[PATCH 4/7] Documentation: mtd: add a DT property to set the latency code of Spansion memory

Marek Vasut marex at denx.de
Thu Jul 16 10:44:20 PDT 2015

On Thursday, July 16, 2015 at 05:27:51 PM, Cyrille Pitchen wrote:


> Both the SPI controller and the NOR flash memory need to agree on the
> number of dummy cycles to use for Fast Read commands. For Spansion
> memories, this number of dummy cycles is not given directly but through a
> so called "latency code".
> The latency code can be found into the memory datasheet and depends on the
> SPI clock frequency, the Fast Read op code and the Single/Dual Data Rate
> mode.

Shouldn't you be able to derive the latency code from the above information,
which you already know then ?

Best regards,
Marek Vasut

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