[PATCH/RFC 4/8] serial: pxa: Add fifo-size and {big,native}-endian properties
From: Kevin Cernekee <cernekee@gmail.com>
Date: 2014-11-12 08:46:29
Also in:
linux-mips, linux-serial
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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@gmail.com>
---
drivers/tty/serial/pxa.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 21b7d8b..78ed7ee 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.big_endian) + return readl(up->port.membase + offset); + else + return ioread32be(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.big_endian) + writel(value, up->port.membase + offset); + else + iowrite32be(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 +850,11 @@ 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.big_endian = of_device_is_big_endian(np); + return 0; }
--
2.1.1