Symbol: ATMEL_US_NACK
drivers/tty/serial/atmel_serial.c
1388
if (pending & (ATMEL_US_NACK | ATMEL_US_ITERATION))
drivers/tty/serial/atmel_serial.c
426
atmel_port->tx_done_mask = ATMEL_US_TXEMPTY | ATMEL_US_NACK | ATMEL_US_ITERATION;