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fd9fdb78 PZ |
1 | /* |
2 | * OF graph binding parsing helpers | |
3 | * | |
4 | * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. | |
5 | * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> | |
6 | * | |
7 | * Copyright (C) 2012 Renesas Electronics Corp. | |
8 | * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | #ifndef __LINUX_OF_GRAPH_H | |
15 | #define __LINUX_OF_GRAPH_H | |
16 | ||
01218bf1 MB |
17 | #include <linux/types.h> |
18 | ||
f2a575f6 PZ |
19 | /** |
20 | * struct of_endpoint - the OF graph endpoint data structure | |
21 | * @port: identifier (value of reg property) of a port this endpoint belongs to | |
22 | * @id: identifier (value of reg property) of this endpoint | |
23 | * @local_node: pointer to device_node of this endpoint | |
24 | */ | |
25 | struct of_endpoint { | |
26 | unsigned int port; | |
27 | unsigned int id; | |
28 | const struct device_node *local_node; | |
29 | }; | |
30 | ||
ee890596 PZ |
31 | /** |
32 | * for_each_endpoint_of_node - iterate over every endpoint in a device node | |
33 | * @parent: parent device node containing ports and endpoints | |
34 | * @child: loop variable pointing to the current endpoint node | |
35 | * | |
36 | * When breaking out of the loop, of_node_put(child) has to be called manually. | |
37 | */ | |
38 | #define for_each_endpoint_of_node(parent, child) \ | |
39 | for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \ | |
40 | child = of_graph_get_next_endpoint(parent, child)) | |
41 | ||
fd9fdb78 | 42 | #ifdef CONFIG_OF |
f2a575f6 PZ |
43 | int of_graph_parse_endpoint(const struct device_node *node, |
44 | struct of_endpoint *endpoint); | |
bfe446e3 | 45 | struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); |
fd9fdb78 PZ |
46 | struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, |
47 | struct device_node *previous); | |
8ccd0d0c HH |
48 | struct device_node *of_graph_get_endpoint_by_regs( |
49 | const struct device_node *parent, int port_reg, int reg); | |
fd9fdb78 PZ |
50 | struct device_node *of_graph_get_remote_port_parent( |
51 | const struct device_node *node); | |
52 | struct device_node *of_graph_get_remote_port(const struct device_node *node); | |
53 | #else | |
54 | ||
f2a575f6 | 55 | static inline int of_graph_parse_endpoint(const struct device_node *node, |
00fd9619 | 56 | struct of_endpoint *endpoint) |
f2a575f6 PZ |
57 | { |
58 | return -ENOSYS; | |
59 | } | |
60 | ||
bfe446e3 PZ |
61 | static inline struct device_node *of_graph_get_port_by_id( |
62 | struct device_node *node, u32 id) | |
63 | { | |
64 | return NULL; | |
65 | } | |
66 | ||
fd9fdb78 PZ |
67 | static inline struct device_node *of_graph_get_next_endpoint( |
68 | const struct device_node *parent, | |
69 | struct device_node *previous) | |
70 | { | |
71 | return NULL; | |
72 | } | |
73 | ||
ce0bdb84 | 74 | static inline struct device_node *of_graph_get_endpoint_by_regs( |
8ccd0d0c HH |
75 | const struct device_node *parent, int port_reg, int reg) |
76 | { | |
77 | return NULL; | |
78 | } | |
79 | ||
fd9fdb78 PZ |
80 | static inline struct device_node *of_graph_get_remote_port_parent( |
81 | const struct device_node *node) | |
82 | { | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | static inline struct device_node *of_graph_get_remote_port( | |
87 | const struct device_node *node) | |
88 | { | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | #endif /* CONFIG_OF */ | |
93 | ||
94 | #endif /* __LINUX_OF_GRAPH_H */ |