Qualcomm Snapdragon 200 (MSM8212)

General info
MSM8212 is a low-end SoC released in 2013, with only out-of-tree mainline support (for now).

There is also another variant, MSM8610, which has only 2 cores and is mostly the same.

It is pretty similar to MSM8974 and MSM8226 so some drivers can be reused from them as a reference.

CPU
All cores initialize properly now and CPUIdle seems to work fine.

USB
Works. Detectable from PC.

Regulators
As of Nov 7th 2021, SMD and SPMI regs are brought up

DRM
This is essential for bringing up GPU and panel. MSM8212 (and all 2xx snapdragon SoCs) seem to be using MDP3, which is currently not supported in mainline.

Tree
https://github.com/Mainline4Lumia/linux-next/tree/for-upstream/msm8212