From: Enric Balletbo i Serra <eballetbo@gmail.com>
To: Alan Cox <alan@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-serial@vger.kernel.org, linux-omap@vger.kernel.org
Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Subject: [PATCH] serial: omap: add the functionality of a 9-bit UART with userspaces CMSPAR
Date: Thu, 6 Dec 2012 09:45:04 +0100 [thread overview]
Message-ID: <1354783504-7826-1-git-send-email-eballetbo@gmail.com> (raw)
From: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Some systems require the additional communication functionality of a
9-bit UART. For that we could use the "stick" (mark/space) parity
bit supported on omap serial device. When is set, if PARODD is set the
parity bit is always 1; if PARODD is not set, then the parity bit is
always 0.
Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
---
drivers/tty/serial/omap-serial.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 6d3d26a..197fb71 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -756,6 +756,8 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
cval |= UART_LCR_PARITY;
if (!(termios->c_cflag & PARODD))
cval |= UART_LCR_EPAR;
+ if (termios->c_cflag & CMSPAR)
+ cval |= UART_LCR_SPAR;
/*
* Ask the core to calculate the divisor for us.
--
1.7.10.4
reply other threads:[~2012-12-06 8:45 UTC|newest]
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