aboutsummaryrefslogtreecommitdiff
path: root/drivers/of/device.c
diff options
context:
space:
mode:
authorStephen Rothwell <sfr@canb.auug.org.au>2008-05-16 11:57:45 +1000
committerPaul Mackerras <paulus@samba.org>2008-05-16 23:22:28 +1000
commit09e67ca2c523544e6b38aa570a5f62a0cf20b87b (patch)
tree134d2ba98b567586dd34ffa7d7f8cfd8fe0de149 /drivers/of/device.c
parent7bc228b1ef71f395aeb89bdf81bf95556b08b374 (diff)
[POWERPC] Move of_device_get_modalias to drivers/of
Commit 140b932f8cb6cced10b96860651a198b1b89cbb9 ("Create modalias file in sysfs for of_platform bus") needs this to avoid breaking the sparc builds. Just move the code and add whitespace around some binary operators. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/of/device.c')
-rw-r--r--drivers/of/device.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 8fbfeee53c1..8a1d93a2bb8 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -104,3 +104,51 @@ void of_device_unregister(struct of_device *ofdev)
device_unregister(&ofdev->dev);
}
EXPORT_SYMBOL(of_device_unregister);
+
+ssize_t of_device_get_modalias(struct of_device *ofdev,
+ char *str, ssize_t len)
+{
+ const char *compat;
+ int cplen, i;
+ ssize_t tsize, csize, repend;
+
+ /* Name & Type */
+ csize = snprintf(str, len, "of:N%sT%s",
+ ofdev->node->name, ofdev->node->type);
+
+ /* Get compatible property if any */
+ compat = of_get_property(ofdev->node, "compatible", &cplen);
+ if (!compat)
+ return csize;
+
+ /* Find true end (we tolerate multiple \0 at the end */
+ for (i = (cplen - 1); i >= 0 && !compat[i]; i--)
+ cplen--;
+ if (!cplen)
+ return csize;
+ cplen++;
+
+ /* Check space (need cplen+1 chars including final \0) */
+ tsize = csize + cplen;
+ repend = tsize;
+
+ if (csize >= len) /* @ the limit, all is already filled */
+ return tsize;
+
+ if (tsize >= len) { /* limit compat list */
+ cplen = len - csize - 1;
+ repend = len;
+ }
+
+ /* Copy and do char replacement */
+ memcpy(&str[csize + 1], compat, cplen);
+ for (i = csize; i < repend; i++) {
+ char c = str[i];
+ if (c == '\0')
+ str[i] = 'C';
+ else if (c == ' ')
+ str[i] = '_';
+ }
+
+ return tsize;
+}