Re: [PATCH v2 7/7] media: rcar-isp: Parse named cs memory region

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Niklas,

Thank you for the patch.

On Mon, Apr 21, 2025 at 01:12:40PM +0200, Niklas Söderlund wrote:
> Extend the device tree parsing to optionally parse the cs memory region
> by name. The change is backward compatible with the device tree model
> where a single unnamed region describing only the ISP channel select

s/decribing/describes/

> function.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
> ---
>  drivers/media/platform/renesas/rcar-isp/csisp.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/renesas/rcar-isp/csisp.c b/drivers/media/platform/renesas/rcar-isp/csisp.c
> index f36d43c2e0a2..0b6fa62467e4 100644
> --- a/drivers/media/platform/renesas/rcar-isp/csisp.c
> +++ b/drivers/media/platform/renesas/rcar-isp/csisp.c
> @@ -465,7 +465,17 @@ static const struct media_entity_operations risp_entity_ops = {
>  static int risp_probe_resources(struct rcar_isp *isp,
>  				struct platform_device *pdev)
>  {
> -	isp->csbase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
> +	struct resource *res;
> +
> +	/* For backward compatibility allow cs base to be the only reg if no

	/*
	 * For backward compatibility allow cs base to be the only reg if no

> +	 * reg-names are set in DT.
> +	 */
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cs");
> +	if (!res)
> +		isp->csbase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);

You can call devm_platform_ioremap_resource().

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

> +	else
> +		isp->csbase = devm_ioremap_resource(&pdev->dev, res);
> +
>  	if (IS_ERR(isp->csbase))
>  		return PTR_ERR(isp->csbase);
>  

-- 
Regards,

Laurent Pinchart