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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-07-18 23:45:31 -0300
committerLen Brown <len.brown@intel.com>2007-07-21 23:38:08 -0400
commit74941a69afcc06722685d492784414ec042ab492 (patch)
tree6f97b54fc18db01504cc46dc72d7f28d7d91d5a7 /Documentation
parent9b010de59cb6dcab7e167dd2a0fa5d3b31447fea (diff)
downloadop-kernel-dev-74941a69afcc06722685d492784414ec042ab492.zip
op-kernel-dev-74941a69afcc06722685d492784414ec042ab492.tar.gz
ACPI: thinkpad-acpi: export to sysfs the state of the radio slider switch
Some ThinkPad models, notably the T60 and X60, have a slider switch to enable and disable the radios. The switch has the capability of force-disabling the radios in hardware on most models, and it is supposed to affect all radios (WLAN, WWAN, BlueTooth). Export the switch state as a sysfs attribute, on ThinkPads where it is available. Thanks to Henning Schild for asking for this feature, and for tracking down the EC register that holds the radio switch state. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Henning Schild <henning@wh9.tu-dresden.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/thinkpad-acpi.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index 142a14f..fe26e50 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -227,6 +227,12 @@ sysfs notes:
supported hot keys, except those which are handled by
the firmware. Echo it to hotkey_mask above, to use.
+ hotkey_radio_sw:
+ if the ThinkPad has a hardware radio switch, this
+ attribute will read 0 if the switch is in the "radios
+ disabled" postition, and 1 if the switch is in the
+ "radios enabled" position.
+
Bluetooth
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