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87 lines
3.0 KiB
87 lines
3.0 KiB
Kernel Driver IBMPOWERNV |
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Supported systems: |
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* Any recent IBM P servers based on POWERNV platform |
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Author: Neelesh Gupta |
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Description |
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----------- |
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This driver implements reading the platform sensors data like temperature/fan/ |
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voltage/power for 'POWERNV' platform. |
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The driver uses the platform device infrastructure. It probes the device tree |
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for sensor devices during the __init phase and registers them with the 'hwmon'. |
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'hwmon' populates the 'sysfs' tree having attribute files, each for a given |
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sensor type and its attribute data. |
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All the nodes in the DT appear under "/ibm,opal/sensors" and each valid node in |
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the DT maps to an attribute file in 'sysfs'. The node exports unique 'sensor-id' |
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which the driver uses to make an OPAL call to the firmware. |
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Usage notes |
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----------- |
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The driver is built statically with the kernel by enabling the config |
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CONFIG_SENSORS_IBMPOWERNV. It can also be built as module 'ibmpowernv'. |
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Sysfs attributes |
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---------------- |
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======================= ======================================================= |
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fanX_input Measured RPM value. |
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fanX_min Threshold RPM for alert generation. |
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fanX_fault - 0: No fail condition |
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- 1: Failing fan |
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tempX_input Measured ambient temperature. |
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tempX_max Threshold ambient temperature for alert generation. |
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tempX_highest Historical maximum temperature |
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tempX_lowest Historical minimum temperature |
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tempX_enable Enable/disable all temperature sensors belonging to the |
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sub-group. In POWER9, this attribute corresponds to |
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each OCC. Using this attribute each OCC can be asked to |
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disable/enable all of its temperature sensors. |
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- 1: Enable |
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- 0: Disable |
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inX_input Measured power supply voltage (millivolt) |
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inX_fault - 0: No fail condition. |
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- 1: Failing power supply. |
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inX_highest Historical maximum voltage |
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inX_lowest Historical minimum voltage |
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inX_enable Enable/disable all voltage sensors belonging to the |
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sub-group. In POWER9, this attribute corresponds to |
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each OCC. Using this attribute each OCC can be asked to |
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disable/enable all of its voltage sensors. |
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- 1: Enable |
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- 0: Disable |
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powerX_input Power consumption (microWatt) |
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powerX_input_highest Historical maximum power |
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powerX_input_lowest Historical minimum power |
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powerX_enable Enable/disable all power sensors belonging to the |
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sub-group. In POWER9, this attribute corresponds to |
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each OCC. Using this attribute each OCC can be asked to |
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disable/enable all of its power sensors. |
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- 1: Enable |
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- 0: Disable |
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currX_input Measured current (milliampere) |
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currX_highest Historical maximum current |
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currX_lowest Historical minimum current |
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currX_enable Enable/disable all current sensors belonging to the |
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sub-group. In POWER9, this attribute corresponds to |
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each OCC. Using this attribute each OCC can be asked to |
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disable/enable all of its current sensors. |
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- 1: Enable |
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- 0: Disable |
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energyX_input Cumulative energy (microJoule) |
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======================= =======================================================
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