The interface is proprietary and only a few know bits are implemented. Have a look at the thinkpad_acpi kernel module or vendor ACPI code for additional bits.
Some basic fan and power management functionality is implemented. Without a datasheet (by Lenovo) for every EC generation it's impossible to tell what needs to be implemented. Regards, Patrick Martin Kepplinger <[email protected]> schrieb am Do., 14. März 2019, 14:23: > Am 14.03.2019 11:46 schrieb Nico Huber: > > Hi Martin, > > > > Am 14.03.19 um 10:19 schrieb Martin Kepplinger: > >> So, I'm looking into h8 EC access. > >> > >> Where does ec_set_bit(0x3a, 0) for audio-mute or ec_set_bit(0x3a, 6) > >> for wwan-enable > >> come from (let's keep that as an example)? > > > > this uses a software interface that is defined by the program that runs > > on the EC, aka the EC firmware. The EC firmware exposes an address > > space > > (usually up to 256B) for communication with the host firmware (e.g. > > coreboot). Usually, there is *no* relation to hardware registers. > > > > Ok. Patrick, do you have any more details on the interface here, and > what is > or isn't implemented in coreboot? > > thanks > > martin > >
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