Recently work got underway on the new M1 Pro / M1 Max for Linux that fortunately isn't too invasive for changes over the original M1. With the Linux 5.16 kernel there is the M1 PCIe driver , Apple CD321X USB , and then ahead for Linux 5.17 already queued up is an Apple PMGR driver, PCIe clock gating, and DT updates .
The latest out this weekend are the patches for an Apple SPI controller driver . This SPI driver is based on SiFive's driver and was adapted to work with Apple SoCs. The driver has been successfully tested with a patched version of the Apple SPI keyboard driver for Linux, but the Asahi Linux crew says they are going to be writing a new driver for the keyboard.
Also posted today was the v3 patches getting the SimpleDRM support . This series simply gets the SimpleDRM code working nicely as an alternative to using SimpleFB. Ultimately the Apple M1 Linux developers are still working towards a proper full-featured Direct Rendering Manager driver to go along with Mesa drivers for OpenGL/Vulkan, but that is all still a big work-in-progress effort.
Rounding out the recent Apple M1 activity on the Linux kernel mailing list are recent Apple PMU patches .
Everything continues moving forward for the project and will be interesting to see how well it all works out once there is a convenient Asahi Linux installer and the 3D graphics support begins to take shape for a usable daily desktop/laptop system.