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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/of_graph.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * OF graph binding parsing helpers
5 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
6 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
8 * Copyright (C) 2012 Renesas Electronics Corp.
9 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
11 #ifndef __LINUX_OF_GRAPH_H
12 #define __LINUX_OF_GRAPH_H
14 #include <linux/types.h>
15 #include <linux/errno.h>
18 * struct of_endpoint - the OF graph endpoint data structure
19 * @port: identifier (value of reg property) of a port this endpoint belongs to
20 * @id: identifier (value of reg property) of this endpoint
21 * @local_node: pointer to device_node of this endpoint
26 const struct device_node
*local_node
;
30 * for_each_endpoint_of_node - iterate over every endpoint in a device node
31 * @parent: parent device node containing ports and endpoints
32 * @child: loop variable pointing to the current endpoint node
34 * When breaking out of the loop, of_node_put(child) has to be called manually.
36 #define for_each_endpoint_of_node(parent, child) \
37 for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \
38 child = of_graph_get_next_endpoint(parent, child))
41 int of_graph_parse_endpoint(const struct device_node
*node
,
42 struct of_endpoint
*endpoint
);
43 int of_graph_get_endpoint_count(const struct device_node
*np
);
44 struct device_node
*of_graph_get_port_by_id(struct device_node
*node
, u32 id
);
45 struct device_node
*of_graph_get_next_endpoint(const struct device_node
*parent
,
46 struct device_node
*previous
);
47 struct device_node
*of_graph_get_endpoint_by_regs(
48 const struct device_node
*parent
, int port_reg
, int reg
);
49 struct device_node
*of_graph_get_remote_endpoint(
50 const struct device_node
*node
);
51 struct device_node
*of_graph_get_port_parent(struct device_node
*node
);
52 struct device_node
*of_graph_get_remote_port_parent(
53 const struct device_node
*node
);
54 struct device_node
*of_graph_get_remote_port(const struct device_node
*node
);
55 struct device_node
*of_graph_get_remote_node(const struct device_node
*node
,
56 u32 port
, u32 endpoint
);
59 static inline int of_graph_parse_endpoint(const struct device_node
*node
,
60 struct of_endpoint
*endpoint
)
65 static inline int of_graph_get_endpoint_count(const struct device_node
*np
)
70 static inline struct device_node
*of_graph_get_port_by_id(
71 struct device_node
*node
, u32 id
)
76 static inline struct device_node
*of_graph_get_next_endpoint(
77 const struct device_node
*parent
,
78 struct device_node
*previous
)
83 static inline struct device_node
*of_graph_get_endpoint_by_regs(
84 const struct device_node
*parent
, int port_reg
, int reg
)
89 static inline struct device_node
*of_graph_get_remote_endpoint(
90 const struct device_node
*node
)
95 static inline struct device_node
*of_graph_get_port_parent(
96 struct device_node
*node
)
101 static inline struct device_node
*of_graph_get_remote_port_parent(
102 const struct device_node
*node
)
107 static inline struct device_node
*of_graph_get_remote_port(
108 const struct device_node
*node
)
112 static inline struct device_node
*of_graph_get_remote_node(
113 const struct device_node
*node
,
114 u32 port
, u32 endpoint
)
119 #endif /* CONFIG_OF */
121 #endif /* __LINUX_OF_GRAPH_H */