ofnode: add {ofnode, dev}_read_resource_byname()
Linux supports platform_get_resource_byname() to look up a resource
by name.
We want a similar helper. It is useful when a device node has named
register regions.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index c1a2e9f..0685b68 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -627,3 +627,15 @@
return 0;
}
}
+
+int ofnode_read_resource_byname(ofnode node, const char *name,
+ struct resource *res)
+{
+ int index;
+
+ index = ofnode_stringlist_search(node, "reg-names", name);
+ if (index < 0)
+ return index;
+
+ return ofnode_read_resource(node, index, res);
+}
diff --git a/drivers/core/read.c b/drivers/core/read.c
index fe40bed..6acb333 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -164,3 +164,9 @@
{
return ofnode_read_resource(dev_ofnode(dev), index, res);
}
+
+int dev_read_resource_byname(struct udevice *dev, const char *name,
+ struct resource *res)
+{
+ return ofnode_read_resource_byname(dev_ofnode(dev), name, res);
+}