[PATCH] tty: serial: fsl_lpuart: enable two stop bits for lpuart32
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LANDED
From: Sherry Sun <hidden>
Date: 2021-08-23 08:19:01
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lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Status: Landed in mainline as 48422152a8f1 on 2021-08-26.
From: Fugang Duan <redacted> 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 <redacted> Signed-off-by: Sherry Sun <redacted> --- drivers/tty/serial/fsl_lpuart.c | 8 ++++++-- 1 file 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);
--
2.17.1