There aren't many, but some of_get_next_child() callers do need an unabridged
view of the device tree so we provide a wrapper that can be used by them.
Signed-off-by: Hollis Blanchard <hollis_blanch...@mentor.com>
Signed-off-by: Deepak Saxena <deepak_sax...@mentor.com>
---
drivers/of/base.c | 26 ++++++++++++++++++++++++++
include/linux/of.h | 2 ++
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 81b2601..7bc1398 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -315,6 +315,32 @@ struct device_node *of_get_next_parent(struct device_node
*node)
}
/**
+ * _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.
+ *
+ * Unlike most other node accessors, ignores status properties.
+ */
+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_device_is_available(next) && of_node_get(next))
+ break;
+ of_node_put(prev);
+ read_unlock(&devtree_lock);
+ return next;
+}
+EXPORT_SYMBOL(_of_get_next_child);
+
+/**
* of_get_next_child - Iterate a node childs
* @node: parent node
* @prev: previous child of the parent node, or NULL to get first
diff --git a/include/linux/of.h b/include/linux/of.h
index cad7cf0..1fea01d 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -175,6 +175,8 @@ extern struct device_node *of_find_node_by_path(const char
*path);
extern struct device_node *of_find_node_by_phandle(phandle handle);
extern struct device_node *of_get_parent(const struct device_node *node);
extern struct device_node *of_get_next_parent(struct device_node *node);
+extern struct device_node *_of_get_next_child(const struct device_node *node,
+ struct device_node *prev);
extern struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev);
#define for_each_child_of_node(parent, child) \
--
1.6.3.3
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