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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

	  sensor inside your CPU. Supported all are all known variants

	  of Intel Core family.

	  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

config SENSORS_IBMPEX

	tristate "IBM PowerExecutive temperature/power sensors"

	tristate "IBM PowerExecutive temperature/power sensors"

	select IPMI_SI

	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_GL520SM)	+= gl520sm.o

obj-$(CONFIG_SENSORS_HDAPS)	+= hdaps.o

obj-$(CONFIG_SENSORS_HDAPS)	+= hdaps.o

obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o

obj-$(CONFIG_SENSORS_I5K_AMB)	+= i5k_amb.o

obj-$(CONFIG_SENSORS_IBMAEM)	+= ibmaem.o

obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o

obj-$(CONFIG_SENSORS_IBMPEX)	+= ibmpex.o

obj-$(CONFIG_SENSORS_IT87)	+= it87.o

obj-$(CONFIG_SENSORS_IT87)	+= it87.o

obj-$(CONFIG_SENSORS_K8TEMP)	+= k8temp.o

obj-$(CONFIG_SENSORS_K8TEMP)	+= k8temp.o

drivers/hwmon/ibmaem.c

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