1 #include <linux/string.h>
2 #include <linux/kernel.h>
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/mod_devicetable.h>
7 #include <linux/slab.h>
10 #include <asm/of_device.h>
12 ssize_t
of_device_get_modalias(struct of_device
*ofdev
,
13 char *str
, ssize_t len
)
17 ssize_t tsize
, csize
, repend
;
20 csize
= snprintf(str
, len
, "of:N%sT%s",
21 ofdev
->node
->name
, ofdev
->node
->type
);
23 /* Get compatible property if any */
24 compat
= of_get_property(ofdev
->node
, "compatible", &cplen
);
28 /* Find true end (we tolerate multiple \0 at the end */
29 for (i
=(cplen
-1); i
>=0 && !compat
[i
]; i
--)
35 /* Check space (need cplen+1 chars including final \0) */
36 tsize
= csize
+ cplen
;
39 if (csize
>=len
) /* @ the limit, all is already filled */
42 if (tsize
>=len
) { /* limit compat list */
47 /* Copy and do char replacement */
48 memcpy(&str
[csize
+1], compat
, cplen
);
49 for (i
=csize
; i
<repend
; i
++) {
60 int of_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
62 struct of_device
*ofdev
;
64 int seen
= 0, cplen
, sl
;
69 ofdev
= to_of_device(dev
);
71 if (add_uevent_var(env
, "OF_NAME=%s", ofdev
->node
->name
))
74 if (add_uevent_var(env
, "OF_TYPE=%s", ofdev
->node
->type
))
77 /* Since the compatible field can contain pretty much anything
78 * it's not really legal to split it out with commas. We split it
79 * up using a number of environment variables instead. */
81 compat
= of_get_property(ofdev
->node
, "compatible", &cplen
);
82 while (compat
&& *compat
&& cplen
> 0) {
83 if (add_uevent_var(env
, "OF_COMPATIBLE_%d=%s", seen
, compat
))
86 sl
= strlen (compat
) + 1;
92 if (add_uevent_var(env
, "OF_COMPATIBLE_N=%d", seen
))
95 /* modalias is trickier, we add it in 2 steps */
96 if (add_uevent_var(env
, "MODALIAS="))
98 sl
= of_device_get_modalias(ofdev
, &env
->buf
[env
->buflen
-1],
99 sizeof(env
->buf
) - env
->buflen
);
100 if (sl
>= (sizeof(env
->buf
) - env
->buflen
))
106 EXPORT_SYMBOL(of_device_uevent
);
107 EXPORT_SYMBOL(of_device_get_modalias
);
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