linux-kernel - Re: [PATCH 2/3] ASoC: mediatek: Add machine driver for MAX98090 codec

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Date:	Mon, 15 Jun 2015 10:31:45 +0800
From:	Koro Chen <koro.chen@...iatek.com>
To:	Mark Brown <broonie@...nel.org>
CC:	<robh+dt@...nel.org>, <matthias.bgg@...il.com>, <perex@...ex.cz>,
	<tiwai@...e.de>, <srv_heupstream@...iatek.com>,
	<linux-mediatek@...ts.infradead.org>, <s.hauer@...gutronix.de>,
	<galak@...eaurora.org>, <lgirdwood@...il.com>,
	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>
Subject: Re: [PATCH 2/3] ASoC: mediatek: Add machine driver for MAX98090
 codec

On Fri, 2015-06-12 at 14:13 +0100, Mark Brown wrote:
> On Wed, Jun 10, 2015 at 10:24:35PM +0800, Koro Chen wrote:
> 
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/sound/mt8173-max98090.txt
> > @@ -0,0 +1,17 @@
> > +MT8173 with MAX98090 CODEC
> > +
> > +Required properties:
> > +- compatible : "mediatek,mt8173-max98090"
> > +- mediatek,audio-codec: the phandle of the MAX98090 audio codec
> > +- dvdd-supply : the phandle of regulator to supply 1.2V
> > +- avdd-supply : the phandle of regulator to supply 1.8V
> 
> Why are these supplies part of the machine driver?
> 
These are for the codec as you said. I think I should remove all these
supplies as well as codes in machine drivers, since now the regulators
are configured during the board's bootloader stage.

> > +config SND_SOC_MT8173_MAX98090
> > +	bool "ASoC Audio driver for MT8173 with MAX98090 codec"
> 
> Why bool?
> 
This should be tristate as Paul mentioned before. I will fix it.
> > +	codec_node = of_parse_phandle(pdev->dev.of_node,
> > +				      "mediatek,audio-codec", 0);
> > +	if (!codec_node) {
> > +		dev_err(&pdev->dev,
> > +			"Property 'audio-codec' missing or invalid\n");
> > +	} else {
> 
> Isn't this a fatal error?
> 
Thank you and yes it should be fatal, I will fix it.




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