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

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Enric Balletbo i Serra 2012-12-06 09:45:04 +01:00 committed by Greg Kroah-Hartman
parent a6b68a69fa
commit fdbc7353e4
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/omap-serial.c
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@ -776,6 +776,8 @@ 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.