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From: Marcin Wojtas <mw@semihalf.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mtd@lists.infradead.org, linux-spi@vger.kernel.org
Cc: robh+dt@kernel.org, mark.rutland@arm.com, will.deacon@arm.com,
	cyrille.pitchen@wedev4u.fr, marek.vasut@gmail.com,
	broonie@kernel.org, thomas.petazzoni@free-electrons.com,
	gregory.clement@free-electrons.com, nadavh@marvell.com,
	neta@marvell.com, omrii@marvell.com, hannah@marvell.com,
	mw@semihalf.com, jaz@semihalf.com, tn@semihalf.com
Subject: [PATCH 2/2] arm64: dts: marvell: Force 3byte addressing mode for SPI on A7040 DB
Date: Mon, 28 Aug 2017 23:14:14 +0200	[thread overview]
Message-ID: <1503954854-30963-3-git-send-email-mw@semihalf.com> (raw)
In-Reply-To: <1503954854-30963-1-git-send-email-mw@semihalf.com>

Armada 7040 DB boards can be shipped with various models of
boot SPI flash devices. An issue can emerge, when their size
exceeds 16MB - in such case the kernel driver will switch automatically
to 4B addressing mode. Later, in case of soft reset, the Boot ROM
will fail to fetch the firmware during the board initialization.

In order to prevent such behavior, this patch forces 3B addressing
mode used on affected boards by adding newly introduced
'spi-3byte-addressing' property to the SPI flash nodes.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 arch/arm64/boot/dts/marvell/armada-7040-db.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-7040-db.dts b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
index 92c761c..d0bd296 100644
--- a/arch/arm64/boot/dts/marvell/armada-7040-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
@@ -116,6 +116,7 @@
 		compatible = "jedec,spi-nor";
 		reg = <0x0>;
 		spi-max-frequency = <20000000>;
+		spi-3byte-addressing;
 
 		partitions {
 			compatible = "fixed-partitions";
-- 
1.8.3.1

WARNING: multiple messages have this Message-ID (diff)
From: mw@semihalf.com (Marcin Wojtas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] arm64: dts: marvell: Force 3byte addressing mode for SPI on A7040 DB
Date: Mon, 28 Aug 2017 23:14:14 +0200	[thread overview]
Message-ID: <1503954854-30963-3-git-send-email-mw@semihalf.com> (raw)
In-Reply-To: <1503954854-30963-1-git-send-email-mw@semihalf.com>

Armada 7040 DB boards can be shipped with various models of
boot SPI flash devices. An issue can emerge, when their size
exceeds 16MB - in such case the kernel driver will switch automatically
to 4B addressing mode. Later, in case of soft reset, the Boot ROM
will fail to fetch the firmware during the board initialization.

In order to prevent such behavior, this patch forces 3B addressing
mode used on affected boards by adding newly introduced
'spi-3byte-addressing' property to the SPI flash nodes.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 arch/arm64/boot/dts/marvell/armada-7040-db.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-7040-db.dts b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
index 92c761c..d0bd296 100644
--- a/arch/arm64/boot/dts/marvell/armada-7040-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
@@ -116,6 +116,7 @@
 		compatible = "jedec,spi-nor";
 		reg = <0x0>;
 		spi-max-frequency = <20000000>;
+		spi-3byte-addressing;
 
 		partitions {
 			compatible = "fixed-partitions";
-- 
1.8.3.1

  parent reply	other threads:[~2017-08-28 21:10 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-28 21:14 [PATCH 0/2] SPI NOR - force 3byte addressing mode Marcin Wojtas
2017-08-28 21:14 ` Marcin Wojtas
2017-08-28 21:14 ` Marcin Wojtas
2017-08-28 21:14 ` [PATCH 1/2] mtd: spi-nor: add an option to force 3byte adressing mode Marcin Wojtas
2017-08-28 21:14   ` Marcin Wojtas
2017-08-28 21:18   ` Geert Uytterhoeven
2017-08-28 21:18     ` Geert Uytterhoeven
2017-08-28 21:18     ` Geert Uytterhoeven
2017-08-28 21:54     ` Marcin Wojtas
2017-08-28 21:54       ` Marcin Wojtas
2017-08-28 21:54       ` Marcin Wojtas
2017-08-28 21:54       ` Marcin Wojtas
2017-08-28 23:24   ` Marek Vasut
2017-08-28 23:24     ` Marek Vasut
2017-08-29  7:40     ` Marcin Wojtas
2017-08-29  7:40       ` Marcin Wojtas
2017-09-04 16:26   ` Pavel Machek
2017-09-04 16:26     ` Pavel Machek
2017-08-28 21:14 ` Marcin Wojtas [this message]
2017-08-28 21:14   ` [PATCH 2/2] arm64: dts: marvell: Force 3byte addressing mode for SPI on A7040 DB Marcin Wojtas

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