Maybe someone with more time can take mine wip2.patch with VT8237S support and then port it to v3 all-together. Most of the code VT8237R is bit redone, so perhaps it is waste of time to change the code right now. Maybe commit it as-is and then add support for rev S (port from v2?)
Please check the latest patch wip2.patch in thread Re: [coreboot] K8M890 VT8237S status update
Ideas how to proceed?