UART_FCR_TRIGGER_1
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
info->FCR |= UART_FCR_TRIGGER_1;
up->fcr |= UART_FCR_TRIGGER_1;
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
value = UART_FCR_TRIGGER_1 | UART_FCR_ENABLE_FIFO; /* TL: 1 */
case UART_FCR_TRIGGER_1: