The patch titled
atmel_serial: fix RTS high after initialization in RS485 mode
has been added to the -mm tree. Its filename is
atmel_serial-fix-rts-high-after-initialization-in-rs485-mode.patch
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------------------------------------------------------
Subject: atmel_serial: fix RTS high after initialization in RS485 mode
From: Claudio Scordino <claudio@xxxxxxxxxxxxxxx>
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.
Signed-off-by: Claudio Scordino <claudio@xxxxxxxxxxxxxxx>
Signed-off-by: Arkadiusz Bubala <arkadiusz.bubala@xxxxxxxxx>
Tested-by: Arkadiusz Bubala <arkadiusz.bubala@xxxxxxxxx>
Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/serial/atmel_serial.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff -puN drivers/serial/atmel_serial.c~atmel_serial-fix-rts-high-after-initialization-in-rs485-mode drivers/serial/atmel_serial.c
--- a/drivers/serial/atmel_serial.c~atmel_serial-fix-rts-high-after-initialization-in-rs485-mode
+++ a/drivers/serial/atmel_serial.c
@@ -1732,6 +1732,15 @@ static int __devinit atmel_serial_probe(
device_init_wakeup(&pdev->dev, 1);
platform_set_drvdata(pdev, port);
+ if (port->rs485.flags & SER_RS485_ENABLED) {
+ unsigned int control = 0;
+ unsigned int mode = 0;
+ control |= ATMEL_US_RTSEN;
+ mode |= ATMEL_US_USMODE_NORMAL;
+ UART_PUT_MR(&port->uart, mode);
+ UART_PUT_CR(&port->uart, control);
+ }
+
return 0;
err_add_port:
_
Patches currently in -mm which might be from claudio@xxxxxxxxxxxxxxx are
atmel_serial-fix-rts-high-after-initialization-in-rs485-mode.patch
atmel_serial-fix-rts-high-after-initialization-in-rs485-mode-fix.patch
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