linux-kernel - Re: [PATCH v3 4/7] ASoC: codecs: Add RK3308 internal audio codec driver

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Date: Wed, 21 Feb 2024 14:21:23 +0100
From: Philipp Zabel <p.zabel@...gutronix.de>
To: Luca Ceresoli <luca.ceresoli@...tlin.com>, Nicolas Frattaroli
 <frattaroli.nicolas@...il.com>, Liam Girdwood <lgirdwood@...il.com>, Mark
 Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai
 <tiwai@...e.com>, Heiko Stuebner <heiko@...ech.de>, Rob Herring
 <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>,  Conor Dooley <conor+dt@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
	linux-rockchip@...ts.infradead.org, linux-sound@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 4/7] ASoC: codecs: Add RK3308 internal audio codec
 driver

On Mi, 2024-02-21 at 11:22 +0100, Luca Ceresoli wrote:
> Add driver for the internal audio codec of the Rockchip RK3308 SoC.
> 
> Initially based on the vendor kernel driver [0], with lots of cleanups,
> fixes, improvements, conversion to DAPM and removal of some features.
> 
> [0] https://github.com/rockchip-linux/kernel/blob/develop-4.19/sound/soc/codecs/rk3308_codec.c
> 
> Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
>
[...]
> diff --git a/sound/soc/codecs/rk3308_codec.c b/sound/soc/codecs/rk3308_codec.c
> new file mode 100644
> index 000000000000..61bfb75f92a3
> --- /dev/null
> +++ b/sound/soc/codecs/rk3308_codec.c
> @@ -0,0 +1,993 @@
[...]
> +static int rk3308_codec_platform_probe(struct platform_device *pdev)
> +{
[...]
> +	rk3308->reset = devm_reset_control_get(&pdev->dev, "codec");
> +	if (IS_ERR(rk3308->reset)) {
> +		err = PTR_ERR(rk3308->reset);
> +		if (err != -ENOENT)
> +			return err;
> +
> +		dev_dbg(&pdev->dev, "No reset control found\n");
> +		rk3308->reset = NULL;
> +	}

Please use devm_reset_control_get_optional_exclusive(). That already
returns NULL instead of -ENOENT if the reset control is not specified
in the device tree. Then dev_err_probe() can be used to report errors.


regards
Philipp