RP2_TX_FIFO_COUNT  281 drivers/tty/serial/rp2.c 	tx_fifo_bytes = readw(up->base + RP2_TX_FIFO_COUNT);
RP2_TX_FIFO_COUNT  434 drivers/tty/serial/rp2.c 	u16 max_tx = FIFO_SIZE - readw(up->base + RP2_TX_FIFO_COUNT);