M_DUART_IN_PIN0_VAL
mctrl = (!(status & M_DUART_IN_PIN0_VAL) ? TIOCM_CTS : 0) |
if (delta & (M_DUART_IN_PIN0_VAL << S_DUART_IN_PIN_CHNG))
uart_handle_cts_change(uport, !(delta & M_DUART_IN_PIN0_VAL));
if (delta & ((M_DUART_IN_PIN2_VAL | M_DUART_IN_PIN0_VAL) <<