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Diffstat (limited to 'target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch')
-rw-r--r--target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch38
1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch b/target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch
new file mode 100644
index 0000000..a065575
--- /dev/null
+++ b/target/linux/imx6/patches-4.4/111-serial-imx-fix-polarity-of-RI.patch
@@ -0,0 +1,38 @@
+From 9a061cea4477f26a1dfcc0a08dc20575016e91df Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
+Date: Thu, 24 Mar 2016 14:24:20 +0100
+Subject: [PATCH 1/3] serial: imx: fix polarity of RI
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+When in DTE mode, the bit USR2_RIIN is active low. So invert the logic
+accordingly.
+
+Fixes: 90ebc4838666 ("serial: imx: repair and complete handshaking")
+Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+---
+ drivers/tty/serial/imx.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
+index 231e7d5..bfc4555 100644
+--- a/drivers/tty/serial/imx.c
++++ b/drivers/tty/serial/imx.c
+@@ -797,9 +797,9 @@ static unsigned int imx_get_hwmctrl(struct imx_port *sport)
+ if (!(usr1 & USR2_DCDIN))
+ tmp |= TIOCM_CAR;
+
+- /* in DCE mode RIIN is always 0 */
+- if (readl(sport->port.membase + USR2) & USR2_RIIN)
+- tmp |= TIOCM_RI;
++ if (sport->dte_mode)
++ if (!(readl(sport->port.membase + USR2) & USR2_RIIN))
++ tmp |= TIOCM_RI;
+
+ return tmp;
+ }
+--
+1.9.1
+