[M] Change in flashrom[master]: ichspi: Expose flash descriptor regions through get_region()

[Nikolai Artemiev (Code Review)]

Attention is currently required from: Nikolai Artemiev.

Hello build bot (Jenkins), Edward O'Callaghan,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/70127

to look at the new patch set (#8).

Change subject: ichspi: Expose flash descriptor regions through get_region()
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ichspi: Expose flash descriptor regions through get_region()

Region attributes are now stored in a `fd_regions` array after being
decoded in ich9_handle_frap() and used by ich_get_region().

A special cases is handled in ich_get_region(): if there is a gap
between two flash regions, an artificial region is created to fill the
gap. I.e. any address inside the gap will return a region that spans the
gap between the end the of the previous region and the start of the next
region. This allows ich_get_region() to be used to iterate the entire
flash region-by-region.

Read and write operations are assumed to be allowed inside gaps between
regions.

BUG=b:260440773
BRANCH=none
TEST=todo

Change-Id: I019f3f407f6a2a82f686a168457e0e32961ff483
Signed-off-by: Nikolai Artemiev 
---
M ichspi.c
1 file changed, 99 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/27/70127/8