Sigh. My uname -r emitted 5.4.3-tinycore, so I used this file:
http://tinycorelinux.net/11.x/x86/tcz/i2c-5.4.3-tinycore.tczI copied the file to /mnt/sda1/tce and then rebooted. No change.
I tried the file in /mnt/sda1/tce/optional (and /mnt/sda1/tce/ondemand) and still no change.
I repeated all of the above with the tinycore64 version of the file and then with the same files from the x86_64 branch. Still no change.
So, is there another step required to actually ACTIVATE the new file? Or is there a different tce folder than the only one I have found?
Also, FWIW, every time the system boots there is an error printed at the $ prompt, just before the GUI launches:
udhcpc: SIOCGIFINDEX: No such device
I have been assuming that us the DHCP client complaining that there are no network devices for it to use, but maybe it is a symptom of something else?