do {
dbg(udevice->udev, "looking at '%s'\n", dev_parent->devpath);
value = sysfs_attr_get_value(udevice->udev, dev_parent->devpath, attr);
do {
dbg(udevice->udev, "looking at '%s'\n", dev_parent->devpath);
value = sysfs_attr_get_value(udevice->udev, dev_parent->devpath, attr);