[PATCH] ARM: davinci: da850-evm: fix read access to SPI flash

[Kevin Hilman]

Fabien Parent <fparent at baylibre.com> writes:

> 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.
>
> Signed-off-by: Fabien Parent <fparent at baylibre.com>

Tested on da850-evm on top of v4.10-rc3.  This gets the DT boot
functionatliy in line with the legacy (board-file) boot.

Tested-by: Kevin Hilman <khilman at baylibre.com>

Kevin