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-rw-r--r--Documentation/ibm-acpi.txt18
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ibm-acpi.txt b/Documentation/ibm-acpi.txt
index 1672590d8efa..00b8cf3999cc 100644
--- a/Documentation/ibm-acpi.txt
+++ b/Documentation/ibm-acpi.txt
@@ -33,6 +33,7 @@ detailed description):
- LCD brightness control
- Volume control
- Experimental: fan speed, fan enable/disable
+ - Experimental: WAN enable and disable
A compatibility table by model and feature is maintained on the web
site, http://ibm-acpi.sf.net/. I appreciate any success or failure
@@ -601,6 +602,23 @@ with the following command:
echo 'level <level>' > /proc/acpi/ibm/thermal
+EXPERIMENTAL: WAN -- /proc/acpi/ibm/wan
+---------------------------------------
+
+This feature is marked EXPERIMENTAL because the implementation
+directly accesses hardware registers and may not work as expected. USE
+WITH CAUTION! To use this feature, you need to supply the
+experimental=1 parameter when loading the module.
+
+This feature shows the presence and current state of a WAN (Sierra
+Wireless EV-DO) device. If WAN is installed, the following commands can
+be used:
+
+ echo enable > /proc/acpi/ibm/wan
+ echo disable > /proc/acpi/ibm/wan
+
+It was tested on a Lenovo Thinkpad X60. It should probably work on other
+Thinkpad models which come with this module installed.
Multiple Commands, Module Parameters
------------------------------------