From: Janusz Uzycki <j.uzycki@elproma.com.pl>
Date: Fri, 10 Oct 2014 11:13:28 +0000 (+0200)
Subject: serial: mxs-auart: add sysrq support
X-Git-Tag: firefly_0821_release~176^2~2678^2~156
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=914d3b17e90d9f75f764ffbdbdae354056b9fb79;p=firefly-linux-kernel-4.4.55.git

serial: mxs-auart: add sysrq support

When using mxs-auart based console, sometime we need the sysrq function
to help debugging kernel. The sysrq code is basically there,
this patch just simply enable it.

Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 10c29334fe2f..0296c1c3b70e 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -14,6 +14,10 @@
  * http://www.gnu.org/copyleft/gpl.html
  */
 
+#if defined(CONFIG_SERIAL_MXS_AUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/init.h>