+
+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;
+}