linux-kernel - Re: [PATCH 1/2] media: i2c: mt9v032: Extend match support for OF tables

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Date:   Mon, 11 Sep 2023 11:14:06 +0200
From:   Jacopo Mondi <jacopo.mondi@...asonboard.com>
To:     Biju Das <biju.das.jz@...renesas.com>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Biju Das <biju.das.au@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH 1/2] media: i2c: mt9v032: Extend match support for OF
 tables

Hi Biju

On Sun, Sep 10, 2023 at 05:54:31PM +0100, Biju Das wrote:
> The driver has an OF match table, still, it uses an ID lookup table for
> retrieving match data. Currently, the driver is working on the
> assumption that an I2C device registered via OF will always match a
> legacy I2C device ID. The correct approach is to have an OF device ID
> table using i2c_get_match_data() if the devices are registered via OF/ID.
>
> Unify the OF/ID table by using mt9v032_model_info as match data for both

s/Unify/Align ? As the tables are still separate..

> these tables and replace the ID lookup table for the match data by
> i2c_get_match_data() and simplifly probe().
>
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>

Reviewed-by: Jacopo Mondi <jacopo.mondi+renesas@...asonboard.com>

Thanks
  j


> ---
>  drivers/media/i2c/mt9v032.c | 21 ++++++++++-----------
>  1 file changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
> index 00e7bc6e3235..0f448aa27e53 100644
> --- a/drivers/media/i2c/mt9v032.c
> +++ b/drivers/media/i2c/mt9v032.c
> @@ -1046,7 +1046,6 @@ mt9v032_get_pdata(struct i2c_client *client)
>
>  static int mt9v032_probe(struct i2c_client *client)
>  {
> -	const struct i2c_device_id *did = i2c_client_get_device_id(client);
>  	struct mt9v032_platform_data *pdata = mt9v032_get_pdata(client);
>  	struct mt9v032 *mt9v032;
>  	unsigned int i;
> @@ -1076,7 +1075,7 @@ static int mt9v032_probe(struct i2c_client *client)
>
>  	mutex_init(&mt9v032->power_lock);
>  	mt9v032->pdata = pdata;
> -	mt9v032->model = (const void *)did->driver_data;
> +	mt9v032->model = i2c_get_match_data(client);
>
>  	v4l2_ctrl_handler_init(&mt9v032->ctrls, 11 +
>  			       ARRAY_SIZE(mt9v032_aegc_controls));
> @@ -1272,20 +1271,20 @@ static const struct i2c_device_id mt9v032_id[] = {
>  	{ "mt9v032m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V032_MONO] },
>  	{ "mt9v034", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_COLOR] },
>  	{ "mt9v034m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_MONO] },
> -	{ }
> +	{ /* Sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(i2c, mt9v032_id);
>
>  #if IS_ENABLED(CONFIG_OF)
>  static const struct of_device_id mt9v032_of_match[] = {
> -	{ .compatible = "aptina,mt9v022" },
> -	{ .compatible = "aptina,mt9v022m" },
> -	{ .compatible = "aptina,mt9v024" },
> -	{ .compatible = "aptina,mt9v024m" },
> -	{ .compatible = "aptina,mt9v032" },
> -	{ .compatible = "aptina,mt9v032m" },
> -	{ .compatible = "aptina,mt9v034" },
> -	{ .compatible = "aptina,mt9v034m" },
> +	{ .compatible = "aptina,mt9v022", .data = &mt9v032_models[MT9V032_MODEL_V022_COLOR] },
> +	{ .compatible = "aptina,mt9v022m", .data = &mt9v032_models[MT9V032_MODEL_V022_MONO] },
> +	{ .compatible = "aptina,mt9v024", .data = &mt9v032_models[MT9V032_MODEL_V024_COLOR] },
> +	{ .compatible = "aptina,mt9v024m", .data = &mt9v032_models[MT9V032_MODEL_V024_MONO] },
> +	{ .compatible = "aptina,mt9v032", .data = &mt9v032_models[MT9V032_MODEL_V032_COLOR] },
> +	{ .compatible = "aptina,mt9v032m", .data = &mt9v032_models[MT9V032_MODEL_V032_MONO] },
> +	{ .compatible = "aptina,mt9v034", .data = &mt9v032_models[MT9V032_MODEL_V034_COLOR] },
> +	{ .compatible = "aptina,mt9v034m", .data = &mt9v032_models[MT9V032_MODEL_V034_MONO] },
>  	{ /* Sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, mt9v032_of_match);
> --
> 2.25.1
>