tree 7d1e2050d97f8e12b280d267fac9a49dbab7939e
parent d518563f197241cc72f5da4b2108b2df10f00372
author Nico Huber <nico.h@gmx.de> 1704561949 +0100
committer Nico Huber <nico.h@gmx.de> 1721642927 +0000

spi: Rework FEATURE_QPI

Alas, a single feature flag is not enough. QPI requires enter/exit
commands and there are at least two competing sets of opcodes. More-
over,  the current flag  was sometimes accidentally used for chips
that can only do quad-i/o for address/data phases but not full QPI.

So, add a lot of new flags and go through all the entries that have
currently FEATURE_QPI set.  Additionally, note the amount of dummy
cycles required by read commands in QPI mode, and whether and how
these can be configured.

Change-Id: Id7310af07b2fdbedb7b051e9395ea967cb345d16
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/45
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>