hi,
I checked the PROBE - READ - ERASE - WRITE operations of the W25Q256JV_Q flash with J-Link and CH341 spi writers. the flashrom version was the newest development release at 2025-04-14 (#4d4688ccf132c580107b013d2d929a0816aa89c1) I made a little modification in the 'jlink_spi.c' source, because I use the power supply from the J-Link device pin 19. this power is 5V, I put a 3.3V LDO (HT7333) after it, and this LDO (and decoupling capacitors) need more time to fix output voltage. I attached the patch file. [ I tried to ask merge request via Jenkins, but it was too complicated for modify one char in the source ;-) ]
my flash type was Winbond 25Q256JVEQ, which recognized by flashrom to W25Q256JV_Q or W25Q256FV, both type probed, read, wrote, erased, both modality worked fine.
regards,
Attila