Documentation/hwmon/ibmpowernv.rst
Supported systems:
Author: Neelesh Gupta
This driver implements reading the platform sensors data like temperature/fan/ voltage/power for 'POWERNV' platform.
The driver uses the platform device infrastructure. It probes the device tree for sensor devices during the __init phase and registers them with the 'hwmon'. 'hwmon' populates the 'sysfs' tree having attribute files, each for a given sensor type and its attribute data.
All the nodes in the DT appear under "/ibm,opal/sensors" and each valid node in the DT maps to an attribute file in 'sysfs'. The node exports unique 'sensor-id' which the driver uses to make an OPAL call to the firmware.
The driver is built statically with the kernel by enabling the config CONFIG_SENSORS_IBMPOWERNV. It can also be built as module 'ibmpowernv'.
======================= ======================================================= fanX_input Measured RPM value. fanX_min Threshold RPM for alert generation. fanX_fault - 0: No fail condition - 1: Failing fan
tempX_input Measured ambient temperature. tempX_max Threshold ambient temperature for alert generation. tempX_highest Historical maximum temperature tempX_lowest Historical minimum temperature tempX_enable Enable/disable all temperature sensors belonging to the sub-group. In POWER9, this attribute corresponds to each OCC. Using this attribute each OCC can be asked to disable/enable all of its temperature sensors.
- 1: Enable
- 0: Disable
inX_input Measured power supply voltage (millivolt) inX_fault - 0: No fail condition. - 1: Failing power supply. inX_highest Historical maximum voltage inX_lowest Historical minimum voltage inX_enable Enable/disable all voltage sensors belonging to the sub-group. In POWER9, this attribute corresponds to each OCC. Using this attribute each OCC can be asked to disable/enable all of its voltage sensors.
- 1: Enable
- 0: Disable
powerX_input Power consumption (microWatt) powerX_input_highest Historical maximum power powerX_input_lowest Historical minimum power powerX_enable Enable/disable all power sensors belonging to the sub-group. In POWER9, this attribute corresponds to each OCC. Using this attribute each OCC can be asked to disable/enable all of its power sensors.
- 1: Enable
- 0: Disable
currX_input Measured current (milliampere) currX_highest Historical maximum current currX_lowest Historical minimum current currX_enable Enable/disable all current sensors belonging to the sub-group. In POWER9, this attribute corresponds to each OCC. Using this attribute each OCC can be asked to disable/enable all of its current sensors.
- 1: Enable
- 0: Disable
energyX_input Cumulative energy (microJoule) ======================= =======================================================