eb93b7df7e
Minor documentation update to reflect the current full name of the power management hardware interface and reflows the text a bit. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
39 lines
1.4 KiB
Text
39 lines
1.4 KiB
Text
Kernel driver ibmaem
|
|
======================
|
|
|
|
This driver talks to the IBM Systems Director Active Energy Manager, known
|
|
henceforth as AEM.
|
|
|
|
Supported systems:
|
|
* Any recent IBM System X server with AEM support.
|
|
This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
|
|
x3950 M2, and certain HS2x/LS2x/QS2x blades. The IPMI host interface
|
|
driver ("ipmi-si") needs to be loaded for this driver to do anything.
|
|
Prefix: 'ibmaem'
|
|
Datasheet: Not available
|
|
|
|
Author: Darrick J. Wong
|
|
|
|
Description
|
|
-----------
|
|
|
|
This driver implements sensor reading support for the energy and power meters
|
|
available on various IBM System X hardware through the BMC. All sensor banks
|
|
will be exported as platform devices; this driver can talk to both v1 and v2
|
|
interfaces. This driver is completely separate from the older ibmpex driver.
|
|
|
|
The v1 AEM interface has a simple set of features to monitor energy use. There
|
|
is a register that displays an estimate of raw energy consumption since the
|
|
last BMC reset, and a power sensor that returns average power use over a
|
|
configurable interval.
|
|
|
|
The v2 AEM interface is a bit more sophisticated, being able to present a wider
|
|
range of energy and power use registers, the power cap as set by the AEM
|
|
software, and temperature sensors.
|
|
|
|
Special Features
|
|
----------------
|
|
|
|
The "power_cap" value displays the current system power cap, as set by the AEM
|
|
software. Setting the power cap from the host is not currently supported.
|