Any information related to investigating the Intel Edison kernel, U-Boot, SoC hardware, ACPI, tools to build the image etc.

Here is the meta-intel-edison that builds, tries to stay up to date. Master is based on Yocto Poky Gatesgarth LTS 5.10.yy vanilla kernels. It builds a 32bit kernel (Gatesgarth branch 64bit) with ACPI enabled and corresponding rootfs. Telegram group: https://t.me/IntelEdison Web-site:

xFSTK stitcher and downloader by Intel with patches from community

Yocto BSP layer for ACPI enabled boards

Firmware Analysis Tool

Here is andy-shev's linux repo for Intel Edison, branched off each kernel release. It is part of edison-fw/meta-intel-edison

"Das U-Boot" Source Tree. This is a fork tracking andy-shev:acpi and branching off his releases to stabilize our meta-intel-edison image build. andy-shev has declared upstream v2020.04 contains all necessary patches and should be used from now on.