V4L/DVB (11074): au0828: fix i2c enumeration bug

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There was a bug where enumerating the i2c for devices would result in false
positives.  The root of the issue was the scanning was using SMBUS_QUICK
messages, which are zero length write requests (which our i2c adapter
implementation didn't handle).  Because we never strobed any bytes onto the
bus, the status register would still contain the value from the previous
request.

Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Devin Heitmueller 2009-03-11 03:00:56 -03:00 • committed by Mauro Carvalho Chehab

parent 5a5a4e16fa

commit dc8685b565

1 changed files with 18 additions and 0 deletions

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drivers/media/video/au0828/au0828-i2c.c

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