[PATCHv4 0/9] Add I2C support for Allwinner SoCs

Arnd Bergmann
2013-06-12T12:38:12Z

On Wednesday 12 June 2013, Maxime Ripard wrote:
> The Marvell and Allwinner controllers share the exact same logic (which
> is definitely not trivial), based on a finite state machine that
> triggers interrupts at each change of state, each state being a state in
> the I2C protocol (like address sent, data received with an ACK, etc.).
>
> The weird thing is that the only difference between the two controllers
> is the register offsets, and that's it. The state numbers, bit index,
> etc, are exactly the same.

Ok, cool. Great someone noticed!

> So yes, I think they both licensed the same IP.

I wonder if it's the Mentor Graphics Inventra mi2c block, which
would make sense given that Allwinner also uses musb.

Arnd