[PATCH 3/3] spi: i.MX: optimize transfers for ECSPI v2.3

[Sascha Hauer]

On Mon, Aug 31, 2015 at 05:12:46PM +0200, Sascha Hauer wrote:
> Instead of writing one word to the txfifo and then wait until
> one is received in the rxfifo we can write until the txfifos
> are not full and read as long the rxfifos contain data. This
> makes transfers for the m25p80 driver around 7 times faster
> here.

I had to revert this one for now as it doesn't work on the Efika MX
Smartbook on which the MC13892 is connected via SPI. I'll rework this
once I'm back from ELCE.

Sascha


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