diff options
Diffstat (limited to 'drivers/of/base.c')
| -rw-r--r-- | drivers/of/base.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 82bb78680ff..6b6dfcc5652 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -134,3 +134,27 @@ struct device_node *of_get_parent(const struct device_node *node) return np; } EXPORT_SYMBOL(of_get_parent); + +/** + * of_get_next_child - Iterate a node childs + * @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. + */ +struct device_node *of_get_next_child(const struct device_node *node, + struct device_node *prev) +{ + struct device_node *next; + + read_lock(&devtree_lock); + next = prev ? prev->sibling : node->child; + for (; next; next = next->sibling) + if (of_node_get(next)) + break; + of_node_put(prev); + read_unlock(&devtree_lock); + return next; +} +EXPORT_SYMBOL(of_get_next_child); |