[coreboot] WOL/PCI PME wakeup from S3 Baytrail SoC (Bayleybay CRB)

[Gailu Singh]

Hi Experts,

I have PCIe card that supports wake on lan and it works fine with BIOS. On
sending magic packet System wakes up from S3.

However If I use same Linux image with coreboot wake from PCI device does
not wake the system. System wakes up from S3 using power button only.

I suspected the problem with dsdt and took dsdt binary from bios setup,
disassembled it and replaced dsdt.asl in coreboot with the one from bios to
match dsdt configuration. Now my dsdt and linux image are same but still
system does not wake from PCI PME (WOL) in coreboot but works fine with
bios.

In both cases wakeup is enabled in
/sys/bus/pci/devices/0000\:01\:00.0/power/wakeup

Can you please advise what else could be the problem?

PME signal is connected to GPIOS5 on the SoC.

Best Regards
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