75XX Offboard Flash

This needs to be done directly on the SBC. You can find the latest SPI image here.

Backup

Entire SPI flash

spiflashctl -l 0 -R 64 -z 65536 > spiflash.dd

Kernel

spiflashctl -R 4095 -z 512 -k part1 > /temp/zImage

Initrd

spiflashctl -R 32 -z 65536 -k part2 > /temp/initrd

Restore

Entire SPI flash

dd if=/path/to/4mb-spiflash-latest.dd bs=512 conv=sync | spiflashctl -l 0 -W 64 -z 65536 -i -

Kernel

spiflashctl -W 4095 -z 512 -k part1 -i /temp/zImage

Initrd

spiflashctl -W 32 -z 65536 -k part2 -i /temp/initrd