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