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Input: MT - Specify that ABS_MT_SLOT must have a minimum of 0 

This is effectively already in force through input_mt_init_slots, and uinput
too ignores the actual minimum.

Since slots are a kernel-genenerated axis only, non-zero minimums make
little sense and are likely to cause errors. Better to treat a non-zero
minimum as kernel bug if it ever happens.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
hifive-unleashed-5.1
Peter Hutterer 2013-05-31 16:29:44 +10:00 committed by Henrik Rydberg
parent 317ddd256b
commit 257867dc8d
1 changed files with 2 additions and 0 deletions
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Documentation/input/multi-touch-protocol.txt
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@ -80,6 +80,8 @@ Userspace can detect that a driver can report more total contacts than slots
by noting that the largest supported BTN_TOOL_*TAP event is larger than the
total number of type B slots reported in the absinfo for the ABS_MT_SLOT axis.
The minimum value of the ABS_MT_SLOT axis must be 0.
Protocol Example A
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