ISL12022_REG_YR
buf[ISL12022_REG_YR],
tm->tm_year = bcd2bin(buf[ISL12022_REG_YR]) + 100;
buf[ISL12022_REG_YR] = bin2bcd(tm->tm_year % 100);
ret = regmap_read(regmap, ISL12022_REG_YR, &yr);