[PATCH v1 4/5] net: macb: Compatible as per device tree

[Bin Meng]

On Thu, Nov 11, 2021 at 9:17 PM <Ivan.Griffin at microchip.com> wrote:
>
> > I agree with Bin here. You shouldn't introduce a new compatible just for
> > u-boot. If you need one, please to it first in linux and get an ACK there.
> > Or at least there should be patches for it pending in linux and it should
> > be likely, that they will be accepted.
> >
> > Please work towards having one binding for u-boot and linux.
> >
> > -michael
>
> I think both Michael and Bin are right, but that maybe this has gone circular.
>
> IIRC, Linux *doesn't need* any extra bindings because its driver already
> supports 64-bit DMA.
>
> Padmarao's original patch added equivalent 64-bit functionality to the
> driver in U-Boot, but this was rejected.
>

I am not sure why it was rejected. Is that because it breaks some
other platforms?

> Instead I think the suggestion was to add a device-tree binding to choose 32 or
> 64-bit DMA...  however, there is no reasonably way of upstreaming this into
> the Linux device-tree, as Linux doesn't need it... so he is left in a Catch-22.
>
> A way forward may be to go back to his original approach and get the U-Boot
> driver functionality updated so that it works similarly to the Linux driver
> (and thus can use the same device-tree stanza)?

Let's go back to the original approach and see what happens.

Regards,
Bin