Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/34948 )
Change subject: superio/nuvoton: add a driver for nct668xd ......................................................................
Patch Set 8:
I had a board that used it (see 34947) but unfortunately the board is dead so I can't continue here. Maybe someone with a Lenovo TS P320 or TC M800/M900 (same board) wants to finish this.
Oh :(
There are probably some more boards using those SIO chips. IIRC one of the boards I had on my desk had some Nuvoton SIO with an external SPI flash; probably for firmware. I can have a look tomorrow and if I still have it, it has one of those SIOs and I find some cardboard box it fits into, I could send it to you if you want to port it. If I don't reply within the next 4 days to this, please poke me again; will be quite busy this week...