tree 6f97b54fc18db01504cc46dc72d7f28d7d91d5a7
parent 9b010de59cb6dcab7e167dd2a0fa5d3b31447fea
author Henrique de Moraes Holschuh <hmh@hmh.eng.br> 1184813131 -0300
committer Len Brown <len.brown@intel.com> 1185075488 -0400

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>