Commit | Line | Data |
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8808a793 DW |
1 | Kernel driver ibmaem |
2 | ====================== | |
3 | ||
eb93b7df DW |
4 | This driver talks to the IBM Systems Director Active Energy Manager, known |
5 | henceforth as AEM. | |
6 | ||
8808a793 | 7 | Supported systems: |
eb93b7df | 8 | * Any recent IBM System X server with AEM support. |
8808a793 | 9 | This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2, |
8070408b | 10 | x3950 M2, and certain HC10/HS2x/LS2x/QS2x blades. The IPMI host interface |
8808a793 DW |
11 | driver ("ipmi-si") needs to be loaded for this driver to do anything. |
12 | Prefix: 'ibmaem' | |
13 | Datasheet: Not available | |
14 | ||
15 | Author: Darrick J. Wong | |
16 | ||
17 | Description | |
18 | ----------- | |
19 | ||
eb93b7df DW |
20 | This driver implements sensor reading support for the energy and power meters |
21 | available on various IBM System X hardware through the BMC. All sensor banks | |
22 | will be exported as platform devices; this driver can talk to both v1 and v2 | |
23 | interfaces. This driver is completely separate from the older ibmpex driver. | |
8808a793 | 24 | |
eb93b7df DW |
25 | The v1 AEM interface has a simple set of features to monitor energy use. There |
26 | is a register that displays an estimate of raw energy consumption since the | |
27 | last BMC reset, and a power sensor that returns average power use over a | |
28 | configurable interval. | |
8808a793 | 29 | |
eb93b7df DW |
30 | The v2 AEM interface is a bit more sophisticated, being able to present a wider |
31 | range of energy and power use registers, the power cap as set by the AEM | |
32 | software, and temperature sensors. | |
8808a793 DW |
33 | |
34 | Special Features | |
35 | ---------------- | |
36 | ||
eb93b7df DW |
37 | The "power_cap" value displays the current system power cap, as set by the AEM |
38 | software. Setting the power cap from the host is not currently supported. |