Re: [PATCH RFC 5/7] serial: imx: set_termios(): preserve RTS state

imx_set_termios() cleared RTS on every call, now fixed.

Signed-off-by: Sergey Organov <redacted>
---
 drivers/tty/serial/imx.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 8ee910f..de23068 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c

@@ -1564,6 +1564,13 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios,
 
 	spin_lock_irqsave(&sport->port.lock, flags);
 
+	/*
+	 * Read current UCR2 and save it for future use, then clear all the bits
+	 * except those we will or may need to preserve.
+	 */
+	old_ucr2 = imx_uart_readl(sport, UCR2);
+	ucr2 = old_ucr2 & (UCR2_TXEN | UCR2_RXEN | UCR2_ATEN | UCR2_CTSC);
+
 	ucr2 = UCR2_SRST | UCR2_IRTS;