Re: [coreboot] Powersavings: 8W of difference between bios and coreboot

[Alexander Couzens]

Hi Charlotte,

here are some description of the EC in your board. Don't know how much
you already know.

The Thinkpad has 2 EC controller.

1x Thinker
1x H8S (W530 has a SMSC chip).

The ectool dump only shows a buffer, which both side(host+ec) can use to
communicate.

The ectool usually talks to the H8S and not to the Thinker. There is a
way to community to the Thinker using different I/O address.

---------
|Chipset|
---------
   |
   | LPC
   |
-------
| H8S |
-------
   |
   | SPI
   |
---------
|Thinker|
---------

best,
lynxis