linux-kernel - [PATCH 3.12 074/146] ARM: mvebu: fix NOR bus-width in Armada XP OpenBlocks AX3 Device Tree

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Date:	Mon,  9 Jun 2014 10:50:09 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 074/146] ARM: mvebu: fix NOR bus-width in Armada XP OpenBlocks AX3 Device Tree

From: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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@...e-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@...e-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
Signed-off-by: Jason Cooper <jason@...edaemon.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 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 5695afcc04bf..d6cce8aa8c68 100644
--- a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
+++ b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
@@ -37,7 +37,7 @@
 			/* 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>;
-- 
1.9.3

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