Hello Roman,

On 09.09.22 17:48, roman perepelitsin wrote:
> I use coreboot for ApolloLake CPU (Atom). We have SuperIO WB83627-DHG chip
> on carrier board. LPC enabled, POST codes work normal. But I can't get
> access to SIO under Linux (via port 0x2e). Superiotool can't find chip.
> Also, I have CPLD on LPCB - I use it to view LPC transactions - so, then I
> try to out byte to 0x2e - transaction on LPC is none. But, I enable UART0
> on SIO (via devicetree.cb) - and it works fine. Whats wrong?

the W83627DHG has the UART enabled by default, so it's still possible
that coreboot can't access 0x2e either. Do you have a setting for
`lpc_ioe` in your devicetree?

It's easier to help if you'd show your complete mainboard port.

Nico