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Subject[PATCH 6/8] serial: 8250: update rs485 flags with polarity settings
Date
Report the only mode we can support with the 16C850.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
---
drivers/tty/serial/8250.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 28b3608..8cf6d76 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -2750,6 +2750,9 @@ static int serial8250_ioctl_port(struct uart_port *port,
serial_outp(up, UART_LCR, lcr);
spin_unlock_irqrestore(&up->port.lock, flags);

+ /* only mode supported by the 16C850 */
+ rs485ctrl.flags &= ~SER_RS485_RTS_ON_SEND;
+ rs485ctrl.flags |= SER_RS485_RTS_AFTER_SEND;
up->rs485_flags = rs485ctrl.flags;

return 0;
--
1.7.7.1


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