summaryrefslogtreecommitdiff
path: root/Documentation/hwmon/ibmaem
diff options
context:
space:
mode:
authorIngo Molnar <mingo@elte.hu>2008-06-23 11:53:03 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-23 11:53:03 +0200
commit009b9fc98ddd83f9139fdabb12c0d7a8535d5421 (patch)
treef7d3e182407d2ebe50a9b8db6361ac910027a1cf /Documentation/hwmon/ibmaem
parent3711ccb07b7f0a13f4f1aa16a8fdca9c930f21ca (diff)
parent481c5346d0981940ee63037eb53e4e37b0735c10 (diff)
Merge branch 'linus' into x86/threadinfotip-x86-threadinfo-2008-06-23_09.53_Mon
Diffstat (limited to 'Documentation/hwmon/ibmaem')
-rw-r--r--Documentation/hwmon/ibmaem37
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/hwmon/ibmaem b/Documentation/hwmon/ibmaem
new file mode 100644
index 000000000000..2fefaf582a43
--- /dev/null
+++ b/Documentation/hwmon/ibmaem
@@ -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.