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

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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: Darrick J. Wong <djwong@us.ibm.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Darrick J. Wong 2008-05-23 13:04:25 -07:00 committed by Linus Torvalds
parent b8fdaf5a05
commit 8808a793f0
4 changed files with 1163 additions and 0 deletions
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37
Documentation/hwmon/ibmaem Normal file
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@ -0,0 +1,37 @@
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.

14
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

1
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

1111
drivers/hwmon/ibmaem.c Normal file
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