1*4882a593SmuzhiyunKernel driver ibmaem 2*4882a593Smuzhiyun==================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunThis driver talks to the IBM Systems Director Active Energy Manager, known 5*4882a593Smuzhiyunhenceforth as AEM. 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunSupported systems: 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun * Any recent IBM System X server with AEM support. 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2, 12*4882a593Smuzhiyun x3950 M2, and certain HC10/HS2x/LS2x/QS2x blades. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun The IPMI host interface 15*4882a593Smuzhiyun driver ("ipmi-si") needs to be loaded for this driver to do anything. 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun Prefix: 'ibmaem' 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun Datasheet: Not available 20*4882a593Smuzhiyun 21*4882a593SmuzhiyunAuthor: Darrick J. Wong 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunDescription 24*4882a593Smuzhiyun----------- 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunThis driver implements sensor reading support for the energy and power meters 27*4882a593Smuzhiyunavailable on various IBM System X hardware through the BMC. All sensor banks 28*4882a593Smuzhiyunwill be exported as platform devices; this driver can talk to both v1 and v2 29*4882a593Smuzhiyuninterfaces. This driver is completely separate from the older ibmpex driver. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunThe v1 AEM interface has a simple set of features to monitor energy use. There 32*4882a593Smuzhiyunis a register that displays an estimate of raw energy consumption since the 33*4882a593Smuzhiyunlast BMC reset, and a power sensor that returns average power use over a 34*4882a593Smuzhiyunconfigurable interval. 35*4882a593Smuzhiyun 36*4882a593SmuzhiyunThe v2 AEM interface is a bit more sophisticated, being able to present a wider 37*4882a593Smuzhiyunrange of energy and power use registers, the power cap as set by the AEM 38*4882a593Smuzhiyunsoftware, and temperature sensors. 39*4882a593Smuzhiyun 40*4882a593SmuzhiyunSpecial Features 41*4882a593Smuzhiyun---------------- 42*4882a593Smuzhiyun 43*4882a593SmuzhiyunThe "power_cap" value displays the current system power cap, as set by the AEM 44*4882a593Smuzhiyunsoftware. Setting the power cap from the host is not currently supported. 45