From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Eric Millbrandt <emillbrandt@dekaresearch.com>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
Wolfgang Denk <wd@denx.de>
Subject: Re: [PATCH 0/2] mpc5200 ac97 gpio reset
Date: Wed, 9 Jun 2010 15:32:46 +0100 [thread overview]
Message-ID: <20100609143246.GA17945@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <0A40042D85E7C84DB443060EC44B3FD3253ECB8C84@dekaexchange07.deka.local>
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).
next prev parent reply other threads:[~2010-06-09 14:32 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-08 16:46 [PATCH 0/2] mpc5200 ac97 gpio reset Eric Millbrandt
2010-06-08 16:46 ` [PATCH 1/2] powerpc/5200: Export port-config Eric Millbrandt
2010-06-08 16:46 ` [PATCH 2/2] sound/soc: mpc5200_psc_ac97: Use gpio pins for cold reset Eric Millbrandt
2010-06-09 10:25 ` Mark Brown
2010-06-10 22:11 ` [PATCH 1/2] powerpc/5200: Export port-config Grant Likely
2010-06-09 0:24 ` [PATCH 0/2] mpc5200 ac97 gpio reset Jon Smirl
2010-06-09 6:13 ` Wolfgang Denk
2010-06-09 10:30 ` Mark Brown
2010-06-09 14:24 ` Eric Millbrandt
2010-06-10 22:07 ` Grant Likely
2010-06-10 23:14 ` Mark Brown
2010-06-10 23:31 ` Grant Likely
2010-06-09 12:21 ` Jon Smirl
2010-06-09 14:21 ` Eric Millbrandt
2010-06-09 14:32 ` Mark Brown [this message]
2010-06-09 14:41 ` Jon Smirl
2010-06-09 15:11 ` Mark Brown
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