| From 5f1a35c3f5c17cc6229873248a56784fcd03db1c Mon Sep 17 00:00:00 2001 |
| From: Fugang Duan <fugang.duan@nxp.com> |
| Date: Fri, 27 Sep 2019 15:18:41 +0800 |
| Subject: [PATCH] serial: fsl_lpuart: enable two stop bits |
| |
| Add two stop bits support. |
| User can run the command to enable two stop bits |
| for test: stty cstopb -F /dev/ttyLPx |
| |
| Signed-off-by: Fugang Duan <fugang.duan@nxp.com> |
| --- |
| drivers/tty/serial/fsl_lpuart.c | 8 ++++++-- |
| 1 file changed, 6 insertions(+), 2 deletions(-) |
| |
| --- a/drivers/tty/serial/fsl_lpuart.c |
| +++ b/drivers/tty/serial/fsl_lpuart.c |
| @@ -2154,11 +2154,12 @@ lpuart32_set_termios(struct uart_port *p |
| { |
| struct lpuart_port *sport = container_of(port, struct lpuart_port, port); |
| unsigned long flags; |
| - unsigned long ctrl, old_ctrl, modem; |
| + unsigned long ctrl, old_ctrl, bd, modem; |
| unsigned int baud; |
| unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; |
| |
| ctrl = old_ctrl = lpuart32_read(&sport->port, UARTCTRL); |
| + bd = lpuart32_read(&sport->port, UARTBAUD); |
| modem = lpuart32_read(&sport->port, UARTMODIR); |
| /* |
| * only support CS8 and CS7, and for CS7 must enable PE. |
| @@ -2195,7 +2196,9 @@ lpuart32_set_termios(struct uart_port *p |
| } |
| |
| if (termios->c_cflag & CSTOPB) |
| - termios->c_cflag &= ~CSTOPB; |
| + bd |= UARTBAUD_SBNS; |
| + else |
| + bd &= ~UARTBAUD_SBNS; |
| |
| /* parity must be enabled when CS7 to match 8-bits format */ |
| if ((termios->c_cflag & CSIZE) == CS7) |
| @@ -2272,6 +2275,7 @@ lpuart32_set_termios(struct uart_port *p |
| lpuart32_write(&sport->port, old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE), |
| UARTCTRL); |
| |
| + lpuart32_write(&sport->port, bd, UARTBAUD); |
| lpuart32_serial_setbrg(sport, baud); |
| lpuart32_write(&sport->port, modem, UARTMODIR); |
| lpuart32_write(&sport->port, ctrl, UARTCTRL); |