diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index f988672..12a0851 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -294,9 +294,27 @@ static ssize_t devspec_show(struct device *dev,
return sprintf(buf, "%s\n", of_node ? of_node->full_name : "none");
}
+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);
+}
+
static struct device_attribute vio_dev_attrs[] = {
__ATTR_RO(name),
__ATTR_RO(devspec),
+ __ATTR_RO(modalias),
__ATTR_NULL
};