linux-kernel - Re: [alsa-devel] [PATCH v3 1/4] ASoC: samsung: Add machine driver for Trats2

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Date:	Thu, 22 Jan 2015 13:16:03 +0100
From:	Sylwester Nawrocki <s.nawrocki@...sung.com>
To:	Inha Song <ideal.song@...sung.com>
Cc:	alsa-devel@...a-project.org, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linux@....linux.org.uk, kgene@...nel.org, sbkim73@...sung.com,
	lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
	tiwai@...e.de, grant.likely@...aro.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH v3 1/4] ASoC: samsung: Add machine driver for
 Trats2

On 22/01/15 12:17, Inha Song wrote:
> diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
> index fc67f97..8031423 100644
> --- a/sound/soc/samsung/Kconfig
> +++ b/sound/soc/samsung/Kconfig
> @@ -245,3 +245,11 @@ config SND_SOC_ARNDALE_RT5631_ALC5631
>          depends on SND_SOC_SAMSUNG
>          select SND_SAMSUNG_I2S
>          select SND_SOC_RT5631
> +
> +config SND_SOC_SAMSUNG_TRATS2_WM1811
> +	tristate "SoC I2S Audio support for WM1811 on Tizen Trats2 board"
> +	depends on SND_SOC_SAMSUNG
> +	select SND_SOC_WM8994
> +	select SND_SAMSUNG_I2S

Shouldn't you also select the MFD part of WM8994 here ?

> +++ b/sound/soc/samsung/trats2_wm1811.c
> @@ -0,0 +1,218 @@

> +static struct snd_soc_dai_link trats2_dai[] = {
> +	{
> +		.name		= "WM1811 AIF1",
> +		.stream_name	= "Pri_Dai",

Could we have a less cryptic name here, e.g. "HiFi Primary" ?

> +		.codec_dai_name = "wm8994-aif1",
> +		.codec_name	= "wm8994-codec",
> +		.ops		= &trats2_aif1_ops,
> +		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> +				  SND_SOC_DAIFMT_CBM_CFM,
> +	},
> +};

> +static int trats2_audio_probe(struct platform_device *pdev)
> +{
> +	struct device_node *np = pdev->dev.of_node;
> +	struct snd_soc_card *card = &trats2_card;
> +	struct device_node *codec_node;
> +	struct snd_soc_dai_link *dai_link = card->dai_link;
> +	struct trats2_machine_priv *priv = snd_soc_card_get_drvdata(card);
> +	int ret;
> +
> +	if (!np) {
> +		dev_err(&pdev->dev, "of node is missing.\n");
> +		return -ENODEV;

I'd say this whole np test could be dropped, we will fail right below
at the snd_soc_of_parse_card_name() function call if np is NULL.
Such a situation seems highly unlikely anyway.

> +	}
> +
> +	card->dev = &pdev->dev;
> +
> +	ret = snd_soc_of_parse_card_name(card, "samsung,model");
> +	if (ret) {
> +		dev_err(&pdev->dev,
> +			"Card name is not provided\n");

I guess it would fit in a single line.

> +		return ret;
> +	}
> +

> +static struct platform_driver trats2_audio_driver = {
> +	.driver = {
> +		.name		= "trats2-audio",
> +		.owner		= THIS_MODULE,

You can drop this .owner field assignment, it's also done in
module_platform_driver() macro.

> +		.pm		= &snd_soc_pm_ops,
> +		.of_match_table	= trats2_audio_of_match,
> +	},
> +	.probe	= trats2_audio_probe,
> +	.remove	= trats2_audio_remove,
> +};
> +
> +module_platform_driver(trats2_audio_driver);

--
Regards,
Sylwester
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