Hello,
I was able to spare some time and looked a bit more into this.
I found that channel_a_driver config was not really implemented in ftdi_eeprom for Type_R chips.
Also handling of the type_R high_current_drive parameter was missing or not working.
I have also added some more information to the ftdi_eeprom/example.conf file and added a --verbose option to get some more output when using the --eeprom-read option.
The changes are based on commit 0209a3633dc877a577af07d883eb5059e22f6a91 and are currently available here: https://github.com/5inf/libftdi/commits/master
If there is interest in integrating any of these changes into the official codebase, what is the preferred procedure for sending a patch?
Regards,
Holger