With a few tweaks, the PXA serial driver can handle other 16550A clones.
Add a fifo-size DT property to override the FIFO depth (BCM7xxx uses 32),
and {native,big}-endian properties similar to regmap to support SoCs that
have BE or "automagic endian" registers.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
---
 drivers/tty/serial/pxa.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 21b7d8b..78ed7ee 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c

@@ -60,13 +60,19 @@ struct uart_pxa_port {
 static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
 {
 	offset <<= 2;
-	return readl(up->port.membase + offset);
+	if (!up->port.big_endian)
+		return readl(up->port.membase + offset);
+	else
+		return ioread32be(up->port.membase + offset);