Dear Flashrom Developers,

I am experiencing an issue with flashrom v1.1 on Linux 5.15.86 (x86_64) while attempting to flash a Macronix MX25L25635E SPI NOR flash chip on my Conga-TC570 board, which features an Intel® Core™ i5-1145GRE (Tiger Lake) processor.

Issue Details:

• When the flash is clean (filled with 0xFF), I can erase and write successfully.
• However, verification fails, reporting mismatched data.
• The failure occurs at address 0x00000000, with the following error:

  FAILED at 0x00000000! Expected=0x11, found=0x00
  Failed byte count from 0x000000 - 0x01FFFFF: 0x8DD2A6
  

Steps Taken So Far:

1. Checked Write Protection using flashrom -p internal --wp-status → No active protection.
2. Attempted manual erase before writing:

   flash_erase /dev/mtd0 0 0
   flashrom -p internal -w bios.bin
   

3. Loaded Intel SPI modules:

   modprobe intel_spi_pci
   modprobe intel_spi_platform
   

4. Verified SPI device detection:

   ls /sys/bus/spi/devices/
   

   The SPI device appears correctly.
5. Tested alternative flashing methods:
   • Using dd:

     dd if=bios.bin of=/dev/mtd0 bs=4096
     

     Result: Write completes, but verification still fails.
   • Using flashrom -p internal -V for verbose output (logs available on request).

Questions:

1. Is this a known issue with flashrom on Tiger Lake platforms?
2. Could the Intel SPI controller be interfering with writes?
3. Are there any debugging steps or patches I should try?

Any guidance would be greatly appreciated. Thank you for your support!

Best regards,
Lior Salmona