linux-kernel - Re: [PATCH 2/3] ASoC: meson: aiu: introduce a struct for platform specific information

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Date:   Fri, 21 Feb 2020 11:41:25 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        broonie@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] ASoC: meson: aiu: introduce a struct for platform specific information


On Thu 20 Feb 2020 at 21:57, Martin Blumenstingl <martin.blumenstingl@...glemail.com> wrote:

> Introduce a struct aiu_platform_data to make the driver aware of
> platform specific information. Convert the existing check for the
> internal stereo audio codec (only available on GXL) to this new struct.
> Support for the 32-bit SoCs will need this as well because the
> AIU_CLK_CTRL_MORE register doesn't have the I2S divider bits (and we
> need to use the I2S divider from AIU_CLK_CTRL instead).
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

Reviewed-by: Jerome Brunet <jbrunet@...libre.com>

> ---
>  sound/soc/meson/aiu.c | 19 ++++++++++++++++---
>  sound/soc/meson/aiu.h |  5 +++++
>  2 files changed, 21 insertions(+), 3 deletions(-)
>
> diff --git a/sound/soc/meson/aiu.c b/sound/soc/meson/aiu.c
> index d3e2d40e9562..38209312a8c3 100644
> --- a/sound/soc/meson/aiu.c
> +++ b/sound/soc/meson/aiu.c
> @@ -273,6 +273,11 @@ static int aiu_probe(struct platform_device *pdev)
>  	aiu = devm_kzalloc(dev, sizeof(*aiu), GFP_KERNEL);
>  	if (!aiu)
>  		return -ENOMEM;
> +
> +	aiu->platform = device_get_match_data(dev);
> +	if (!aiu->platform)
> +		return -ENODEV;
> +
>  	platform_set_drvdata(pdev, aiu);
>  
>  	ret = device_reset(dev);
> @@ -322,7 +327,7 @@ static int aiu_probe(struct platform_device *pdev)
>  	}
>  
>  	/* Register the internal dac control component on gxl */
> -	if (of_device_is_compatible(dev->of_node, "amlogic,aiu-gxl")) {
> +	if (aiu->platform->has_acodec) {
>  		ret = aiu_acodec_ctrl_register_component(dev);
>  		if (ret) {
>  			dev_err(dev,
> @@ -344,9 +349,17 @@ static int aiu_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct aiu_platform_data aiu_gxbb_pdata = {
> +	.has_acodec = false,
> +};
> +
> +static const struct aiu_platform_data aiu_gxl_pdata = {
> +	.has_acodec = true,
> +};
> +
>  static const struct of_device_id aiu_of_match[] = {
> -	{ .compatible = "amlogic,aiu-gxbb", },
> -	{ .compatible = "amlogic,aiu-gxl", },
> +	{ .compatible = "amlogic,aiu-gxbb", .data = &aiu_gxbb_pdata },
> +	{ .compatible = "amlogic,aiu-gxl", .data = &aiu_gxl_pdata },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, aiu_of_match);
> diff --git a/sound/soc/meson/aiu.h b/sound/soc/meson/aiu.h
> index 06a968c55728..ab003638d5e5 100644
> --- a/sound/soc/meson/aiu.h
> +++ b/sound/soc/meson/aiu.h
> @@ -27,11 +27,16 @@ struct aiu_interface {
>  	int irq;
>  };
>  
> +struct aiu_platform_data {
> +	bool has_acodec;
> +};
> +
>  struct aiu {
>  	struct clk *pclk;
>  	struct clk *spdif_mclk;
>  	struct aiu_interface i2s;
>  	struct aiu_interface spdif;
> +	const struct aiu_platform_data *platform;
>  };
>  
>  #define AIU_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |	\