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

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commit 43849785e1 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>
This commit is contained in:
Fabien Parent
2017-01-17 13:57:42 +01:00
committed by Greg Kroah-Hartman
parent 5b66186152
commit 71c4964955
1 changed files with 1 additions and 0 deletions
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arch/arm/boot/dts/da850-evm.dts
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@@ -99,6 +99,7 @@
#size-cells = <1>; #size-cells = <1>;
compatible = "m25p64"; compatible = "m25p64";
spi-max-frequency = <30000000>; spi-max-frequency = <30000000>;
m25p,fast-read;
reg = <0>; reg = <0>;
partition@0 { partition@0 {
label = "U-Boot-SPL"; label = "U-Boot-SPL";