+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ const struct vio_dev *vio_dev = to_vio_dev(dev);
+ struct device_node *dn;
+ const char *cp;
+
+ dn = dev->archdata.of_node;
+ if (!dn)
+ return -ENODEV;
+ cp = of_get_property(dn, "compatible", NULL);
+ if (!cp)
+ return -ENODEV;
+
+ return sprintf(buf, "vio:T%sS%s\n", vio_dev->type, cp);
+}
+