[alsa-devel] [PATCH 1/3] ASoC: fsl_sai: add of_match data

[Daniel Baluta]

On Wed, Jul 17, 2019 at 1:58 PM Lucas Stach <l.stach at pengutronix.de> wrote:
>
> New revisions of the SAI IP block have even more differences that need
> be taken into account by the driver. To avoid sprinking compatible
> checks all over the driver move the current differences into of_match_data.
>
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>

This is the way I handled in my patch series too. So,

Reviewed-by: Daniel Baluta <daniel.baluta at nxp.com>

> ---
>  sound/soc/fsl/fsl_sai.c | 22 ++++++++++++++--------
>  sound/soc/fsl/fsl_sai.h |  6 +++++-
>  2 files changed, 19 insertions(+), 9 deletions(-)
>
> diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
> index 812c94fbb160..3a1ed8b857d6 100644
> --- a/sound/soc/fsl/fsl_sai.c
> +++ b/sound/soc/fsl/fsl_sai.c
> @@ -9,6 +9,7 @@
>  #include <linux/dmaengine.h>
>  #include <linux/module.h>
>  #include <linux/of_address.h>
> +#include <linux/of_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
>  #include <linux/slab.h>
> @@ -798,10 +799,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
>                 return -ENOMEM;
>
>         sai->pdev = pdev;
> -
> -       if (of_device_is_compatible(np, "fsl,imx6sx-sai") ||
> -           of_device_is_compatible(np, "fsl,imx6ul-sai"))
> -               sai->sai_on_imx = true;
> +       sai->soc_data = of_device_get_match_data(&pdev->dev);
>
>         sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
>
> @@ -910,7 +908,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
>         if (ret)
>                 return ret;
>
> -       if (sai->sai_on_imx)
> +       if (sai->soc_data->use_imx_pcm)
>                 return imx_pcm_dma_init(pdev, IMX_SAI_DMABUF_SIZE);
>         else
>                 return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
> @@ -923,10 +921,18 @@ static int fsl_sai_remove(struct platform_device *pdev)
>         return 0;
>  }
>
> +static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
> +       .use_imx_pcm = false,
> +};
> +
> +static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
> +       .use_imx_pcm = true,
> +};
> +
>  static const struct of_device_id fsl_sai_ids[] = {
> -       { .compatible = "fsl,vf610-sai", },
> -       { .compatible = "fsl,imx6sx-sai", },
> -       { .compatible = "fsl,imx6ul-sai", },
> +       { .compatible = "fsl,vf610-sai", .data = &fsl_sai_vf610_data },
> +       { .compatible = "fsl,imx6sx-sai", .data = &fsl_sai_imx6sx_data },
> +       { .compatible = "fsl,imx6ul-sai", .data = &fsl_sai_imx6sx_data },
>         { /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, fsl_sai_ids);
> diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
> index 24cb156bf995..83e2bfe05b1b 100644
> --- a/sound/soc/fsl/fsl_sai.h
> +++ b/sound/soc/fsl/fsl_sai.h
> @@ -126,6 +126,10 @@
>  #define FSL_SAI_MAXBURST_TX 6
>  #define FSL_SAI_MAXBURST_RX 6
>
> +struct fsl_sai_soc_data {
> +       bool use_imx_pcm;
> +};
> +
>  struct fsl_sai {
>         struct platform_device *pdev;
>         struct regmap *regmap;
> @@ -135,7 +139,6 @@ struct fsl_sai {
>         bool is_slave_mode;
>         bool is_lsb_first;
>         bool is_dsp_mode;
> -       bool sai_on_imx;
>         bool synchronous[2];
>
>         unsigned int mclk_id[2];
> @@ -143,6 +146,7 @@ struct fsl_sai {
>         unsigned int slots;
>         unsigned int slot_width;
>
> +       const struct fsl_sai_soc_data *soc_data;
>         struct snd_dmaengine_dai_dma_data dma_params_rx;
>         struct snd_dmaengine_dai_dma_data dma_params_tx;
>  };
> --
> 2.20.1
>
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