[PATCH V4 5/5] serial: of_serial: Support big-endian register accesses

[Kevin Cernekee]

If the device node has a "big-endian" property and 32-bit registers, tell
the serial driver to use UPIO_MEM32BE instead of UPIO_MEM32.

Signed-off-by: Kevin Cernekee <cernekee@xxxxxxxxx>
---
 drivers/tty/serial/of_serial.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index 33fb94f78967..e15c443b2a3c 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -115,7 +115,8 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 			port->iotype = UPIO_MEM;
 			break;
 		case 4:
-			port->iotype = UPIO_MEM32;
+			port->iotype = of_device_is_big_endian(np) ?
+				       UPIO_MEM32BE : UPIO_MEM32;
 			break;
 		default:
 			dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
-- 
2.2.2

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