The original C.H.I.P. documentation can be found here: https://chip-docs.popcorncomputer.com/
Chris Morgan (Macromorgan) over in the CHIP Community on Reddit posted instructions on how to flash Debian 11 to C.H.I.P.
You can find the instructions here: https://www.reddit.com/r/ChipCommunity/comments/qnc53k/updated_mainline_debian_11_image/
- I2C was broken in U-Boot during a changeover to the driver model. Chris Morgan submitted a one-line patch to fix this in mainline.