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Diffstat (limited to 'kernel/Documentation/hwmon/ibmaem')
| -rw-r--r-- | kernel/Documentation/hwmon/ibmaem | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/kernel/Documentation/hwmon/ibmaem b/kernel/Documentation/hwmon/ibmaem new file mode 100644 index 000000000..1e0d59e00 --- /dev/null +++ b/kernel/Documentation/hwmon/ibmaem @@ -0,0 +1,38 @@ +Kernel driver ibmaem +====================== + +This driver talks to the IBM Systems Director Active Energy Manager, known +henceforth as AEM. + +Supported systems: + * Any recent IBM System X server with AEM support. + This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2, + x3950 M2, and certain HC10/HS2x/LS2x/QS2x blades. The IPMI host interface + driver ("ipmi-si") needs to be loaded for this driver to do anything. + Prefix: 'ibmaem' + Datasheet: Not available + +Author: Darrick J. Wong + +Description +----------- + +This driver implements sensor reading support for the energy and power meters +available on various IBM System X hardware through the BMC. All sensor banks +will be exported as platform devices; this driver can talk to both v1 and v2 +interfaces. This driver is completely separate from the older ibmpex driver. + +The v1 AEM interface has a simple set of features to monitor energy use. There +is a register that displays an estimate of raw energy consumption since the +last BMC reset, and a power sensor that returns average power use over a +configurable interval. + +The v2 AEM interface is a bit more sophisticated, being able to present a wider +range of energy and power use registers, the power cap as set by the AEM +software, and temperature sensors. + +Special Features +---------------- + +The "power_cap" value displays the current system power cap, as set by the AEM +software. Setting the power cap from the host is not currently supported. |