device property: Add fwnode_graph_get_port_parent
Provide a helper to obtain the parent device fwnode without first
parsing the remote-endpoint as per fwnode_graph_get_remote_port_parent.
Signed-off-by: Kieran Bingham <[email protected]>
Signed-off-by: Sakari Ailus <[email protected]>
Reviewed-by: Mika Westerberg <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
diff --git a/drivers/base/property.c b/drivers/base/property.c
index ac3590b..692007e 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1171,6 +1171,26 @@ fwnode_graph_get_next_endpoint(struct fwnode_handle *fwnode,
EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
/**
+ * fwnode_graph_get_port_parent - Return the device fwnode of a port endpoint
+ * @endpoint: Endpoint firmware node of the port
+ *
+ * Return: the firmware node of the device the @endpoint belongs to.
+ */
+struct fwnode_handle *
+fwnode_graph_get_port_parent(struct fwnode_handle *endpoint)
+{
+ struct fwnode_handle *port, *parent;
+
+ port = fwnode_get_parent(endpoint);
+ parent = fwnode_call_ptr_op(port, graph_get_port_parent);
+
+ fwnode_handle_put(port);
+
+ return parent;
+}
+EXPORT_SYMBOL_GPL(fwnode_graph_get_port_parent);
+
+/**
* fwnode_graph_get_remote_port_parent - Return fwnode of a remote device
* @fwnode: Endpoint firmware node pointing to the remote endpoint
*
@@ -1179,12 +1199,12 @@ EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
struct fwnode_handle *
fwnode_graph_get_remote_port_parent(struct fwnode_handle *fwnode)
{
- struct fwnode_handle *port, *parent;
+ struct fwnode_handle *endpoint, *parent;
- port = fwnode_graph_get_remote_port(fwnode);
- parent = fwnode_call_ptr_op(port, graph_get_port_parent);
+ endpoint = fwnode_graph_get_remote_endpoint(fwnode);
+ parent = fwnode_graph_get_port_parent(endpoint);
- fwnode_handle_put(port);
+ fwnode_handle_put(endpoint);
return parent;
}
diff --git a/include/linux/property.h b/include/linux/property.h
index 0597a74..7e77039 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -275,6 +275,8 @@ void *device_get_mac_address(struct device *dev, char *addr, int alen);
struct fwnode_handle *fwnode_graph_get_next_endpoint(
struct fwnode_handle *fwnode, struct fwnode_handle *prev);
+struct fwnode_handle *
+fwnode_graph_get_port_parent(struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port_parent(
struct fwnode_handle *fwnode);
struct fwnode_handle *fwnode_graph_get_remote_port(
