diff --git a/drivers/mfd/t7l66xb.c b/drivers/mfd/t7l66xb.c
index bcf4687d4af5686132c5a155027b595588cf8390..e0bbddd7aac254b56af2edaaa64c834e5ab7bc1c 100644
--- a/drivers/mfd/t7l66xb.c
+++ b/drivers/mfd/t7l66xb.c
@@ -360,7 +360,7 @@ static int t7l66xb_probe(struct platform_device *dev)
 	if (ret)
 		goto err_request_scr;
 
-	t7l66xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
+	t7l66xb->scr = ioremap(rscr->start, resource_size(rscr));
 	if (!t7l66xb->scr) {
 		ret = -ENOMEM;
 		goto err_ioremap;