| 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) |