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@xxxxxxxxx>
---
drivers/tty/serial/pxa.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 21b7d8b..21406dc 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.iotype == UPIO_MEM32BE)
+ return ioread32be(up->port.membase + offset);
+ else
+ return readl(up->port.membase + offset);
}
static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
{
offset <<= 2;
- writel(value, up->port.membase + offset);
+ if (up->port.iotype == UPIO_MEM32BE)
+ iowrite32be(value, up->port.membase + offset);
+ else
+ writel(value, up->port.membase + offset);
}
static void serial_pxa_enable_ms(struct uart_port *port)
@@ -833,6 +839,7 @@ static int serial_pxa_probe_dt(struct platform_device *pdev,
{
struct device_node *np = pdev->dev.of_node;
int ret;
+ u32 val;
if (!np)
return 1;
@@ -843,6 +850,13 @@ static int serial_pxa_probe_dt(struct platform_device *pdev,
return ret;
}
sport->port.line = ret;
+
+ if (of_property_read_u32(np, "fifo-size", &val) == 0)
+ sport->port.fifosize = val;
+
+ sport->port.iotype =
+ of_device_is_big_endian(np) ? UPIO_MEM32BE : UPIO_MEM32;
+
return 0;
}
--
2.1.1
