On 25. Jun 2018 18:18 [email protected] <mailto:[email protected]> wrote:
> you can generally boot without a complete port. But you can also damage > the hardware if you are not careful. Beside the devicetree settings (pay > attention when it comes to the voltage regulator settings!), the GPIO > configuration should also match your board. You can try to boot without > GPIO configuration (it should be safe because the hardware has to expect > the reset defaults for the GPIOs). But *never* try to boot with a copied > GPIO configuration from another board. Thank you Nico for the warnings! A few questions: 1. Is it safe to leave default VR settings from Kabylake Reference Board? 2. Can the laptop work properly without GPIO? I don't know if there is a way to dump the GPIO config in vendor firmware on Kabylake. 3. Are there other settings that could damage the hardware? > Regarding the EC, you can learn a lot about its interface from the ven- > dor's ACPI implementation. Unless the board uses a lot of PnP interfaces > of the EC (unlikely for a modern laptop), the datasheet is usually not > helpful. What you really would need is documentation about the EC firm- > ware and its OS interface. And you'll likely not get that. > Can the laptop boot to Linux without EC support in coreboot? Regarding the ACPI implementation, can that be dumped using acpidump and then used in the ec.asl file? Thanks, Chris
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