[PATCH v3 0/8] Add the Quadspi driver for vf610-twr

[Mark Brown]

On Wed, Sep 18, 2013 at 10:40:22AM -0500, David Woodhouse wrote:
> On Tue, 2013-09-17 at 20:13 +0100, Mark Brown wrote:

> > > [ potential "LUT" optimization, implementation details ]

> > AFAICT the big issue with the LUTs in this controller is that they are
> > expensive to reprogram so things are going to work better if there is a
> > small set of known operations that will happen repeatedly.  Otherwise
> > walking the transfer list at runtime isn't too hard.

> I think you can drop the word "known" there. With decent management of
> the LUT as a kind of LRU cache of recent operations, surely you'll
> quickly get into a situation where the operations you're actually
> *doing* on the flash are all already in the LUT and you're never
> actually *having* to reprogram it?

Yeah, assuming it's not too annoying to identify the repeated patterns
and doesn't blow up horribly just caching should work fine.
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