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Message-Id: <1419340158-20567-3-git-send-email-p.zabel@pengutronix.de>
Date: Tue, 23 Dec 2014 14:09:17 +0100
From: Philipp Zabel <p.zabel@...gutronix.de>
To: Grant Likely <grant.likely@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
David Airlie <airlied@...ux.ie>,
Mauro Carvalho Chehab <m.chehab@...sung.com>,
Russell King <rmk+kernel@....linux.org.uk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrzej Hajda <a.hajda@...sung.com>,
Tomi Valkeinen <tomi.valkeinen@...com>,
Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
kernel@...gutronix.de, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v7 2/3] 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@...gutronix.de>
Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.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
--
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