Sure; Linux already has a driver for a variant of the USB-C chips in these Macs, so normal functionality should work with minimal changes. I don't know if the driver exposes the low-level command protocol to userspace off the top of my head (since we need that to send vendor-specific commands), but if it doesn't, we can probably get away with just using raw I²C access to the chip directly, via i2c-dev. Alternatively, we could add an interface, e.g. a debugfs entry for the Type-C driver that exposes raw commands.

Not sure what approach we'll end up with, but there are certainly multiple ways of doing this under Linux.