pmbus_dev_attr_init
pmbus_dev_attr_init(&a->dev_attr, name, mode, show, store);
pmbus_dev_attr_init(a, sensor->name,
pmbus_dev_attr_init(a, label->name, 0444, pmbus_show_label, NULL);
pmbus_dev_attr_init(®->dev_attr, attr->name, 0644,