linux-kernel - Re: [alsa-devel] [PATCH 2/3] ASoC: tas571x: New driver for TI TAS571x power amplifiers

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Message-ID: <20150418113957.GF26185@sirena.org.uk>
Date:	Sat, 18 Apr 2015 12:39:57 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Kevin Cernekee <cernekee@...omium.org>, lgirdwood@...il.com,
	devicetree@...r.kernel.org, alsa-devel@...a-project.org,
	abrestic@...omium.org, linux-kernel@...r.kernel.org,
	dgreid@...omium.org, olofj@...omium.org
Subject: Re: [alsa-devel] [PATCH 2/3] ASoC: tas571x: New driver for TI
 TAS571x power amplifiers

On Thu, Apr 16, 2015 at 02:57:49PM +0200, Lars-Peter Clausen wrote:
> On 04/15/2015 11:42 PM, Kevin Cernekee wrote:

> >+	case TAS571X_ID_5711:
> >+		priv->codec_driver.controls = tas5711_controls;
> >+		priv->codec_driver.num_controls = ARRAY_SIZE(tas5711_controls);
> >+		break;
> >+	case TAS571X_ID_5717:
> >+	case TAS571X_ID_5719:
> >+		priv->codec_driver.controls = tas5717_controls;
> >+		priv->codec_driver.num_controls = ARRAY_SIZE(tas5717_controls);

> Typically when a driver supports multiple chips with different control sets
> the snd_soc_codec_driver implements a probe callback in which the correct
> controls are registered.

I'm fine with doing it with tables (though just having two static CODEC
driver structures would be a bit cleaner).  The pattern with probe() is
usually that there's some base set of controls all the devices have
which then gets device specific controls/routes/whatever added to it so
you get benefits fromm sharing the table but in this case the table is
so tiny anyway that I'm not sure it's worth caring.

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