From: Manuel Lauss <manuel.lauss@googlemail.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: linux-input@vger.kernel.org
Subject: Re: WM9712 GPIO
Date: Wed, 12 May 2010 14:54:16 +0200 [thread overview]
Message-ID: <AANLkTimZnfh4ld3dcEYbdDsOdNe3J7FNLWK4bpk9Ppbc@mail.gmail.com> (raw)
In-Reply-To: <20100512125229.GB8082@rakim.wolfsonmicro.main>
On Wed, May 12, 2010 at 2:52 PM, Mark Brown
<broonie@opensource.wolfsonmicro.com> wrote:
> On Wed, May 12, 2010 at 02:50:44PM +0200, Manuel Lauss wrote:
>> On Wed, May 12, 2010 at 2:30 PM, Mark Brown
>
>> > The WM9712 does not support this feature. It only supports setting the
>> > GPIO status by use of AC'97 slot 12 for which there's currently no
>> > standard glue on Linux. Setting slot 12 needs to be done in the AC'97
>> > controller.
>
>> Wonderful. Thanks for the info.
>
> Glad to be of service :) . FWIW slot 12 is the method specified by the
> AC'97 standard for setting GPIO on AC'97 CODECs so we really should have
> something for it, but sadly quality of implementation and coverage in
> controllers is a little variable.
Fortunately my target CPU does have special AC97 GPIO registers. So all
is well on my end :)
Manuel
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prev parent reply other threads:[~2010-05-12 12:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 11:47 WM9712 GPIO Manuel Lauss
2010-05-12 12:30 ` Mark Brown
2010-05-12 12:50 ` Manuel Lauss
2010-05-12 12:52 ` Mark Brown
2010-05-12 12:54 ` Manuel Lauss [this message]
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