SERIAL_MODE_OUTPUT_OPEN
set_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode);
clear_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode);
if (!test_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode))
uart->filemode |= SERIAL_MODE_OUTPUT_OPEN;
uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN;