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@agowa338 My impression would be that knowing the fundamentals individually is just required for this kind of tasks. Sure, you could probably get away without it on some subset of devices that are similar enough to what's already supported, but otherwise you'll either end up outsourcing what's actually hard about it to people you'll be asking for help, or you won't really do much.
@agowa338 That said, it's not like it's some kind of black magic only to be known by insiders either. If you play with microcontrollers, can write and debug a I2C driver, set up clocks, find your way in the device tree and hack your phone's kernel and/or u-boot on an existing port, you should already be able to do plenty of useful work on a brand new port just on your own.