1Kernel driver ibmaem
2====================
3
4This driver talks to the IBM Systems Director Active Energy Manager, known
5henceforth as AEM.
6
7Supported systems:
8
9  * Any recent IBM System X server with AEM support.
10
11    This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
12    x3950 M2, and certain HC10/HS2x/LS2x/QS2x blades.
13
14    The IPMI host interface
15    driver ("ipmi-si") needs to be loaded for this driver to do anything.
16
17    Prefix: 'ibmaem'
18
19    Datasheet: Not available
20
21Author: Darrick J. Wong
22
23Description
24-----------
25
26This driver implements sensor reading support for the energy and power meters
27available on various IBM System X hardware through the BMC.  All sensor banks
28will be exported as platform devices; this driver can talk to both v1 and v2
29interfaces.  This driver is completely separate from the older ibmpex driver.
30
31The v1 AEM interface has a simple set of features to monitor energy use.  There
32is a register that displays an estimate of raw energy consumption since the
33last BMC reset, and a power sensor that returns average power use over a
34configurable interval.
35
36The v2 AEM interface is a bit more sophisticated, being able to present a wider
37range of energy and power use registers, the power cap as set by the AEM
38software, and temperature sensors.
39
40Special Features
41----------------
42
43The "power_cap" value displays the current system power cap, as set by the AEM
44software.  Setting the power cap from the host is not currently supported.
45