QMK kernel module - connect your keyboard switches directly to the gpio of your raspberry pi, no keyboard controller needed!
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GitHub - qmk/qmk_kernel_module: An experiment with a Raspberry Pi running QMK
https://github.com/qmk/qmk_kernel_module
An experiment with a Raspberry Pi running QMK. Contribute to qmk/qmk_kernel_module development by creating an account on GitHub.
I found this while looking for ways to make cyberdecks smaller - a keyboard controller board can be just as big as a pi zero, wasting much needed space. The QMK kernel module allows the raspberry pi to be used as a keyboard controller, while still running a full os.