From 6913850321aaa3464ab3dad7b05ff06d02462ec8 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Sun, 9 Nov 2014 23:36:04 +0100 Subject: of_graph: add of_graph_port_is_available Signed-off-by: Sascha Hauer --- drivers/of/base.c | 22 ++++++++++++++++++++++ include/of_graph.h | 1 + 2 files changed, 23 insertions(+) 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 */ -- cgit v1.2.3