RX8025_REG_SEC
err = rx8025_read_regs(client, RX8025_REG_SEC, 7, date);
dt->tm_sec = bcd2bin(date[RX8025_REG_SEC] & 0x7f);
date[RX8025_REG_SEC] = bin2bcd(dt->tm_sec);
ret = rx8025_write_regs(client, RX8025_REG_SEC, 7, date);