[3.11.y.z extended stable] Patch "ARM: mvebu: fix NOR bus-width in Armada XP GP Device Tree" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Fri May 30 09:28:23 UTC 2014

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

    ARM: mvebu: fix NOR bus-width in Armada XP GP Device Tree

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:


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

For more information about the 3.11.y.z tree, see



>From bec31d0138c2e9b6ea1469fbec2779a4f997e07a Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date: Mon, 14 Apr 2014 17:29:19 +0200
Subject: ARM: mvebu: fix NOR bus-width in Armada XP GP Device Tree

commit 1a88f809ccb5db1509a7514b187c00b3a995fc82 upstream.

The mvebu-devbus driver had a serious bug, which lead to a 8 bits bus
width declared in the Device Tree being considered as a 16 bits bus
width when configuring the hardware.

This bug in mvebu-devbus driver was compensated by a symetric mistake
in the Armada XP GP Device Tree: a 8 bits bus width was declared, even
though the hardware actually has a 16 bits bus width connection with
the NOR flash.

Now that we have fixed the mvebu-devbus driver to behave according to
its Device Tree binding, this commit fixes the problematic Device Tree
files as well.

This bug was introduced in commit
da8d1b38356853c37116f9afa29f15648d7fb159 ('ARM: mvebu: Add support for
NOR flash device on Armada XP-GP board') which was merged in v3.10.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Link: https://lkml.kernel.org/r/1397489361-5833-3-git-send-email-thomas.petazzoni@free-electrons.com
Fixes: da8d1b383568 ('ARM: mvebu: Add support for NOR flash device on Armada XP-GP board')
Acked-by: Ezequiel Garcia <ezequiel.garcia at free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement at free-electrons.com>
Signed-off-by: Jason Cooper <jason at lakedaemon.net>
[ luis: backported to 3.11: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 arch/arm/boot/dts/armada-xp-gp.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/armada-xp-gp.dts b/arch/arm/boot/dts/armada-xp-gp.dts
index c87b2de29c30..36b7df590d49 100644
--- a/arch/arm/boot/dts/armada-xp-gp.dts
+++ b/arch/arm/boot/dts/armada-xp-gp.dts
@@ -134,7 +134,7 @@
 				/* Device Bus parameters are required */

 				/* Read parameters */
-				devbus,bus-width    = <8>;
+				devbus,bus-width    = <16>;
 				devbus,turn-off-ps  = <60000>;
 				devbus,badr-skew-ps = <0>;
 				devbus,acc-first-ps = <124000>;

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