From 5dfbd1d734ef5415bc47b034df7433ba21e40e7b Mon Sep 17 00:00:00 2001
From: Claudio Scordino <claudio@evidence.eu.com>
Date: Thu, 13 Jan 2011 15:45:39 -0800
Subject: atmel_serial: fix RTS high after initialization in RS485 mode
When working in RS485 mode, the atmel_serial driver keeps RTS high after
the initialization of the serial port. It goes low only after the first
character has been sent.
[akpm@linux-foundation.org: simplify code]
Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Arkadiusz Bubala <arkadiusz.bubala@gmail.com>
Tested-by: Arkadiusz Bubala <arkadiusz.bubala@gmail.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/serial/atmel_serial.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 3892666b5fb..2a1d52fb493 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -1732,6 +1732,11 @@ static int __devinit atmel_serial_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
platform_set_drvdata(pdev, port);
+ if (port->rs485.flags & SER_RS485_ENABLED) {
+ UART_PUT_MR(&port->uart, ATMEL_US_USMODE_NORMAL);
+ UART_PUT_CR(&port->uart, ATMEL_US_RTSEN);
+ }
+
return 0;
err_add_port:
--
cgit v1.2.3-70-g09d2