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@xxxxxxx>
---
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
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