Input: add SW_PEN_INSERTED define
Some devices with a pen may have a switch that can be used to detect when the pen is inserted or removed to a slot on the device. Let's add a define to the input event codes so that everyone can be on the same page for what event we should generate when the pen is inserted or removed. In general the pen switch could be used by the software on the device to kick off any number of actions when the pen is inserted or removed. Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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