A common abstract API for hardware interfaces in Julia?

[Klafyvel]

Hi there, I'm starting to write a high-level API for the MCP2221 chip (I already have the low-level API working). Some of this involves GPIO handling, that is going to be very similar to what's done here (setting them as input/output, querying their current state, maybe analog IO, etc...). An abstract I²C interface could also be interesting. What do you think about specifying a common abstract API for these? Do you know any other projects that may be interesting to add to such a kind of API?