They’re less popular in the hobby world, but the Freescale/NXP i.MX6 family has absolutely fabulous mainline Linux support. There’s still a Freescale tree, but

They’re less popular in the hobby world, but the Freescale/NXP i.MX6 family has absolutely fabulous mainline Linux support. There’s still a Freescale tree, but for most functionality you don’t need it. A few years back a client of mine needed some other functionality that wasn’t available in the version that Freescale forked for their tree and they wanted me to come in and assess what it would take to backport the driver they needed or basically make our own fork that forward-ported whatever Freescale mojo was needed. As it turned out, I spent a couple of hours messing around a bit with some device tree configuration to make it work with the peripherals on their custom carrier and a bit of `make menuconfig`… and it booted right up on Linus’ tree.