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