From: Noam Camus <noamc@xxxxxxxxxx>
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 <noamc@xxxxxxxxxx>
---
drivers/tty/serial/8250/8250_dw.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
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;
--
1.7.1
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