Symbol: UART_FCR_TRIGGER_4
drivers/tty/mxser.c
607
info->FCR |= UART_FCR_TRIGGER_4;
samples/vfio-mdev/mtty.c
460
case UART_FCR_TRIGGER_4:
sound/drivers/serial-u16550.c
367
| UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */