diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/819-uart-0011-serial-fsl_lpuart-enable-two-stop-bits.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/819-uart-0011-serial-fsl_lpuart-enable-two-stop-bits.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/819-uart-0011-serial-fsl_lpuart-enable-two-stop-bits.patch b/target/linux/layerscape/patches-5.4/819-uart-0011-serial-fsl_lpuart-enable-two-stop-bits.patch new file mode 100644 index 0000000000..107909567d --- /dev/null +++ b/target/linux/layerscape/patches-5.4/819-uart-0011-serial-fsl_lpuart-enable-two-stop-bits.patch @@ -0,0 +1,49 @@ +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 +@@ -2111,11 +2111,12 @@ 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. +@@ -2152,7 +2153,9 @@ 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) +@@ -2222,6 +2225,7 @@ 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); |