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- Kernel Driver IBMPOWERNV
- ========================
- Supported systems:
- * Any recent IBM P servers based on POWERNV platform
- Author: Neelesh Gupta
- Description
- -----------
- 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.
- Usage notes
- -----------
- The driver is built statically with the kernel by enabling the config
- CONFIG_SENSORS_IBMPOWERNV. It can also be built as module 'ibmpowernv'.
- Sysfs attributes
- ----------------
- 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)
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