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
function.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
---
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 a86d2a9a4915..931c8e3a22be 100644
--- a/drivers/media/platform/renesas/rcar-isp/csisp.c
+++ b/drivers/media/platform/renesas/rcar-isp/csisp.c
@@ -419,7 +419,17 @@ 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
+ * 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);
+ else
+ isp->csbase = devm_ioremap_resource(&pdev->dev, res);
+
if (IS_ERR(isp->csbase))
return PTR_ERR(isp->csbase);
--
2.48.1
