Nick: alzwe
E-mail: alexjlong@web.de
Board: Macbook Air 820-3023-A (chip MX25L6406E/MX25L6408E)
Contents: 
$ flashrom -p ch341a_spi -w "Downloads/APPLE AIR A1369 K21 820-3023-A.bin" -c MX25L6406E/MX25L6408E
flashrom v1.0.1 on Linux 4.19.94-1.pvops.qubes.x86_64 (x86_64)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Macronix flash chip "MX25L6406E/MX25L6408E" (8192 kB, SPI) on ch341a_spi.
Reading old flash chip contents... done.
Erasing and writing flash chip... FAILED at 0x00000010! Expected=0xff, Found=0x5a, failed byte count from 0x00000000-0x00000fff: 0xd0
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000010! Expected=0xff, Found=0x5a, failed byte count from 0x00000000-0x0000ffff: 0x5e29
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000010! Expected=0xff, Found=0x5a, failed byte count from 0x00000000-0x0000ffff: 0x5e29
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000010! Expected=0xff, Found=0x5a, failed byte count from 0x00000000-0x007fffff: 0x443f97
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000010! Expected=0xff, Found=0x5a, failed byte count from 0x00000000-0x007fffff: 0x443f97
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
No usable erase functions left.
FAILED!
Uh oh. Erase/write failed. Checking if anything has changed.
Reading current flash chip contents... done.
Good, writing to the flash chip apparently didn't do anything.
Please check the connections (especially those to write protection pins) between
the programmer and the flash chip. If you think the error is caused by flashrom
please report this on IRC at chat.freenode.net (channel #flashrom) or
mail flashrom@flashrom.org, thanks!