From: Noam Camus <no...@ezchip.com>

Add support for UPIO_MEM32BE in addition to UPIO_MEM32.

For big endian we use 2 new accessors similar to little endian,
called dw8250_serial_out32be() and dw8250_serial_in32be().

Signed-off-by: Noam Camus <no...@ezchip.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
(cherry picked from commit 4625090187768bc776d69dfaa6a1f79b1125debe)
Signed-off-by: Tan Jui Nee <jui.nee....@intel.com>
---
 drivers/tty/serial/8250/8250_dw.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_dw.c 
b/drivers/tty/serial/8250/8250_dw.c
index ffe5e0c..92c4a9b 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -182,6 +182,24 @@ static unsigned int dw8250_serial_in32(struct uart_port 
*p, int offset)
        return dw8250_modify_msr(p, offset, value);
 }
 
+static void dw8250_serial_out32be(struct uart_port *p, int offset, int value)
+{
+       struct dw8250_data *d = p->private_data;
+
+       iowrite32be(value, p->membase + (offset << p->regshift));
+
+       if (offset == UART_LCR && !d->uart_16550_compatible)
+               dw8250_check_lcr(p, value);
+}
+
+static unsigned int dw8250_serial_in32be(struct uart_port *p, int offset)
+{
+       unsigned int value = ioread32be(p->membase + (offset << p->regshift));
+
+       return dw8250_modify_msr(p, offset, value);
+}
+
+
 static int dw8250_handle_irq(struct uart_port *p)
 {
        struct dw8250_data *d = p->private_data;
@@ -276,6 +294,11 @@ static void dw8250_quirks(struct uart_port *p, struct 
dw8250_data *data)
                        data->skip_autocfg = true;
                }
 #endif
+               if (of_device_is_big_endian(p->dev->of_node)) {
+                       p->iotype = UPIO_MEM32BE;
+                       p->serial_in = dw8250_serial_in32be;
+                       p->serial_out = dw8250_serial_out32be;
+               }
        } else if (has_acpi_companion(p->dev)) {
                p->iotype = UPIO_MEM32;
                p->regshift = 2;
-- 
1.9.1

-- 
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