This is the Linux kernel driver for the Google AIY Voice Kit v2 voice bonnet, modified for Ubuntu 6.1.21.
Note: the rt6231 and rl5645 codec drivers were copied from the Linux source tree because the symbols needed in the snd-aiy-voicebonnet driver are not available in DKMS builds.
These files are identical to the ones in the kernel tree at sound/soc/codecs/
Note: the leds-ktd202x, aiy-io, aiy-io-i2c and gpio-aiy-io files are copied from Google originals, suitably modified.