Unfortunately, FITs does not have any settings for SMBus enable/disable and so on. In general, this program for Edisonville_Rangeley is very poor settings.
Thanks for youre advice Kyösti! I add files with logs. I tried to play with the enable_smbus() function but without result. Rather, the result is the same - no devices on i2c-1.
You can see the comparison of devices on (SMBus0) i2c-1 bus with the OEM Bios and with Coreboot bios in i2cdetect.log.
Could nuvoton superio somehow affect the SMBus?
I also noticed errors in dmesg output such:
[ 93.737732] i801_smbus 0000:00:1f.3: Timeout waiting for interrupt!
[ 93.744750] i801_smbus 0000:00:1f.3: Transaction timeout
Best Regards,
Dmitry Ponamorev