mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 06:41:43 +00:00
42 lines
1.3 KiB
Plaintext
42 lines
1.3 KiB
Plaintext
|
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.
|
||
|
|
inX_input Measured power supply voltage
|
||
|
|
inX_fault 0: No fail condition.
|
||
|
|
1: Failing power supply.
|
||
|
|
power1_input System power consumption (microWatt)
|