| Darrick J. Wong | 8808a79 | 2008-05-23 13:04:25 -0700 | [diff] [blame^] | 1 | Kernel driver ibmaem |
| 2 | ====================== |
| 3 | |
| 4 | Supported systems: |
| 5 | * Any recent IBM System X server with Active Energy Manager support. |
| 6 | This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2, |
| 7 | x3950 M2, and certain HS2x/LS2x/QS2x blades. The IPMI host interface |
| 8 | driver ("ipmi-si") needs to be loaded for this driver to do anything. |
| 9 | Prefix: 'ibmaem' |
| 10 | Datasheet: Not available |
| 11 | |
| 12 | Author: Darrick J. Wong |
| 13 | |
| 14 | Description |
| 15 | ----------- |
| 16 | |
| 17 | This driver implements sensor reading support for the energy and power |
| 18 | meters available on various IBM System X hardware through the BMC. All |
| 19 | sensor banks will be exported as platform devices; this driver can talk |
| 20 | to both v1 and v2 interfaces. This driver is completely separate from the |
| 21 | older ibmpex driver. |
| 22 | |
| 23 | The v1 AEM interface has a simple set of features to monitor energy use. |
| 24 | There is a register that displays an estimate of raw energy consumption |
| 25 | since the last BMC reset, and a power sensor that returns average power |
| 26 | use over a configurable interval. |
| 27 | |
| 28 | The v2 AEM interface is a bit more sophisticated, being able to present |
| 29 | a wider range of energy and power use registers, the power cap as |
| 30 | set by the AEM software, and temperature sensors. |
| 31 | |
| 32 | Special Features |
| 33 | ---------------- |
| 34 | |
| 35 | The "power_cap" value displays the current system power cap, as set by |
| 36 | the Active Energy Manager software. Setting the power cap from the host |
| 37 | is not currently supported. |