[PATCH 3/9] fwnode: define the property_get_names() operation

[Bartosz Golaszewski]

Define a new fwnode operation allowing to retrieve the list of all
properties of given firmware node in a dynamically allocated array of
strings.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
---
 include/linux/fwnode.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h
index a9dcaf7e70765637a0c33af2ae0ac541e15752ad..2d7e0b9245d445d473c7317bd27058abe5750b40 100644
--- a/include/linux/fwnode.h
+++ b/include/linux/fwnode.h
@@ -125,6 +125,13 @@ struct fwnode_reference_args {
  *			     success, a negative error code otherwise.
  * @property_read_string_array: Read an array of string properties. Return zero
  *				on success, a negative error code otherwise.
+ * @property_get_names: Retrieve the list of all properties of this firmware
+ *			node. On success: returns the number of properties and
+ *			sets *props to an array of NULL-terminated strings that
+ *			must be freed by the user with kfree_strarray(). If
+ *			there are no properties, 0 is returned and the props
+ *			pointer is not changed. Returns negative error number on
+ *			failure.
  * @get_name: Return the name of an fwnode.
  * @get_name_prefix: Get a prefix for a node (for printing purposes).
  * @get_parent: Return the parent of an fwnode.
@@ -162,6 +169,8 @@ struct fwnode_operations {
 	(*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
 				      const char *propname, const char **val,
 				      size_t nval);
+	int (*property_get_names)(const struct fwnode_handle *fwnode,
+				  char ***props);
 	const char *(*get_name)(const struct fwnode_handle *fwnode);
 	const char *(*get_name_prefix)(const struct fwnode_handle *fwnode);
 	struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);

-- 
2.47.3