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50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
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From 5f1a35c3f5c17cc6229873248a56784fcd03db1c Mon Sep 17 00:00:00 2001
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From: Fugang Duan <fugang.duan@nxp.com>
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Date: Fri, 27 Sep 2019 15:18:41 +0800
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Subject: [PATCH] serial: fsl_lpuart: enable two stop bits
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Add two stop bits support.
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User can run the command to enable two stop bits
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for test: stty cstopb -F /dev/ttyLPx
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Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
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---
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drivers/tty/serial/fsl_lpuart.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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--- a/drivers/tty/serial/fsl_lpuart.c
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+++ b/drivers/tty/serial/fsl_lpuart.c
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@@ -2111,11 +2111,12 @@ lpuart32_set_termios(struct uart_port *p
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{
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struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
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unsigned long flags;
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- unsigned long ctrl, old_ctrl, modem;
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+ unsigned long ctrl, old_ctrl, bd, modem;
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unsigned int baud;
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unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
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ctrl = old_ctrl = lpuart32_read(&sport->port, UARTCTRL);
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+ bd = lpuart32_read(&sport->port, UARTBAUD);
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modem = lpuart32_read(&sport->port, UARTMODIR);
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/*
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* only support CS8 and CS7, and for CS7 must enable PE.
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@@ -2152,7 +2153,9 @@ lpuart32_set_termios(struct uart_port *p
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}
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if (termios->c_cflag & CSTOPB)
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- termios->c_cflag &= ~CSTOPB;
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+ bd |= UARTBAUD_SBNS;
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+ else
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+ bd &= ~UARTBAUD_SBNS;
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/* parity must be enabled when CS7 to match 8-bits format */
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if ((termios->c_cflag & CSIZE) == CS7)
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@@ -2222,6 +2225,7 @@ lpuart32_set_termios(struct uart_port *p
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lpuart32_write(&sport->port, old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE),
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UARTCTRL);
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+ lpuart32_write(&sport->port, bd, UARTBAUD);
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lpuart32_serial_setbrg(sport, baud);
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lpuart32_write(&sport->port, modem, UARTMODIR);
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lpuart32_write(&sport->port, ctrl, UARTCTRL);
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