[PATCH] drm: bridge: it66121: Extend match support for OF tables

[Laurent Pinchart]

Hi Biju,

Thank you for the patch.

On Sun, Aug 13, 2023 at 09:05:20AM +0100, Biju Das wrote:
> The driver has OF match table, still it uses ID lookup table for
> retrieving match data. Replace ID look up with i2c_get_match_data()
> for retrieving OF/ACPI/I2C match data by adding similar match data for
> OF table.

Could you please explain in the commit message *why* this is desired ?

> While at it, drop unused local varibale id from probe().

I'd drop this sentence, that's not a "while at it" change but an
integral part of this patch.

> Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> ---
>  This patch is only compile tested.
> ---
>  drivers/gpu/drm/bridge/ite-it66121.c | 17 ++++++++---------
>  1 file changed, 8 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
> index 466641c77fe9..a80246ef4ffe 100644
> --- a/drivers/gpu/drm/bridge/ite-it66121.c
> +++ b/drivers/gpu/drm/bridge/ite-it66121.c
> @@ -1501,7 +1501,6 @@ static const char * const it66121_supplies[] = {
>  
>  static int it66121_probe(struct i2c_client *client)
>  {
> -	const struct i2c_device_id *id = i2c_client_get_device_id(client);
>  	u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
>  	struct device_node *ep;
>  	int ret;
> @@ -1523,7 +1522,7 @@ static int it66121_probe(struct i2c_client *client)
>  
>  	ctx->dev = dev;
>  	ctx->client = client;
> -	ctx->info = (const struct it66121_chip_info *) id->driver_data;
> +	ctx->info = i2c_get_match_data(client);
>  
>  	of_property_read_u32(ep, "bus-width", &ctx->bus_width);
>  	of_node_put(ep);
> @@ -1609,13 +1608,6 @@ static void it66121_remove(struct i2c_client *client)
>  	mutex_destroy(&ctx->lock);
>  }
>  
> -static const struct of_device_id it66121_dt_match[] = {
> -	{ .compatible = "ite,it66121" },
> -	{ .compatible = "ite,it6610" },
> -	{ }
> -};
> -MODULE_DEVICE_TABLE(of, it66121_dt_match);
> -
>  static const struct it66121_chip_info it66121_chip_info = {
>  	.id = ID_IT66121,
>  	.vid = 0x4954,
> @@ -1628,6 +1620,13 @@ static const struct it66121_chip_info it6610_chip_info = {
>  	.pid = 0x0611,
>  };
>  
> +static const struct of_device_id it66121_dt_match[] = {
> +	{ .compatible = "ite,it66121", &it66121_chip_info },
> +	{ .compatible = "ite,it6610", &it6610_chip_info },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, it66121_dt_match);
> +
>  static const struct i2c_device_id it66121_id[] = {
>  	{ "it66121", (kernel_ulong_t) &it66121_chip_info },
>  	{ "it6610", (kernel_ulong_t) &it6610_chip_info },

-- 
Regards,

Laurent Pinchart