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11#ifndef __LINUX_OF_GRAPH_H
12#define __LINUX_OF_GRAPH_H
13
14#include <linux/types.h>
15#include <linux/errno.h>
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22
23struct of_endpoint {
24 unsigned int port;
25 unsigned int id;
26 const struct device_node *local_node;
27};
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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
40#ifdef CONFIG_OF
41int of_graph_parse_endpoint(const struct device_node *node,
42 struct of_endpoint *endpoint);
43int of_graph_get_endpoint_count(const struct device_node *np);
44struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id);
45struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
46 struct device_node *previous);
47struct device_node *of_graph_get_endpoint_by_regs(
48 const struct device_node *parent, int port_reg, int reg);
49struct device_node *of_graph_get_remote_endpoint(
50 const struct device_node *node);
51struct device_node *of_graph_get_port_parent(struct device_node *node);
52struct device_node *of_graph_get_remote_port_parent(
53 const struct device_node *node);
54struct device_node *of_graph_get_remote_port(const struct device_node *node);
55struct device_node *of_graph_get_remote_node(const struct device_node *node,
56 u32 port, u32 endpoint);
57#else
58
59static inline int of_graph_parse_endpoint(const struct device_node *node,
60 struct of_endpoint *endpoint)
61{
62 return -ENOSYS;
63}
64
65static inline int of_graph_get_endpoint_count(const struct device_node *np)
66{
67 return 0;
68}
69
70static inline struct device_node *of_graph_get_port_by_id(
71 struct device_node *node, u32 id)
72{
73 return NULL;
74}
75
76static 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
83static inline struct device_node *of_graph_get_endpoint_by_regs(
84 const struct device_node *parent, int port_reg, int reg)
85{
86 return NULL;
87}
88
89static inline struct device_node *of_graph_get_remote_endpoint(
90 const struct device_node *node)
91{
92 return NULL;
93}
94
95static inline struct device_node *of_graph_get_port_parent(
96 struct device_node *node)
97{
98 return NULL;
99}
100
101static inline struct device_node *of_graph_get_remote_port_parent(
102 const struct device_node *node)
103{
104 return NULL;
105}
106
107static inline struct device_node *of_graph_get_remote_port(
108 const struct device_node *node)
109{
110 return NULL;
111}
112static 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}
118
119#endif
120
121#endif
122