[PATCH 2/8] serial: 8250_dw: allow enable rs485 at boot time

[Giulio Benetti]

If "linux,rs485-enabled-at-boot-time" is specified need to setup 485
in probe function.

Call uart_get_rs485_mode() to get rs485 configuration, then call
rs485_config() callback directly to setup port as rs485.

Signed-off-by: Giulio Benetti <giulio.bene...@micronovasrl.com>
---
 drivers/tty/serial/8250/8250_dw.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c 
b/drivers/tty/serial/8250/8250_dw.c
index 45366e6e5411..0f8b4da03d4e 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -582,8 +582,11 @@ static int dw8250_probe(struct platform_device *pdev)
        if (data->uart_16550_compatible)
                p->handle_irq = NULL;
 
-       if (!data->skip_autocfg)
+       if (!data->skip_autocfg) {
                dw8250_setup_port(p);
+               uart_get_rs485_mode(dev, &p->rs485);
+               dw8250_rs485_config(p, &p->rs485);
+       }
 
        /* If we have a valid fifosize, try hooking up DMA */
        if (p->fifosize) {
-- 
2.17.0