v4.19.13 snapshot.
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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.
+tempX_highest Historical maximum temperature
+tempX_lowest Historical minimum temperature
+tempX_enable Enable/disable all temperature sensors belonging to the
+ sub-group. In POWER9, this attribute corresponds to
+ each OCC. Using this attribute each OCC can be asked to
+ disable/enable all of its temperature sensors.
+ 1: Enable
+ 0: Disable
+
+inX_input Measured power supply voltage (millivolt)
+inX_fault 0: No fail condition.
+ 1: Failing power supply.
+inX_highest Historical maximum voltage
+inX_lowest Historical minimum voltage
+inX_enable Enable/disable all voltage sensors belonging to the
+ sub-group. In POWER9, this attribute corresponds to
+ each OCC. Using this attribute each OCC can be asked to
+ disable/enable all of its voltage sensors.
+ 1: Enable
+ 0: Disable
+
+powerX_input Power consumption (microWatt)
+powerX_input_highest Historical maximum power
+powerX_input_lowest Historical minimum power
+powerX_enable Enable/disable all power sensors belonging to the
+ sub-group. In POWER9, this attribute corresponds to
+ each OCC. Using this attribute each OCC can be asked to
+ disable/enable all of its power sensors.
+ 1: Enable
+ 0: Disable
+
+currX_input Measured current (milliampere)
+currX_highest Historical maximum current
+currX_lowest Historical minimum current
+currX_enable Enable/disable all current sensors belonging to the
+ sub-group. In POWER9, this attribute corresponds to
+ each OCC. Using this attribute each OCC can be asked to
+ disable/enable all of its current sensors.
+ 1: Enable
+ 0: Disable
+
+energyX_input Cumulative energy (microJoule)