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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-11-09 11:07:08 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-13 08:38:18 +0200 |
commit | cc44a37924447f5e0cd2bf6900280a43ccbd7e50 (patch) | |
tree | 7cb706fb5f9ed2083464d7ccce6bf3036ee0e351 /include | |
parent | d96f74f26feb832d25b77483df7f4f68ee78c61e (diff) | |
download | barebox-cc44a37924447f5e0cd2bf6900280a43ccbd7e50.tar.gz barebox-cc44a37924447f5e0cd2bf6900280a43ccbd7e50.tar.xz |
of: import of_graph functions
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
-rw-r--r-- | include/of_graph.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/of_graph.h b/include/of_graph.h new file mode 100644 index 0000000000..fa037dbf75 --- /dev/null +++ b/include/of_graph.h @@ -0,0 +1,49 @@ +/* + * OF graph binding parsing helpers + * + * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. + * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> + * + * Copyright (C) 2012 Renesas Electronics Corp. + * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + */ +#ifndef __LINUX_OF_GRAPH_H +#define __LINUX_OF_GRAPH_H + +/** + * struct of_endpoint - the OF graph endpoint data structure + * @port: identifier (value of reg property) of a port this endpoint belongs to + * @id: identifier (value of reg property) of this endpoint + * @local_node: pointer to device_node of this endpoint + */ +struct of_endpoint { + unsigned int port; + unsigned int id; + const struct device_node *local_node; +}; + +/** + * for_each_endpoint_of_node - iterate over every endpoint in a device node + * @parent: parent device node containing ports and endpoints + * @child: loop variable pointing to the current endpoint node + * + * When breaking out of the loop, of_node_put(child) has to be called manually. + */ +#define for_each_endpoint_of_node(parent, child) \ + for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \ + child = of_graph_get_next_endpoint(parent, child)) + +int of_graph_parse_endpoint(const struct device_node *node, + struct of_endpoint *endpoint); +struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); +struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, + struct device_node *previous); +struct device_node *of_graph_get_remote_port_parent( + const struct device_node *node); +struct device_node *of_graph_get_remote_port(const struct device_node *node); + +#endif /* __LINUX_OF_GRAPH_H */ |