serial: stm32: add RTS support

Implement support of RTS in USART control register

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index a12d79c..2fca2d2 100644 (file)
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -518,7 +518,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
        port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
        if (cflag & CRTSCTS) {
                port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
-               cr3 |= USART_CR3_CTSE;
+               cr3 |= USART_CR3_CTSE | USART_CR3_RTSE;
        }
 
        usartdiv = DIV_ROUND_CLOSEST(port->uartclk, baud);