linux-kernel - Re: [v5 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of speaker

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Date:   Mon, 21 Mar 2022 11:59:17 +0800
From:   Tzung-Bi Shih <tzungbi@...nel.org>
To:     Jiaxin Yu <jiaxin.yu@...iatek.com>
Cc:     broonie@...nel.org, robh+dt@...nel.org, devicetree@...r.kernel.org,
        linmq006@...il.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        linux-mediatek@...ts.infradead.org, trevor.wu@...iatek.com,
        matthias.bgg@...il.com, aaronyu@...gle.com,
        linux-arm-kernel@...ts.infradead.org,
        angelogioacchino.delregno@...labora.com
Subject: Re: [v5 2/4] ASoC: mediatek: mt8192: refactor for I2S3 DAI link of
 speaker

On Sat, Mar 19, 2022 at 07:41:09PM +0800, Jiaxin Yu wrote:
>  static int mt8192_mt6359_dev_probe(struct platform_device *pdev)
[...]
> +	hdmi_codec = of_parse_phandle(pdev->dev.of_node, "mediatek,hdmi-codec", 0);
> +	if (!hdmi_codec) {
>  		ret = -EINVAL;
> -		goto put_platform_node;
> +		dev_err_probe(&pdev->dev, ret, "Property 'hdmi-codec' missing or invalid\n");
> +		goto err_hdmi_codec;
>  	}
> -	card->dev = &pdev->dev;
>  
> -	hdmi_codec = of_parse_phandle(pdev->dev.of_node,
> -				      "mediatek,hdmi-codec", 0);
> +	speaker_codec = of_get_child_by_name(pdev->dev.of_node, "mediatek,speaker-codec");
> +	if (!speaker_codec) {
> +		ret = -EINVAL;
> +		dev_err_probe(&pdev->dev, ret, "Property 'speaker_codec' missing or invalid\n");
> +		goto err_speaker_codec;
> +	}

(to be neat) Does it have any reason to prevent from using of_parse_phandle()
but of_get_child_by_name()?