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Input: ALPS - fix touchpad detection when buttons are pressed

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ALPS touchpad detection fails if some buttons of ALPS are pressed.
The reason is that the "E6" query response byte is different from
what is expected.

This was tested on a Toshiba Portege R500.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Akio Idehara <zbe64533@gmail.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Akio Idehara
2012-02-24 00:33:22 -08:00
committed by Dmitry Torokhov
parent 82b982c9a6
commit 99c90ab31f
2 changed files with 7 additions and 3 deletions
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3
Documentation/input/alps.txt
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@@ -13,7 +13,8 @@ Detection
All ALPS touchpads should respond to the "E6 report" command sequence:
E8-E6-E6-E6-E9. An ALPS touchpad should respond with either 00-00-0A or
00-00-64.
00-00-64 if no buttons are pressed. The bits 0-2 of the first byte will be 1s
if some buttons are pressed.
If the E6 report is successful, the touchpad model is identified using the "E7
report" sequence: E8-E7-E7-E7-E9. The response is the model signature and is