[3.11.y.z extended stable] Patch "ARM: mvebu: fix NOR bus-width in Armada XP OpenBlocks AX3 Device Tree" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Fri May 30 09:28:26 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 OpenBlocks AX3 Device Tree

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

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

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
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 0e9c0be888496dad66ee5d4317203bdc09d4f09c Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date: Mon, 14 Apr 2014 17:29:21 +0200
Subject: ARM: mvebu: fix NOR bus-width in Armada XP OpenBlocks AX3 Device Tree

commit 6e20bae8a39c40d4e03698e4160bad2d2629062b 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 OpenBlocks AX3 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
a7d4f81821f7eec3175f8e23dd6949c71ab2da43 ('ARM: mvebu: Add support for
NOR flash device on Openblocks AX3 board') which was merged in v3.10.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Link: https://lkml.kernel.org/r/1397489361-5833-5-git-send-email-thomas.petazzoni@free-electrons.com
Fixes: a7d4f81821f7 ('ARM: mvebu: Add support for NOR flash device on Openblocks AX3 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-openblocks-ax3-4.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
index 8f510458ea86..3977770c7b5b 100644
--- a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
+++ b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
@@ -161,7 +161,7 @@
 				/* 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>;
--
1.9.1





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