tree d9dde8a58a416645b5a3bed779051d5c41e50944
parent 8b2f079523450fa2d65cbb3f8453820bf1e17533
author Devin Heitmueller <dheitmueller@linuxtv.org> 1236751241 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1238427805 -0300

V4L/DVB (11067): au0828: workaround a bug in the au0828 i2c handling

There is an issue related to the i2c clock for addressing the xc5000.  The
au0828 chip does not support clock stretching, which the xc5000 makes use of.
This results in cases where we silently get back garbage in i2c read
operations.  To work around this issue until we slow down the i2c clock when
talking with that specific device.

This was not an issue before we had analog support because we never needed to
enumerate the i2c bus, and digital tuning never actually needed to perform
read operations against the xc5000.

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: Mauro Carvalho Chehab <mchehab@redhat.com>