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author | Philipp Zabel <p.zabel@pengutronix.de> | 2014-04-14 17:53:25 +0200 |
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committer | Philipp Zabel <p.zabel@pengutronix.de> | 2015-02-23 11:42:23 +0100 |
commit | ee8905963ed0bc9dfc0952dc35e16e233c10e212 (patch) | |
tree | 6cfbd1cfb1af19c550a6a3e263f3fb63c625d0d0 | |
parent | f033c0bcc53675562200680f4cb4a86710d9fbae (diff) | |
download | op-kernel-dev-ee8905963ed0bc9dfc0952dc35e16e233c10e212.zip op-kernel-dev-ee8905963ed0bc9dfc0952dc35e16e233c10e212.tar.gz |
of: Add for_each_endpoint_of_node helper macro
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>
-rw-r--r-- | include/linux/of_graph.h | 11 |
1 files changed, 11 insertions, 0 deletions
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); |