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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2019-11-26 14:51:14 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-04-01 05:30:50 +0200 |
| commit | 32377bd2cbb62e23ac0a1aaaf0048957c5fd9f02 (patch) | |
| tree | 1df5e21b88efd2c2a259fbe238c59127b48da945 /Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups | |
| parent | selftests/powerpc: Fix try-run when source tree is not writable (diff) | |
| download | linux-32377bd2cbb62e23ac0a1aaaf0048957c5fd9f02.tar.xz linux-32377bd2cbb62e23ac0a1aaaf0048957c5fd9f02.zip | |
powerpc/powernv: Add documentation for the opal sensor_groups sysfs interfaces
Commit bf9571550f52 ("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
Diffstat (limited to 'Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups b/Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups new file mode 100644 index 000000000000..3a2dfe542e8c --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups @@ -0,0 +1,21 @@ +What: /sys/firmware/opal/sensor_groups +Date: August 2017 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: Sensor groups directory for POWER9 powernv servers + + Each folder in this directory contains a sensor group + which are classified based on type of the sensor + like power, temperature, frequency, current, etc. They + can also indicate the group of sensors belonging to + different owners like CSM, Profiler, Job-Scheduler + +What: /sys/firmware/opal/sensor_groups/<sensor_group_name>/clear +Date: August 2017 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: Sysfs file to clear the min-max of all the sensors + belonging to the group. + + Writing 1 to this file will clear the minimum and + maximum values of all the sensors in the group. + In POWER9, the min-max of a sensor is the historical minimum + and maximum value of the sensor cached by OCC. |