Commit 8808a793 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Linus Torvalds
Browse files

ibmaem: new driver for power/energy/temp meters in IBM System X hardware 



This driver reads IBM Active Energy Manager energy/temperature/power
sensors on IBM System X hardware.

[akpm@linux-foundation.org: fix printk warnings]
Signed-off-by: default avatarDarrick J. Wong <djwong@us.ibm.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Corey Minyard <minyard@acm.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b8fdaf5a

Documentation/hwmon/ibmaem

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Kernel driver ibmaem

======================



Supported systems:

  * Any recent IBM System X server with Active Energy Manager support.

    This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,

    x3950 M2, and certain 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 Active Energy Manager software.  Setting the power cap from the host

is not currently supported.

drivers/hwmon/Kconfig

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@@ -330,6 +330,20 @@ config SENSORS_CORETEMP 
	  sensor inside your CPU. Supported all are all known variants

	  of Intel Core family.



config SENSORS_IBMAEM

	tristate "IBM Active Energy Manager temperature/power sensors and control"

	select IPMI_SI

	depends on IPMI_HANDLER

	help

	  If you say yes here you get support for the temperature and

	  power sensors and capping hardware in various IBM System X

	  servers that support Active Energy Manager.  This includes

	  the x3350, x3550, x3650, x3655, x3755, x3850 M2, x3950 M2,

	  and certain HS2x/LS2x/QS2x blades.



	  This driver can also be built as a module.  If so, the module

	  will be called ibmaem.



config SENSORS_IBMPEX

	tristate "IBM PowerExecutive temperature/power sensors"

	select IPMI_SI

drivers/hwmon/Makefile

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@@ -41,6 +41,7 @@ obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o 
obj-$(CONFIG_SENSORS_GL520SM)	+= gl520sm.o

obj-$(CONFIG_SENSORS_HDAPS)	+= hdaps.o

obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o

obj-$(CONFIG_SENSORS_IBMAEM)	+= ibmaem.o

obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o

obj-$(CONFIG_SENSORS_IT87)	+= it87.o

obj-$(CONFIG_SENSORS_K8TEMP)	+= k8temp.o

drivers/hwmon/ibmaem.c

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