[PATCH v3 0/8] Add the Quadspi driver for vf610-twr
From: broonie@kernel.org (Mark Brown)
Date: 2013-09-18 16:00:24
Also in:
linux-devicetree
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:
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[ potential "LUT" optimization, implementation details ]
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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. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20130918/41f92132/attachment.sig>