thermal/cooling_deviceX/stats/trans_table
|
||
|
|
Description:
|
||
|
|
This gives fine grained information about all the cooling state
|
||
|
|
transitions. The cat output here is a two dimensional matrix,
|
||
|
|
where an entry <i,j> (row i, column j) represents the number
|
||
|
|
of transitions from State_i to State_j. If the transition
|
||
|
|
table is bigger than PAGE_SIZE, reading this will return
|
||
|
|
an -EFBIG error.
|
||
|
|
|
||
|
|
RO, Required
|