From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: ALC650 GPIO bits
Date: Wed, 03 Mar 2004 16:30:03 +0100
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Hi,

it seems that some mobo with ALC650 uses GPIO 0 as the mic bias +5V.

in ac97_patch.c, the GPIO 0 is turned on/off in conjunction with
the mic/center sharing switch, but this handling appears only for the
old ALC650 revision (D or older).

interestingly, there is a report that even a mobo with the newer
revision of ALC650 has this GPIO bit.
now, the question is why GPIO is not handled with the revision E and
F.  i can't remember the reason (google gives no good info) -- does
anyone still know?

is there any mobo with a side effect of this GPIO?


Takashi


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