target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch

   1 From 9a061cea4477f26a1dfcc0a08dc20575016e91df Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
   3 Date: Thu, 24 Mar 2016 14:24:20 +0100
   4 Subject: [PATCH 1/3] serial: imx: fix polarity of RI
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 When in DTE mode, the bit USR2_RIIN is active low. So invert the logic
  10 accordingly.
  11
  12 Fixes: 90ebc4838666 ("serial: imx: repair and complete handshaking")
  13 Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
  14 Signed-off-by: Petr Štetiar <ynezz@true.cz>
  15 ---
  16  drivers/tty/serial/imx.c | 6 +++---
  17  1 file changed, 3 insertions(+), 3 deletions(-)
  18
  19 --- a/drivers/tty/serial/imx.c
  20 +++ b/drivers/tty/serial/imx.c
  21 @@ -817,9 +817,9 @@ static unsigned int imx_get_mctrl(struct
  22         if (!(usr1 & USR2_DCDIN))
  23                 tmp |= TIOCM_CAR;
  24
  25 -       /* in DCE mode RIIN is always 0 */
  26 -       if (readl(sport->port.membase + USR2) & USR2_RIIN)
  27 -               tmp |= TIOCM_RI;
  28 +       if (sport->dte_mode)
  29 +               if (!(readl(sport->port.membase + USR2) & USR2_RIIN))
  30 +                       tmp |= TIOCM_RI;
  31
  32         return tmp;
  33  }