Patch "ARM: dts: da850-evm: fix read access to SPI flash" has been added to the 4.4-stable tree

Patch "ARM: dts: da850-evm: fix read access to SPI flash" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARM: dts: da850-evm: fix read access to SPI flash

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm-dts-da850-evm-fix-read-access-to-spi-flash.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 43849785e1079f6606a31cb7fda92d1200849728 Mon Sep 17 00:00:00 2001
From: Fabien Parent <fparent@baylibre.com>
Date: Tue, 17 Jan 2017 13:57:42 +0100
Subject: ARM: dts: da850-evm: fix read access to SPI flash

From: Fabien Parent <fparent@baylibre.com>

commit 43849785e1079f6606a31cb7fda92d1200849728 upstream.

Read access to the SPI flash are broken on da850-evm, i.e. the data
read is not what is actually programmed on the flash.
According to the datasheet for the M25P64 part present on the da850-evm,
if the SPI frequency is higher than 20MHz then the READ command is not
usable anymore and only the FAST_READ command can be used to read data.

This commit specifies in the DTS that we should use FAST_READ command
instead of the READ command.

Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Fabien Parent <fparent@baylibre.com>
[nsekhar@ti.com: subject line adjustment]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Olof Johansson <olof@lixom.net>

---
 arch/arm/boot/dts/da850-evm.dts |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -85,6 +85,7 @@
 				#size-cells = <1>;
 				compatible = "m25p64";
 				spi-max-frequency = <30000000>;
+				m25p,fast-read;
 				reg = <0>;
 				partition@0 {
 					label = "U-Boot-SPL";


Patches currently in stable-queue which might be from fparent@baylibre.com are

queue-4.4/arm-dts-da850-evm-fix-read-access-to-spi-flash.patch