[PATCH 0/2] mpc5200 ac97 gpio reset

Mark Brown broonie at opensource.wolfsonmicro.com
Thu Jun 10 00:32:46 EST 2010


On Wed, Jun 09, 2010 at 10:21:40AM -0400, Eric Millbrandt wrote:

[Please fix your MUA to word wrap paragraphs to within 80 characters,
I've reflowed the text below.]

> From the MPC5200B user manual:
> "Some AC97 devices goes to a test mode, if the Sync line is high
> during the Res line is low (reset phase). To avoid this behavior the
> Sync line must be also forced to zero during the reset phase. To do
> that, the pin muxing should switch to GPIO mode and the GPIO control
> register should be used to control the output lines."

Please include this quote in the changelog for the patch, if this a
documented workaround from the vendor that's a very different thing to
something that you've found happens to work on your systems (which is
more what your changelog sounded like).


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