[3.13.y.z extended stable] Patch "ARC: [nsimosci] Allow "headless" models to boot" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Fri Oct 31 20:53:37 UTC 2014

This is a note to let you know that I have just added a patch titled

    ARC: [nsimosci] Allow "headless" models to boot

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see



>From f2093392c48c27fdd8f18258ab76bb386141bba9 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta at synopsys.com>
Date: Fri, 20 Jun 2014 16:24:49 +0530
Subject: ARC: [nsimosci] Allow "headless" models to boot

commit 5c05483e2db91890faa9a7be0a831701a3f442d6 upstream.

There are certain test configuration of virtual platform which don't
have any real console device (uart/pgu). So add tty0 as a fallback console
device to allow system to boot and be accessible via telnet

Otherwise with ttyS0 as only console, but 8250 disabled in kernel build,
init chokes.

Reported-by: Anton Kolesov <akolesov at synopsys.com>
Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 arch/arc/boot/dts/nsimosci.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
index 4f31b2e..398064c 100644
--- a/arch/arc/boot/dts/nsimosci.dts
+++ b/arch/arc/boot/dts/nsimosci.dts
@@ -20,7 +20,7 @@
 		/* this is for console on PGU */
 		/* bootargs = "console=tty0 consoleblank=0"; */
 		/* this is for console on serial */
-		bootargs = "earlycon=uart8250,mmio32,0xc0000000,115200n8 console=ttyS0,115200n8 consoleblank=0 debug";
+		bootargs = "earlycon=uart8250,mmio32,0xc0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblank=0 debug";

 	aliases {

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