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Commit bf9571550f ("powerpc/powernv: Add support to clear sensor
groups data") added a mechanism to clear sensor-group data via a sysfs
interface. However, the ABI for that interface has not been
documented.
This patch documents the ABI for the sysfs interface for sensor-groups
and clearing the sensor-groups.
This patch was originally sent by Shilpasri G Bhat on the mailing list:
https://lkml.org/lkml/2018/8/1/85
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1574776274-22355-1-git-send-email-ego@linux.vnet.ibm.com
22 lines
918 B
Plaintext
22 lines
918 B
Plaintext
What: /sys/firmware/opal/sensor_groups
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Date: August 2017
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Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
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Description: Sensor groups directory for POWER9 powernv servers
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Each folder in this directory contains a sensor group
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which are classified based on type of the sensor
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like power, temperature, frequency, current, etc. They
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can also indicate the group of sensors belonging to
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different owners like CSM, Profiler, Job-Scheduler
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What: /sys/firmware/opal/sensor_groups/<sensor_group_name>/clear
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Date: August 2017
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Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
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Description: Sysfs file to clear the min-max of all the sensors
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belonging to the group.
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Writing 1 to this file will clear the minimum and
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maximum values of all the sensors in the group.
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In POWER9, the min-max of a sensor is the historical minimum
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and maximum value of the sensor cached by OCC.
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