diff mbox series

[v3,7/7] media: rcar-isp: Parse named cs memory region

Message ID 20250423163113.2961049-8-niklas.soderlund+renesas@ragnatech.se
State New
Headers show
Series rcar-isp: Prepare for ISP core support | expand

Commit Message

Niklas Söderlund April 23, 2025, 4:31 p.m. UTC 
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 describes only the ISP channel select
function.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
* Changes since v2
- Fix spelling in commit message.
- Fix comment style.
- Use devm_platform_ioremap_resource().
---
 drivers/media/platform/renesas/rcar-isp/csisp.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/renesas/rcar-isp/csisp.c b/drivers/media/platform/renesas/rcar-isp/csisp.c
index f36d43c2e0a2..1eb29a0b774a 100644
--- a/drivers/media/platform/renesas/rcar-isp/csisp.c
+++ b/drivers/media/platform/renesas/rcar-isp/csisp.c
@@ -465,7 +465,18 @@  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
+	 * reg-names are set in DT.
+	 */
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cs");
+	if (!res)
+		isp->csbase = devm_platform_ioremap_resource(pdev, 0);
+	else
+		isp->csbase = devm_ioremap_resource(&pdev->dev, res);
+
 	if (IS_ERR(isp->csbase))
 		return PTR_ERR(isp->csbase);