serial: fsl_lpuart: clear parity enable bit when disable parity

[ Upstream commit 397bd9211fe014b347ca8f95a8f4e1017bac1aeb ]

Current driver only enable parity enable bit and never clear it
when user set the termios. The fix clear the parity enable bit when
PARENB flag is not set in termios->c_cflag.

Cc: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Duan <fugang.duan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 92b7a5b..839e65d 100644 (file)
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1284,6 +1284,8 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
                        else
                                cr1 &= ~UARTCR1_PT;
                }
+       } else {
+               cr1 &= ~UARTCR1_PE;
        }
 
        /* ask the core to calculate the divisor */
@@ -1419,6 +1421,8 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
                        else
                                ctrl &= ~UARTCTRL_PT;
                }
+       } else {
+               ctrl &= ~UARTCTRL_PE;
        }
 
        /* ask the core to calculate the divisor */