I'm not sure where this should be reported, but I've tested the stable v1.0-1-g6b9e934 version, which supports a few new chips, and I can successfully PROBE, READ, and WRITE with the following chips:
This is on two different Gigabyte AB350N Gaming WiFi motherboards, flashrom compiled and running as so:
|$ ./flashrom -R|| ||flashrom v1.0-1-g6b9e934 on Linux 4.8.17-tinycore64 (x86_64)|| ||flashrom is free software, get the source code at https://flashrom.org%7C
I have not had occasion to test ERASE on either, so I cannot comment.
What is the proper place to report this information?