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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-11-09 23:36:04 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-13 08:38:18 +0200 |
commit | 6913850321aaa3464ab3dad7b05ff06d02462ec8 (patch) | |
tree | e4df2b195ae2e21c099234c60f904d23389299ea | |
parent | cc44a37924447f5e0cd2bf6900280a43ccbd7e50 (diff) | |
download | barebox-6913850321aaa3464ab3dad7b05ff06d02462ec8.tar.gz barebox-6913850321aaa3464ab3dad7b05ff06d02462ec8.tar.xz |
of_graph: add of_graph_port_is_available
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r-- | drivers/of/base.c | 22 | ||||
-rw-r--r-- | include/of_graph.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index b3718e71ea..8dd04ca3ce 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2210,3 +2210,25 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node) return np->parent; } EXPORT_SYMBOL(of_graph_get_remote_port); + +int of_graph_port_is_available(struct device_node *node) +{ + struct device_node *endpoint; + int available = 0; + + for_each_child_of_node(node, endpoint) { + struct device_node *remote_parent; + + remote_parent = of_graph_get_remote_port_parent(endpoint); + if (!remote_parent) + continue; + + if (!of_device_is_available(remote_parent)) + continue; + + available = 1; + } + + return available; +} +EXPORT_SYMBOL(of_graph_port_is_available); diff --git a/include/of_graph.h b/include/of_graph.h index fa037dbf75..254dd2ca28 100644 --- a/include/of_graph.h +++ b/include/of_graph.h @@ -45,5 +45,6 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, struct device_node *of_graph_get_remote_port_parent( const struct device_node *node); struct device_node *of_graph_get_remote_port(const struct device_node *node); +int of_graph_port_is_available(struct device_node *node); #endif /* __LINUX_OF_GRAPH_H */ |