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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.
- inX_input Measured power supply voltage
- inX_fault 0: No fail condition.
- 1: Failing power supply.
- power1_input System power consumption (microWatt)
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