0001 Kernel driver ibmaem
0002 ====================
0003
0004 This driver talks to the IBM Systems Director Active Energy Manager, known
0005 henceforth as AEM.
0006
0007 Supported systems:
0008
0009 * Any recent IBM System X server with AEM support.
0010
0011 This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
0012 x3950 M2, and certain HC10/HS2x/LS2x/QS2x blades.
0013
0014 The IPMI host interface
0015 driver ("ipmi-si") needs to be loaded for this driver to do anything.
0016
0017 Prefix: 'ibmaem'
0018
0019 Datasheet: Not available
0020
0021 Author: Darrick J. Wong
0022
0023 Description
0024 -----------
0025
0026 This driver implements sensor reading support for the energy and power meters
0027 available on various IBM System X hardware through the BMC. All sensor banks
0028 will be exported as platform devices; this driver can talk to both v1 and v2
0029 interfaces. This driver is completely separate from the older ibmpex driver.
0030
0031 The v1 AEM interface has a simple set of features to monitor energy use. There
0032 is a register that displays an estimate of raw energy consumption since the
0033 last BMC reset, and a power sensor that returns average power use over a
0034 configurable interval.
0035
0036 The v2 AEM interface is a bit more sophisticated, being able to present a wider
0037 range of energy and power use registers, the power cap as set by the AEM
0038 software, and temperature sensors.
0039
0040 Special Features
0041 ----------------
0042
0043 The "power_cap" value displays the current system power cap, as set by the AEM
0044 software. Setting the power cap from the host is not currently supported.
