Incoming Linux code port makes use of the helper. Add it now instead of
having to open-code it later.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/of/base.c | 25 +++++++++++++++++++++++++
include/of.h | 8 ++++++++
2 files changed, 33 insertions(+)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 346d72e1e09e..5a0374a82c5c 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1712,6 +1712,31 @@ int of_get_available_child_count(const struct device_node *parent)
}
EXPORT_SYMBOL(of_get_available_child_count);
+/**
+ * of_get_compatible_child - Find compatible child node
+ * @parent: parent node
+ * @compatible: compatible string
+ *
+ * Lookup child node whose compatible property contains the given compatible
+ * string.
+ *
+ * Returns a node pointer with refcount incremented, use of_node_put() on it
+ * when done; or NULL if not found.
+ */
+struct device_node *of_get_compatible_child(const struct device_node *parent,
+ const char *compatible)
+{
+ struct device_node *child;
+
+ for_each_child_of_node(parent, child) {
+ if (of_device_is_compatible(child, compatible))
+ break;
+ }
+
+ return child;
+}
+EXPORT_SYMBOL(of_get_compatible_child);
+
/**
* of_get_child_by_name - Find the child node by name for a given parent
* @node: parent node
diff --git a/include/of.h b/include/of.h
index eea5abae459b..85d55f9b57dc 100644
--- a/include/of.h
+++ b/include/of.h
@@ -177,6 +177,8 @@ struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev);
extern int of_get_child_count(const struct device_node *parent);
extern int of_get_available_child_count(const struct device_node *parent);
+extern struct device_node *of_get_compatible_child(const struct device_node *parent,
+ const char *compatible);
extern struct device_node *of_get_child_by_name(const struct device_node *node,
const char *name);
extern char *of_get_reproducible_name(struct device_node *node);
@@ -380,6 +382,12 @@ static inline int of_get_available_child_count(const struct device_node *parent)
return -ENOSYS;
}
+static inline struct device_node *of_get_compatible_child(const struct device_node *parent,
+ const char *compatible)
+{
+ return NULL;
+}
+
static inline struct device_node *of_get_child_by_name(
const struct device_node *node, const char *name)
{
--
2.26.0.rc2
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