Messages in this thread Patch in this message | | | From | José Miguel Gonçalves <> | Subject | [PATCH] serial: samsung: add support for manual RTS setting | Date | Wed, 11 Sep 2013 11:08:27 +0100 |
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The Samsung serial driver currently does not support setting the RTS pin with an ioctl(TIOCMSET) call. This patch adds this support.
Signed-off-by: José Miguel Gonçalves <jose.goncalves@inov.pt> --- drivers/tty/serial/samsung.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index f3dfa19..e5dd808 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -407,7 +407,14 @@ static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) { - /* todo - possibly remove AFC and do manual CTS */ + unsigned int umcon = rd_regl(port, S3C2410_UMCON); + + if (mctrl & TIOCM_RTS) + umcon |= S3C2410_UMCOM_RTS_LOW; + else + umcon &= ~S3C2410_UMCOM_RTS_LOW; + + wr_regl(port, S3C2410_UMCON, umcon); } static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) @@ -774,8 +781,6 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, if (termios->c_cflag & CSTOPB) ulcon |= S3C2410_LCON_STOPB; - umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0; - if (termios->c_cflag & PARENB) { if (termios->c_cflag & PARODD) ulcon |= S3C2410_LCON_PODD; @@ -792,6 +797,12 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, wr_regl(port, S3C2410_ULCON, ulcon); wr_regl(port, S3C2410_UBRDIV, quot); + + if (termios->c_cflag & CRTSCTS) + umcon = S3C2410_UMCOM_AFC; + else + umcon = rd_regb(port, S3C2410_UMCON) & ~S3C2410_UMCOM_AFC; + wr_regl(port, S3C2410_UMCON, umcon); if (ourport->info->has_divslot) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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