1 Kernel driver ibmaem
2 ====================
3
4 This driver talks to the IBM Systems Director Active Energy Manager, known
5 henceforth as AEM.
6
7 Supported 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
21 Author: Darrick J. Wong
22
23 Description
24 -----------
25
26 This driver implements sensor reading support for the energy and power meters
27 available on various IBM System X hardware through the BMC. All sensor banks
28 will be exported as platform devices; this driver can talk to both v1 and v2
29 interfaces. This driver is completely separate from the older ibmpex driver.
30
31 The v1 AEM interface has a simple set of features to monitor energy use. There
32 is a register that displays an estimate of raw energy consumption since the
33 last BMC reset, and a power sensor that returns average power use over a
34 configurable interval.
35
36 The v2 AEM interface is a bit more sophisticated, being able to present a wider
37 range of energy and power use registers, the power cap as set by the AEM
38 software, and temperature sensors.
39
40 Special Features
41 ----------------
42
43 The "power_cap" value displays the current system power cap, as set by the AEM
44 software. Setting the power cap from the host is not currently supported.
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