REG_IER
ier = uart_getreg(bas, REG_IER);
uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);
uart_setreg(bas, REG_IER, ns8250->ier);
ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;
uart_setreg(bas, REG_IER, ns8250->ier);
uart_setreg(bas, REG_IER, ns8250->ier);
ier = uart_getreg(bas, REG_IER);
uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);
uart_setreg(bas, REG_IER, ns8250->ier);
ier = uart_getreg(bas, REG_IER) & 0xe0;
uart_setreg(bas, REG_IER, ier);
ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;
uart_setreg(bas, REG_IER, ns8250->ier);
ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;
uart_setreg(bas, REG_IER, ier);
uart_setreg(bas, REG_IER, ns8250->ier);
ier = uart_getreg(bas, REG_IER) & 0xe0;
uart_setreg(bas, REG_IER, ier);
case REG_IER:
case REG_IER: