+static void mvebu_uart_set_termios(struct uart_port *port,
+				   struct ktermios *termios,
+				   struct ktermios *old)
+{
+	unsigned long flags;
+	unsigned int baud;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	port->read_status_mask = STAT_RX_RDY | STAT_OVR_ERR |
+		STAT_TX_RDY | STAT_TX_FIFO_FUL;
+
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= STAT_FRM_ERR | STAT_PAR_ERR;
+
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |=
+			STAT_FRM_ERR | STAT_PAR_ERR | STAT_OVR_ERR;
+
+	if ((termios->c_cflag & CREAD) == 0)
+		port->ignore_status_mask |= STAT_RX_RDY | STAT_BRK_ERR;

If you don't support parity or charactive size then you should be forcing
those bits in the tty->termios so that the caller sees what settings they
get. tty_termios_copy_hw is close to what you need except that you can
support IGNPAR.

You also want to provide the actual baud rate chosen (see how 8250.c does
it using tty_termios_encode_baud_rate().

+static struct uart_driver mvebu_uart_driver = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "serial",
+	.dev_name		= "ttyS",
+	.major			= TTY_MAJOR,
+	.minor			= 64,

NAK

TTY_MAJOR 64+ is the 8250 driver and ttyS is the 8250 driver name. You
should be using a dynamic major (0) for all new drivers and you need to
pick a different and unused ttyXXX format name.

Alan