This function retrieves a named child node of a given parent node.
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
drivers/of/base.c | 18 ++++++++++++++++++
include/linux/of.h | 2 ++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3ff22e3..7eea9e3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -388,6 +388,24 @@ struct device_node *of_find_node_by_name(struct device_node *from,
}
EXPORT_SYMBOL(of_find_node_by_name);
+struct device_node *of_find_child_node_by_name(
+ const struct device_node *parent, const char *name)
+{
+ struct device_node *child;
+
+ read_lock(&devtree_lock);
+
+ for_each_child_of_node(parent, child) {
+ if (!strcmp(child->name, name))
+ break;
+ }
+
+ read_unlock(&devtree_lock);
+
+ return child;
+}
+EXPORT_SYMBOL(of_find_child_node_by_name);
+
/**
* of_find_node_by_type - Find a node by its "device_type" property
* @from: The node to start searching from, or NULL to start searching
diff --git a/include/linux/of.h b/include/linux/of.h
index 9180dc5..032c71b 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -161,6 +161,8 @@ extern struct device_node *of_find_node_by_name(struct device_node *from,
#define for_each_node_by_name(dn, name) \
for (dn = of_find_node_by_name(NULL, name); dn; \
dn = of_find_node_by_name(dn, name))
+extern struct device_node *of_find_child_node_by_name(
+ const struct device_node *node, const char *name);
extern struct device_node *of_find_node_by_type(struct device_node *from,
const char *type);
#define for_each_node_by_type(dn, type) \
--
1.7.0.4
--
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