eb93b7df7e
Minor documentation update to reflect the current full name of the power management hardware interface and reflows the text a bit. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
38 lines
1.4 KiB
Text
38 lines
1.4 KiB
Text
Kernel driver ibmaem
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======================
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This driver talks to the IBM Systems Director Active Energy Manager, known
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henceforth as AEM.
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Supported systems:
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* Any recent IBM System X server with AEM support.
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This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
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x3950 M2, and certain HS2x/LS2x/QS2x blades. The IPMI host interface
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driver ("ipmi-si") needs to be loaded for this driver to do anything.
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Prefix: 'ibmaem'
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Datasheet: Not available
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Author: Darrick J. Wong
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Description
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-----------
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This driver implements sensor reading support for the energy and power meters
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available on various IBM System X hardware through the BMC. All sensor banks
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will be exported as platform devices; this driver can talk to both v1 and v2
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interfaces. This driver is completely separate from the older ibmpex driver.
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The v1 AEM interface has a simple set of features to monitor energy use. There
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is a register that displays an estimate of raw energy consumption since the
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last BMC reset, and a power sensor that returns average power use over a
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configurable interval.
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The v2 AEM interface is a bit more sophisticated, being able to present a wider
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range of energy and power use registers, the power cap as set by the AEM
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software, and temperature sensors.
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Special Features
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----------------
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The "power_cap" value displays the current system power cap, as set by the AEM
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software. Setting the power cap from the host is not currently supported.
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