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serial: omap: add the functionality of a 9-bit UART with userspaces CMSPAR

Message ID 1354783504-7826-1-git-send-email-eballetbo@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Enric Balletbo Serra Dec. 6, 2012, 8:45 a.m. UTC 
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(+)
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Patch

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.