AT91_TWI_NACK
if (irqstatus & (AT91_TWI_TXCOMP | AT91_TWI_NACK)) {
at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_NACK);
AT91_TWI_NACK |
at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_NACK);
AT91_TWI_TXCOMP | AT91_TWI_NACK |
if (dev->transfer_status & AT91_TWI_NACK) {
(AT91_TWI_TXCOMP | AT91_TWI_RXRDY | AT91_TWI_TXRDY | AT91_TWI_NACK \