Re: [PATCH v7 0/6] serial: mvebu-uart: Support for higher baudrates

Pali Rohár
2022-01-14T23:22:09Z

On Friday 14 January 2022 15:16:55 Stephen Boyd wrote:
> Quoting Pali Rohár (2022-01-14 15:05:49)
> > On Friday 14 January 2022 14:56:58 Stephen Boyd wrote:
> > >
> > > If we're adding new support why can't we break with backwards
> > > compatibility for the binding and do it a different way?
> >
> > Because DTS are backwards compatible. I was told more times that kernel
> > drivers should work correctly with older DTS files. On some boards are
> > DTB files provided by bootloader and they do not use in-kernel DTS
> > files.
>
> I'm not suggesting to break the kernel driver when used with older DTBs.
> New features are fair game to change the compatible string and do
> something different. If the user wants the new feature they update their
> DTB. We shouldn't be constrained by backwards compatibility here.

And what do you suggest to do? Separate UART0 and UART1 nodes are still
needed because as Mark wrote stdin-path and stdout-patch could be
different.