ODROID HC2: Alpine Linux kernel

Description

In !3006 (merged) an attempt is made to use the real deal: the mainline Linux kernel from kernel.org with the default exynos_defconfig and pmOS required kconfigs. Before that, I tried to upstream these configs to Alpine Linux to use their linux-lts package instead. However, the ODROID HC2 cannot find any USB controllers if I did that. I also tried to use linux-postmarketos-exynos5 but that crashes heavily when bringing up the CPUs.

Next steps

• Find out why the Alpine Linux kernel doesn't find USB controller to access USB 3.0 HDDs.
• Upstream config changes to Alpine Linux
• Change the ODROID HC2 device package to use linux-lts or linux-edge

Personally, I have no idea why this doesn't work, so I hope somebody steps in to figure this out.