1 Kernel Driver IBMPOWERNV
2 ========================
5 * Any recent IBM P servers based on POWERNV platform
12 This driver implements reading the platform sensors data like temperature/fan/
13 voltage/power for 'POWERNV' platform.
15 The driver uses the platform device infrastructure. It probes the device tree
16 for sensor devices during the __init phase and registers them with the 'hwmon'.
17 'hwmon' populates the 'sysfs' tree having attribute files, each for a given
18 sensor type and its attribute data.
20 All the nodes in the DT appear under "/ibm,opal/sensors" and each valid node in
21 the DT maps to an attribute file in 'sysfs'. The node exports unique 'sensor-id'
22 which the driver uses to make an OPAL call to the firmware.
26 The driver is built statically with the kernel by enabling the config
27 CONFIG_SENSORS_IBMPOWERNV. It can also be built as module 'ibmpowernv'.
32 fanX_input Measured RPM value.
33 fanX_min Threshold RPM for alert generation.
34 fanX_fault 0: No fail condition
37 tempX_input Measured ambient temperature.
38 tempX_max Threshold ambient temperature for alert generation.
39 tempX_highest Historical maximum temperature
40 tempX_lowest Historical minimum temperature
41 tempX_enable Enable/disable all temperature sensors belonging to the
42 sub-group. In POWER9, this attribute corresponds to
43 each OCC. Using this attribute each OCC can be asked to
44 disable/enable all of its temperature sensors.
48 inX_input Measured power supply voltage (millivolt)
49 inX_fault 0: No fail condition.
50 1: Failing power supply.
51 inX_highest Historical maximum voltage
52 inX_lowest Historical minimum voltage
53 inX_enable Enable/disable all voltage sensors belonging to the
54 sub-group. In POWER9, this attribute corresponds to
55 each OCC. Using this attribute each OCC can be asked to
56 disable/enable all of its voltage sensors.
60 powerX_input Power consumption (microWatt)
61 powerX_input_highest Historical maximum power
62 powerX_input_lowest Historical minimum power
63 powerX_enable Enable/disable all power sensors belonging to the
64 sub-group. In POWER9, this attribute corresponds to
65 each OCC. Using this attribute each OCC can be asked to
66 disable/enable all of its power sensors.
70 currX_input Measured current (milliampere)
71 currX_highest Historical maximum current
72 currX_lowest Historical minimum current
73 currX_enable Enable/disable all current sensors belonging to the
74 sub-group. In POWER9, this attribute corresponds to
75 each OCC. Using this attribute each OCC can be asked to
76 disable/enable all of its current sensors.
80 energyX_input Cumulative energy (microJoule)