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

From Kevin Hilman <khilman@baylibre.com>
Newsgroups linux.kernel
Subject Re: [PATCH] ARM: davinci: da850-evm: fix read access to SPI flash
Date 2017-01-18 01:30 +0100
Message-ID <t0Miu-5tz-9@gated-at.bofh.it> (permalink)
References <t0BwJ-7cW-11@gated-at.bofh.it>
Organization BayLibre

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Fabien Parent <fparent@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@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@baylibre.com>

Kevin

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Thread

[PATCH] ARM: davinci: da850-evm: fix read access to SPI flash Fabien Parent <fparent@baylibre.com> - 2017-01-17 14:00 +0100
  Re: [PATCH] ARM: davinci: da850-evm: fix read access to SPI flash Kevin Hilman <khilman@baylibre.com> - 2017-01-18 01:30 +0100
    Re: [PATCH] ARM: davinci: da850-evm: fix read access to SPI flash Sekhar Nori <nsekhar@ti.com> - 2017-01-18 11:10 +0100

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