[PATCH v8 2/3] of: Add for_each_endpoint_of_node helper macro
From: p.zabel@pengutronix.de (Philipp Zabel)
Date: 2015-02-23 10:55:01
Also in:
dri-devel, linux-media, lkml
Subsystem:
open firmware and flattened device tree, the rest · Maintainers:
Rob Herring, Saravana Kannan, Linus Torvalds
Note that while of_graph_get_next_endpoint decrements the reference count of the child node passed to it, of_node_put(child) still has to be called manually when breaking out of the loop. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> --- include/linux/of_graph.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index befef42..e43442e 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h@@ -26,6 +26,17 @@ struct of_endpoint { const struct device_node *local_node; }; +/** + * for_each_endpoint_of_node - iterate over every endpoint in a device node + * @parent: parent device node containing ports and endpoints + * @child: loop variable pointing to the current endpoint node + * + * When breaking out of the loop, of_node_put(child) has to be called manually. + */ +#define for_each_endpoint_of_node(parent, child) \ + for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \ + child = of_graph_get_next_endpoint(parent, child)) + #ifdef CONFIG_OF int of_graph_parse_endpoint(const struct device_node *node, struct of_endpoint *endpoint);
--
2.1.4