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@alexeymin that's awesome!

@cas yeah, it really is. Not just for fun, this will speed up further development, because I can now actually interactively interact with devices without need for soldering UART thanks to "fastboot oem run" or maybe even simply exposing acm serial gadget?..

@alexeymin for interacting with U-Boot yes, but not for Linux.

maybe it's technically possible to include the USB stack as part of the EFI runtime, disable USB on Linux and have a custom UART driver which calls into U-Boot, this would be pretty cool tbh