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af6074fc | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
fd9fdb78 PZ |
2 | /* |
3 | * OF graph binding parsing helpers | |
4 | * | |
5 | * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. | |
6 | * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> | |
7 | * | |
8 | * Copyright (C) 2012 Renesas Electronics Corp. | |
9 | * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
fd9fdb78 PZ |
10 | */ |
11 | #ifndef __LINUX_OF_GRAPH_H | |
12 | #define __LINUX_OF_GRAPH_H | |
13 | ||
01218bf1 | 14 | #include <linux/types.h> |
011d6f5c | 15 | #include <linux/errno.h> |
01218bf1 | 16 | |
f2a575f6 PZ |
17 | /** |
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 | |
22 | */ | |
23 | struct of_endpoint { | |
24 | unsigned int port; | |
25 | unsigned int id; | |
26 | const struct device_node *local_node; | |
27 | }; | |
28 | ||
ee890596 PZ |
29 | /** |
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 | |
33 | * | |
34 | * When breaking out of the loop, of_node_put(child) has to be called manually. | |
35 | */ | |
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)) | |
39 | ||
fd9fdb78 | 40 | #ifdef CONFIG_OF |
f2a575f6 PZ |
41 | int of_graph_parse_endpoint(const struct device_node *node, |
42 | struct of_endpoint *endpoint); | |
ac1e6958 | 43 | int of_graph_get_endpoint_count(const struct device_node *np); |
bfe446e3 | 44 | struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); |
fd9fdb78 PZ |
45 | struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, |
46 | struct device_node *previous); | |
8ccd0d0c HH |
47 | struct device_node *of_graph_get_endpoint_by_regs( |
48 | const struct device_node *parent, int port_reg, int reg); | |
4c9c3d59 KM |
49 | struct device_node *of_graph_get_remote_endpoint( |
50 | const struct device_node *node); | |
0ef472a9 | 51 | struct device_node *of_graph_get_port_parent(struct device_node *node); |
fd9fdb78 PZ |
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); | |
b85ad494 RH |
55 | struct device_node *of_graph_get_remote_node(const struct device_node *node, |
56 | u32 port, u32 endpoint); | |
fd9fdb78 PZ |
57 | #else |
58 | ||
f2a575f6 | 59 | static inline int of_graph_parse_endpoint(const struct device_node *node, |
00fd9619 | 60 | struct of_endpoint *endpoint) |
f2a575f6 PZ |
61 | { |
62 | return -ENOSYS; | |
63 | } | |
64 | ||
ac1e6958 KM |
65 | static inline int of_graph_get_endpoint_count(const struct device_node *np) |
66 | { | |
67 | return 0; | |
68 | } | |
69 | ||
bfe446e3 PZ |
70 | static inline struct device_node *of_graph_get_port_by_id( |
71 | struct device_node *node, u32 id) | |
72 | { | |
73 | return NULL; | |
74 | } | |
75 | ||
fd9fdb78 PZ |
76 | static inline struct device_node *of_graph_get_next_endpoint( |
77 | const struct device_node *parent, | |
78 | struct device_node *previous) | |
79 | { | |
80 | return NULL; | |
81 | } | |
82 | ||
ce0bdb84 | 83 | static inline struct device_node *of_graph_get_endpoint_by_regs( |
8ccd0d0c HH |
84 | const struct device_node *parent, int port_reg, int reg) |
85 | { | |
86 | return NULL; | |
87 | } | |
88 | ||
4c9c3d59 KM |
89 | static inline struct device_node *of_graph_get_remote_endpoint( |
90 | const struct device_node *node) | |
91 | { | |
92 | return NULL; | |
93 | } | |
94 | ||
0ef472a9 KM |
95 | static inline struct device_node *of_graph_get_port_parent( |
96 | struct device_node *node) | |
97 | { | |
98 | return NULL; | |
99 | } | |
100 | ||
fd9fdb78 PZ |
101 | static inline struct device_node *of_graph_get_remote_port_parent( |
102 | const struct device_node *node) | |
103 | { | |
104 | return NULL; | |
105 | } | |
106 | ||
107 | static inline struct device_node *of_graph_get_remote_port( | |
108 | const struct device_node *node) | |
109 | { | |
110 | return NULL; | |
111 | } | |
b85ad494 RH |
112 | static inline struct device_node *of_graph_get_remote_node( |
113 | const struct device_node *node, | |
114 | u32 port, u32 endpoint) | |
115 | { | |
116 | return NULL; | |
117 | } | |
fd9fdb78 PZ |
118 | |
119 | #endif /* CONFIG_OF */ | |
120 | ||
121 | #endif /* __LINUX_OF_GRAPH_H */ |