We also intend
to upstream complete DTS files for EIC7700 so the bindings can be validated
against real hardware.

I suggest you prioritise this. ARM-SOC is pretty flexible for
accepting work in progress support for new SoCs. All you really need
is for the board to boot to a login prompt on a serial port using an
initramsfs. So the .dtsi and .dts file can be very slim, CPUs, memory
and UARTs.

Once you have that merged you can work on the other drivers, their
bindings, etc.

As Russell pointed out, at the moment, most of the code you have in
the kernel is unusable, so it is a candidate for being thrown out.

       Andrew