1 #include <linux/string.h>
2 #include <linux/kernel.h>
4 #include <linux/of_device.h>
5 #include <linux/init.h>
6 #include <linux/module.h>
7 #include <linux/mod_devicetable.h>
8 #include <linux/slab.h>
10 #include <asm/errno.h>
13 * of_match_device - Tell if an of_device structure has a matching
15 * @ids: array of of device match structures to search in
16 * @dev: the of device structure to match against
18 * Used by a driver to check whether an of_device present in the
19 * system is in its list of supported devices.
21 const struct of_device_id
*of_match_device(const struct of_device_id
*matches
,
22 const struct of_device
*dev
)
26 return of_match_node(matches
, dev
->node
);
28 EXPORT_SYMBOL(of_match_device
);
30 struct of_device
*of_dev_get(struct of_device
*dev
)
36 tmp
= get_device(&dev
->dev
);
38 return to_of_device(tmp
);
42 EXPORT_SYMBOL(of_dev_get
);
44 void of_dev_put(struct of_device
*dev
)
47 put_device(&dev
->dev
);
49 EXPORT_SYMBOL(of_dev_put
);
51 static ssize_t
devspec_show(struct device
*dev
,
52 struct device_attribute
*attr
, char *buf
)
54 struct of_device
*ofdev
;
56 ofdev
= to_of_device(dev
);
57 return sprintf(buf
, "%s\n", ofdev
->node
->full_name
);
60 static ssize_t
modalias_show(struct device
*dev
,
61 struct device_attribute
*attr
, char *buf
)
63 struct of_device
*ofdev
= to_of_device(dev
);
66 len
= of_device_get_modalias(ofdev
, buf
, PAGE_SIZE
- 2);
72 struct device_attribute of_platform_device_attrs
[] = {
79 * of_release_dev - free an of device structure when all users of it are finished.
80 * @dev: device that's been disconnected
82 * Will be called only by the device core when all users of this of device are
85 void of_release_dev(struct device
*dev
)
87 struct of_device
*ofdev
;
89 ofdev
= to_of_device(dev
);
90 of_node_put(ofdev
->node
);
93 EXPORT_SYMBOL(of_release_dev
);
95 int of_device_register(struct of_device
*ofdev
)
97 BUG_ON(ofdev
->node
== NULL
);
98 return device_register(&ofdev
->dev
);
100 EXPORT_SYMBOL(of_device_register
);
102 void of_device_unregister(struct of_device
*ofdev
)
104 device_unregister(&ofdev
->dev
);
106 EXPORT_SYMBOL(of_device_unregister
);
108 ssize_t
of_device_get_modalias(struct of_device
*ofdev
,
109 char *str
, ssize_t len
)
113 ssize_t tsize
, csize
, repend
;
116 csize
= snprintf(str
, len
, "of:N%sT%s",
117 ofdev
->node
->name
, ofdev
->node
->type
);
119 /* Get compatible property if any */
120 compat
= of_get_property(ofdev
->node
, "compatible", &cplen
);
124 /* Find true end (we tolerate multiple \0 at the end */
125 for (i
= (cplen
- 1); i
>= 0 && !compat
[i
]; i
--)
131 /* Check space (need cplen+1 chars including final \0) */
132 tsize
= csize
+ cplen
;
135 if (csize
>= len
) /* @ the limit, all is already filled */
138 if (tsize
>= len
) { /* limit compat list */
139 cplen
= len
- csize
- 1;
143 /* Copy and do char replacement */
144 memcpy(&str
[csize
+ 1], compat
, cplen
);
145 for (i
= csize
; i
< repend
; i
++) {