Pull fsys_gettimeofday into release branch

[pandora-kernel.git] / drivers / of / base.c

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b306fef..80c9dec 100644 (file)
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -137,6 +137,31 @@ struct device_node *of_get_parent(const struct device_node *node)
 }
 EXPORT_SYMBOL(of_get_parent);
 
+/**
+ *     of_get_next_parent - Iterate to a node's parent
+ *     @node:  Node to get parent of
+ *
+ *     This is like of_get_parent() except that it drops the
+ *     refcount on the passed node, making it suitable for iterating
+ *     through a node's parents.
+ *
+ *     Returns a node pointer with refcount incremented, use
+ *     of_node_put() on it when done.
+ */
+struct device_node *of_get_next_parent(struct device_node *node)
+{
+       struct device_node *parent;
+
+       if (!node)
+               return NULL;
+
+       read_lock(&devtree_lock);
+       parent = of_node_get(node->parent);
+       of_node_put(node);
+       read_unlock(&devtree_lock);
+       return parent;
+}
+
 /**
  *     of_get_next_child - Iterate a node childs
  *     @node:  parent node