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- From 5f1a35c3f5c17cc6229873248a56784fcd03db1c Mon Sep 17 00:00:00 2001
- From: Fugang Duan <[email protected]>
- 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 <[email protected]>
- ---
- 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
- @@ -2135,11 +2135,12 @@ 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.
- @@ -2176,7 +2177,9 @@ 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)
- @@ -2246,6 +2249,7 @@ 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);
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