struct device_attribute *dattr = to_dev_attr(attr);
struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
enum lm3533_attribute_type type = lattr->type;
struct device_attribute *dattr = to_dev_attr(attr);
struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
enum lm3533_attribute_type type = lattr->type;