Re: [PATCH] ARM: dts: turris-omnia: Add mcu node

Andrew Lunn
2022-09-04T01:03:26Z

> > I'm also not sure what the DT people will say about the node name mcu.
> > I don't see any examples of that in the binding documentation. They
> > might request you rename it to gpio-controller, unless it does more
> > than GPIO? And if it does do more than GPIO we are then into mfd
> > territory, and the binding then becomes much more interesting. Then we
> > start the questions, are you defining a ABI now, before there is even
> > a driver for it?
> >
> > Andrew
>
> Yes, there is already driver. See my previous email, I mentioned it and
> also I wrote link for this driver. Moreover now driver is merged in
> upstream u-boot.

I'm not comfortable accepting a DT binding for a driver which does not
exist in Linux. As i said, there are interesting ABI issues here, and
it could be the MFD, GPIO or reset Maintainers don't accept a binding
until a Linux driver exists.

At minimum, you need an Acked-by from the GPIO Maintainer, of the
binding before this DT change is merged via MVEBU.

Andrew