mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
7ebd8b66dd
Now that all files were converted to ReST format, rename them and add an index. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
87 lines
3 KiB
ReStructuredText
87 lines
3 KiB
ReStructuredText
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)
|
|
======================= =======================================================
|