linux-kernel - Re: [PATCH 1/2] ASoC: mediatek: mt8195: update control for RT5682 series

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Message-ID: <YbrId5gnJSjeT1Ni@google.com>
Date:   Thu, 16 Dec 2021 13:02:47 +0800
From:   Tzung-Bi Shih <tzungbi@...gle.com>
To:     Trevor Wu <trevor.wu@...iatek.com>
Cc:     broonie@...nel.org, tiwai@...e.com, robh+dt@...nel.org,
        matthias.bgg@...il.com, alsa-devel@...a-project.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, jiaxin.yu@...iatek.com,
        shumingf@...ltek.com
Subject: Re: [PATCH 1/2] ASoC: mediatek: mt8195: update control for RT5682
 series

On Thu, Dec 16, 2021 at 11:37:34AM +0800, Trevor Wu wrote:
> On Wed, 2021-12-15 at 16:20 +0800, Tzung-Bi Shih wrote:
> > On Wed, Dec 15, 2021 at 02:58:34PM +0800, Trevor Wu wrote:
> > > @@ -1072,6 +1119,19 @@ static int
> > > mt8195_mt6359_rt1011_rt5682_dev_probe(struct platform_device *pdev)
> > >  		return -EINVAL;
> > >  	}
> > >  
> > > +	priv->i2so1_mclk = devm_clk_get(&pdev->dev, "i2so1_mclk");
> > > +	if (IS_ERR(priv->i2so1_mclk)) {
> > > +		ret = PTR_ERR(priv->i2so1_mclk);
> > > +		if (ret == -ENOENT) {
> > > +			dev_dbg(&pdev->dev,
> > > +				"Failed to get i2so1_mclk, defer
> > > probe\n");
> > > +			return -EPROBE_DEFER;
> > > +		}
> > 
> > Does devm_clk_get_optional() could make the block more concise?
> 
> Even though we use devm_clk_get_optional, we still have to handle the
> (-ENOENT) case in probe function. In my opinion, original
> implementation could be kept.

I am neutral to my original suggestion but devm_clk_get_optional() returns NULL if -ENONENT.