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-rw-r--r--drivers/of/base.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index ddf224d456b2..e6627b2320f1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -9,7 +9,8 @@
*
* Adapted for sparc and sparc64 by David S. Miller davem@davemloft.net
*
- * Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell.
+ * Reconsolidated from arch/x/kernel/prom.c by Stephen Rothwell and
+ * Grant Likely.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -82,6 +83,29 @@ struct property *of_find_property(const struct device_node *np,
}
EXPORT_SYMBOL(of_find_property);
+/**
+ * of_find_all_nodes - Get next node in global list
+ * @prev: Previous node or NULL to start iteration
+ * of_node_put() will be called on it
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done.
+ */
+struct device_node *of_find_all_nodes(struct device_node *prev)
+{
+ struct device_node *np;
+
+ read_lock(&devtree_lock);
+ np = prev ? prev->allnext : allnodes;
+ for (; np != NULL; np = np->allnext)
+ if (of_node_get(np))
+ break;
+ of_node_put(prev);
+ read_unlock(&devtree_lock);
+ return np;
+}
+EXPORT_SYMBOL(of_find_all_nodes);
+
/*
* Find a property with a given name for a given node
* and return the value.