linux-kernel - Re: [alsa-devel] [Device-drivers-devel] [PATCH] Add driver for Analog Devices ADAU1701 SigmaDSP

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Date:	Mon, 7 Mar 2011 11:44:01 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	cliff.cai@...log.com, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org,
	device-drivers-devel@...ckfin.uclinux.org,
	akpm@...ux-foundation.org, lrg@...mlogic.co.uk
Subject: Re: [alsa-devel] [Device-drivers-devel] [PATCH] Add driver for
	Analog Devices ADAU1701 SigmaDSP

On Sun, Mar 06, 2011 at 09:44:49PM -0500, Mike Frysinger wrote:
> On Sun, Mar 6, 2011 at 20:11,  <cliff.cai@...log.com> wrote:

> > +static u32 adau1701_read_register(struct snd_soc_codec *codec,
> > + ?? ?? ?? u16 reg_address, u8 length)
> > +{

> this func has "u32" for ret, and you return the raw register value
> below.  but here you try returning -EIO.  shouldnt it be "int" so the
> caller can check for "< 0" ?

This is the interface we have, unfortuantely.  It's not ideal but it'd
be a complete pain to change it and the actual benefit in production is
questionable given our lack of options for dealing with them in typical
systems beyond moaning in logs.

> > +struct snd_soc_dai_driver adau1701_dai = {
> > + ?? ?? ?? .name = "ADAU1701",

> i think the standard is to use all lower case

Typically, yes.

> > +MODULE_DESCRIPTION("ASoC ADAU1701 SigmaDSP driver");
> > +MODULE_AUTHOR("Cliff Cai");
> > +MODULE_LICENSE("GPL");

> MODULE_ALIAS() ?

That's not needed for I2C devices, it's handled by MODULE_DEVICE_TABLE()
for I2C.
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