75XX Offboard Flash
From embeddedTS Manuals
This needs to be done directly on the SBC. You can find the latest SPI image here. Make sure you decompress the image first before writing.
Backup
Entire SPI flash
spiflashctl -l 1 -R 64 -z 65536 > spiflash.dd
Kernel
spiflashctl -l 1 -R 4095 -z 512 -k part1 > /temp/zImage
Initrd
spiflashctl -l 1 -R 32 -z 65536 -k part2 > /temp/initrd
Restore
Entire SPI flash
spiflashctl -l 1 -W 64 -z 65536 -i /path/to/4mb-spiflash-latest.dd
Kernel
spiflashctl -l 1 -W 4095 -z 512 -k part1 -i /temp/zImage
Initrd
spiflashctl -l 1 -W 32 -z 65536 -k part2 -i /temp/initrd