Hello, I’m sharing a successful chip writing operation, that is marked as UNTESTED:
Environment: Machine: MacBook Pro M1 2020 OS: macOS v15.7.5 Flashrom: "v1.7.0 on Darwin 24.6.0 (arm64)" (via homebrew) Programmer: "ch341a_spi" (v1.7) Chip: "S25FL128P……0” (Spansion FL128PIF 3.3v SOP16) Test summary : Successfully recognized the chip type. Successfully read. Successfully erase. Successfully write. Successfully compared flash file with post-writing reading file. Terminal details: April 11th 2026 … erasing chip. ... ds@Ds-MacBook-Pro flash % flashrom -p ch341a_spi -c “S25FL128P......0" -w flash.bin --progress flashrom v1.7.0 on Darwin 24.6.0 (arm64) flashrom is free software, get the source code at https://flashrom.org libusb: info [darwin_detach_kernel_driver] no capture entitlements. may not be able to detach the kernel driver for this device libusb: warning [darwin_detach_kernel_driver] USB device capture requires either an entitlement (com.apple.vm.device-access) or root privilege Cannot detach the existing USB driver. Claiming the interface may fail. LIBUSB_ERROR_ACCESS Found Spansion flash chip "S25FL128P......0" (16384 kB, SPI) on ch341a_spi. === This flash part has status UNTESTED for operations: WP The test status of this chip may have been updated in the latest development version of flashrom. If you are running the latest development version, please email a report to [email protected] if any of the above operations work correctly for you with this flash chip. Please include the flashrom log file for all operations you tested (see the man page for details), and mention which mainboard or programmer you tested in the subject line. You can also try to follow the instructions here: https://www.flashrom.org/contrib_howtos/how_to_mark_chip_tested.html Thanks for your help! Reading old flash chip contents... [READ: 100%]...done. Updating flash chip contents... [WRITE: 100%]...Erase/write done from 0 to ffffff Verifying flash... [READ: 100%]…VERIFIED. ds@Ds-MacBook-Pro flash % flashrom -p ch341a_spi -c "S25FL128P......0" -r read_post_write.bin --progress ds@Ds-MacBook-Pro flash % cmp flash.bin read_post_write.bin ds@Ds-MacBook-Pro flash % (identical files) —————————————————— Thanks! Best, Daniel
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