linux-kernel - Re: [PATCH v1 2/4] ASoC: codecs: pcm179x: Add support for PCM1789

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Date:   Thu, 1 Mar 2018 08:47:13 +0100
From:   Mylène Josserand <mylene.josserand@...tlin.com>
To:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, alexandre.belloni@...tlin.com
Subject: Re: [PATCH v1 2/4] ASoC: codecs: pcm179x: Add support for PCM1789

Hello,

On Tue, 27 Feb 2018 22:56:29 +0100
Thomas Petazzoni <thomas.petazzoni@...tlin.com> wrote:

> Hello,
> 
> On Tue, 27 Feb 2018 22:24:31 +0100, Mylène Josserand wrote:
> 
> > diff --git a/sound/soc/codecs/pcm179x-i2c.c b/sound/soc/codecs/pcm179x-i2c.c
> > index 795a0657c097..83a2e1508df8 100644
> > --- a/sound/soc/codecs/pcm179x-i2c.c
> > +++ b/sound/soc/codecs/pcm179x-i2c.c
> > @@ -26,10 +26,13 @@
> >  static int pcm179x_i2c_probe(struct i2c_client *client,
> >  			      const struct i2c_device_id *id)
> >  {
> > -	struct regmap *regmap;
> > +	struct regmap *regmap = NULL;  
> 
> I don't think this change is useful, since regmap is always initialized
> below anyway.

okay.

> 
> 
> > +	if (mute)
> > +		val = ~(PCM1789_MUTE_L_EN | PCM1789_MUTE_R_EN);  
> 
> That's not really useful with regmap_update_bits() which already does
> the masking, no?

Yep

> 
> > +	else
> > +		val = PCM1789_MUTE_L_EN | PCM1789_MUTE_R_EN;
> > +	ret = regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
> > +				 PCM1789_MUTE_MASK, val);  
> 
> Couldn't this be:
> 
> 	if (mute)
> 		val = 0;
> 	else
> 		val = PCM1789_MUTE_MASK;
> 
> 	ret = regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
> 				 PCM1789_MUTE_MASK, val);
> 

I will update my V2 with it.

> 
> > +static struct snd_soc_dai_driver pcm1789_dai = {
> > +	.name = "pcm1789-hifi",
> > +	.playback = {
> > +		.stream_name = "Playback",
> > +		.channels_min = 2,
> > +		.channels_max = 2,
> > +		.rates = SNDRV_PCM_RATE_CONTINUOUS,
> > +		.rate_min = 10000,
> > +		.rate_max = 200000,
> > +		.formats = PCM1792A_FORMATS, },  
> 
> Nit: the closing curly brace should be on a separate line.

Yep, thanks.

> 
> 
> > +	if (type == PCM1789)
> > +		return devm_snd_soc_register_component(dev,
> > +						       &soc_component_dev_pcm1789,
> > +						       &pcm1789_dai, 1);
> > +  
> 
> Perhaps a "else" here ?

Sure

> 
> >  	return devm_snd_soc_register_component(dev,
> >  			&soc_component_dev_pcm179x, &pcm179x_dai, 1);  
> 
> Thanks!
> 
> Thomas

Thank you,

Mylène

-- 
Mylène Josserand, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com