@pancake
The spartan definitely not, thats just an FPGA. The Zynq can definitely boot linux as it has a regular ARM processor (i did this on my zynq dev board). I think OMAP can boot it too, along with the Mediatek, Broadcom and Qualcomm chip. I'm not sure about the others.
@nekayee @pancake
But can those boot current day mainline linux, not some special snowflake kernel that was a year old when they released?
The Omap and RK3399 I think can boot mainline.
The rest I'm far less certain about.
Allwinner A13 kaindasodta does now? I think Zynq still has some older kernel I think?
Mediatek, Qualcomm, Samsung and the 286 are far less likely.
@ftg @nekayee @pancake i can't read the Mediatek model number, the ones that are typically in routers (MT7620/7621/7623/7628 etc iirc) should boot mainline, I don't think OpenWRT has a lot of patches there. But there are also radios that have similar model numbers 🙃

@ftg
I think the zynq can boot mainline kernel when compiled for ARM and with the correct modules.

I haven't tried it, but it should be possible i guess
@pancake

@ftg
It heavily depends on how you define "boot mainline linux" because every SoC is gonna have some quirks that the kernel needs to handle differently to boot
@pancake