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 diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
  20 index 231e7d5..bfc4555 100644
  21 --- a/drivers/tty/serial/imx.c
  22 +++ b/drivers/tty/serial/imx.c
  23 @@ -797,9 +797,9 @@ static unsigned int imx_get_hwmctrl(struct imx_port *sport)
  24         if (!(usr1 & USR2_DCDIN))
  25                 tmp |= TIOCM_CAR;
  26
  27 -       /* in DCE mode RIIN is always 0 */
  28 -       if (readl(sport->port.membase + USR2) & USR2_RIIN)
  29 -               tmp |= TIOCM_RI;
  30 +       if (sport->dte_mode)
  31 +               if (!(readl(sport->port.membase + USR2) & USR2_RIIN))
  32 +                       tmp |= TIOCM_RI;
  33
  34         return tmp;
  35  }
  36 --
  37 1.9.1
  38