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

[David Woodhouse]

On Thu, 2013-09-12 at 12:48 +0100, Mark Brown wrote:
> On Thu, Sep 12, 2013 at 12:17:45PM +0100, David Woodhouse wrote:
> 
> > Right. The issue here is that the LUT is currently *pre-populated*, with
> > an incestuously-"known" set of commands that the slave is expected to
> > support.
> 
> So, to repeat my earlier question can someone tell me what a LUT is?

I only know what's in the patch that you have also received, but it
seems to be a table of commands. To send a given command to the flash,
you write the actual command to the some slot in the LUT, then 'trigger'
it by writing its index to another register.

I think this whole thing is about the fact that they are *prepopulating*
the LUT with a set of 'known' commands, and have incestuous knowledge
about what commands will be used, rather than being a truly generic SPI
driver and being able to cope with *any* commands that might be sent to
the slave(s), dynamically setting up to the LUT as required.

-- 
dwmw2

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