M41T80_REG_SEC
tm->tm_sec = bcd2bin(buf[M41T80_REG_SEC] & 0x7f);
buf[M41T80_REG_SEC] = bin2bcd(tm.tm_sec);
err = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, M41T80_SEC_ST);
err = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, flags & ~M41T80_SEC_ST);
rc = i2c_smbus_read_byte_data(client, M41T80_REG_SEC);
rc = i2c_smbus_write_byte_data(client, M41T80_REG_SEC,