of: base: improve of_get_next_child() kernel-doc

Add two new facts to of_get_next_child() documentation:

   * of_get_next_child() returns NULL when there is not next child

   * of_get_next_child() decrements the refcount of prev

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 31ca3c8dae61..7183e825d658 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -663,8 +663,9 @@ static struct device_node *__of_get_next_child(const struct device_node *node,
  *      @node:  parent node
  *      @prev:  previous child of the parent node, or NULL to get first
  *
- *      Returns a node pointer with refcount incremented, use
- *      of_node_put() on it when done.
+ *      Returns a node pointer with refcount incremented, use of_node_put() on
+ *      it when done. Returns NULL when prev is the last child. Decrements the
+ *      refcount of prev.
  */
 struct device_node *of_get_next_child(const struct device_node *node,
         struct device_node *prev)