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
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