diff options
| author |   Fugang Duan <fugang.duan@nxp.com> | 2021-08-23 16:17:33 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-26 14:49:14 +0200 |
| commit | 48422152a8f1c290f74d8fb16ec6c77a1263834c (patch) | |
| tree | 4f08894779aba08bab5779099d8a00a854401433 /drivers/tty | |
| parent | tty: serial: fsl_lpuart: fix the wrong mapbase value (diff) | |
| download | linux-dev-48422152a8f1c290f74d8fb16ec6c77a1263834c.tar.xz linux-dev-48422152a8f1c290f74d8fb16ec6c77a1263834c.zip | |
tty: serial: fsl_lpuart: enable two stop bits for lpuart32
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>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20210823081733.31941-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 117e011aff5f..55097e068908 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2049,11 +2049,12 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, { 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. @@ -2097,7 +2098,9 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, } 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) @@ -2167,6 +2170,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, 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); |