RX8581_REG_SC
tm->tm_sec = bcd2bin(date[RX8581_REG_SC] & 0x7F);
buf[RX8581_REG_SC] = bin2bcd(tm->tm_sec);
err = regmap_bulk_write(regmap, RX8581_REG_SC, buf, sizeof(buf));
err = regmap_bulk_read(regmap, RX8581_REG_SC, date,