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-rw-r--r--drivers/of/base.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 2ce58be314af..785e9cc1b207 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -615,6 +615,27 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
EXPORT_SYMBOL_GPL(of_modalias_node);
/**
+ * of_find_node_by_phandle - Find a node given a phandle
+ * @handle: phandle of the node to find
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done.
+ */
+struct device_node *of_find_node_by_phandle(phandle handle)
+{
+ struct device_node *np;
+
+ read_lock(&devtree_lock);
+ for (np = allnodes; np; np = np->allnext)
+ if (np->phandle == handle)
+ break;
+ of_node_get(np);
+ read_unlock(&devtree_lock);
+ return np;
+}
+EXPORT_SYMBOL(of_find_node_by_phandle);
+
+/**
* of_parse_phandle - Resolve a phandle property to a device_node pointer
* @np: Pointer to device node holding phandle property
* @phandle_name: Name of property holding a phandle value