[PATCH 08/15] of_serial: support for UARTs on I/O ports

[Paul Burton <paul.burton@imgtec.com>]

If the address provided for the UART is of an I/O port rather than
a regular memory address, then set the port iotype appropriately and
write the address to iobase rather than mapbase.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---

 drivers/tty/serial/of_serial.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 137381e..ccff9ba 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -110,7 +110,12 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 
 	port->irq = irq_of_parse_and_map(np, 0);
 	port->iotype = UPIO_MEM;
-	if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
+
+	if (resource.flags & IORESOURCE_IO) {
+		port->iotype = UPIO_PORT;
+		port->iobase = port->mapbase;
+		port->mapbase = 0;
+	} else if (of_property_read_u32(np, "reg-io-width", &prop) == 0) {
 		switch (prop) {
 		case 1:
 			port->iotype = UPIO_MEM;
-- 
2.4.1