I am using multilpe Sparky2 boards with LibrePilot and AttoPilot 90A current &volage sensor, connected as described on Wiki. It works just fine with I guess recent commit 19fa385f28d8ba8d95e5db79ed5d947ea4687fa2. At least I am getting values nicely displayed on OSD.
First screenshot, how to enable battery module, and set adc0, adc1 routing.
Second screenshot how I entered calibration values from wiki, they're not exact for my sensor, but I didn't bother for correcting them either, since sensor is not that accurate and will give approximate values anyway.
Third screenshot shows values in GCS from aircraft (motors not spinning) copter is laying on my bench and powered via PSU.