linux-kernel - Re: [alsa-devel] [PATCH] ASoC: codecs: Add DA9055 codec driver

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Message-ID: <20120913120351.GA8374@opensource.wolfsonmicro.com>
Date:	Thu, 13 Sep 2012 20:03:53 +0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Ashish Chavan <ashish.chavan@...tcummins.com>
Cc:	lrg <lrg@...com>, alsa-devel <alsa-devel@...a-project.org>,
	David Dajun Chen <david.chen@...semi.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: codecs: Add DA9055 codec driver

On Thu, Sep 13, 2012 at 05:38:36PM +0530, Ashish Chavan wrote:
> On Wed, 2012-09-12 at 10:57 +0800, Mark Brown wrote:

> > > +	aif_ctrl |= (DA9055_AIF_OE | DA9055_AIF_EN);

> > DAPM.

> Here the trouble in making it DAPM based is that there is no separate
> control for AIF input and output. It is confirmed that AIF_EN is the
> master control bit, which enables both output as well as input. The AIF
> _OE bit is redundant. If we use the same control bit(i.e AIF_EN) for
> both DAPM_AIF_IN and DAPM_AIF_OUT, there will be obvious side effects.
> Is there any other way to take care of this? Or should we leave it
> outside DAPM?

Use a supply widget.
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