1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// SPDX-License-Identifier: GPL-2.0
/**
* Device connections
*
* Copyright (C) 2018 Intel Corporation
* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
*/
#include <linux/device.h>
#include <linux/property.h>
static void *
fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
void *data, devcon_match_fn_t match)
{
struct fwnode_handle *node;
struct fwnode_handle *ep;
void *ret;
fwnode_graph_for_each_endpoint(fwnode, ep) {
node = fwnode_graph_get_remote_port_parent(ep);
if (!fwnode_device_is_available(node))
continue;
ret = match(node, con_id, data);
fwnode_handle_put(node);
if (ret) {
fwnode_handle_put(ep);
return ret;
}
}
return NULL;
}
static void *
fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
void *data, devcon_match_fn_t match)
{
struct fwnode_handle *node;
void *ret;
int i;
for (i = 0; ; i++) {
node = fwnode_find_reference(fwnode, con_id, i);
if (IS_ERR(node))
break;
ret = match(node, NULL, data);
fwnode_handle_put(node);
if (ret)
return ret;
}
return NULL;
}
/**
* fwnode_connection_find_match - Find connection from a device node
* @fwnode: Device node with the connection
* @con_id: Identifier for the connection
* @data: Data for the match function
* @match: Function to check and convert the connection description
*
* Find a connection with unique identifier @con_id between @fwnode and another
* device node. @match will be used to convert the connection description to
* data the caller is expecting to be returned.
*/
void *fwnode_connection_find_match(struct fwnode_handle *fwnode,
const char *con_id, void *data,
devcon_match_fn_t match)
{
void *ret;
if (!fwnode || !match)
return NULL;
ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
if (ret)
return ret;
return fwnode_devcon_match(fwnode, con_id, data, match);
}
EXPORT_SYMBOL_GPL(fwnode_connection_find_match);
/**
* device_connection_find_match - Find physical connection to a device
* @dev: Device with the connection
* @con_id: Identifier for the connection
* @data: Data for the match function
* @match: Function to check and convert the connection description
*
* Find a connection with unique identifier @con_id between @dev and another
* device. @match will be used to convert the connection description to data the
* caller is expecting to be returned.
*/
void *device_connection_find_match(struct device *dev, const char *con_id,
void *data, devcon_match_fn_t match)
{
return fwnode_connection_find_match(dev_fwnode(dev), con_id, data, match);
}
EXPORT_SYMBOL_GPL(device_connection_find_match);
|
