Utility to simplify dumping EC registers
Build with:
gcc -o ecreg-dump ecreg-dump.c
You will need the ec_sys module loaded with write_support enabled.
On Fedora - so the ec_sys module is available need to run the debug kernel. Do:
sudo dnf install kernel-debug
Then load ec_sys module, with write support so we can access extra hidden registers
sudo modprobe ec_sys write_support=1
Recommend unloading when done (rmmod ec_sys)