Re: [GIT PULL] RISC-V Sophgo Devicetrees for v7.1

On Fri, Apr 03, 2026 at 06:25:32AM +0800, Inochi Amaoto wrote:
> On Thu, Apr 02, 2026 at 11:43:43PM +0200, Arnd Bergmann wrote:
> > On Thu, Apr 2, 2026, at 04:39, Chen Wang wrote:
> > > For CV18xx serials:
> > > Just a minor patch to replace the compatible for
> > > dma-controller to allow setting DMA channel number.
> > > New bindings and driver part change are picked by
> > > DMA subsytem and this patch handles the left dts
> > > part change.
> > >
> > > Signed-off-by: Chen Wang <[email protected]>
> > >
> > > ----------------------------------------------------------------
> > > Inochi Amaoto (1):
> > >        riscv: dts: sophgo: cv180x: Allow the DMA multiplexer to set 
> > > channel number for DMA controller
> > 
> > Doesn't this change break backwards compatibility with
> > all existing kernels?
> > 
> 
> It will break if a old kernel with the new dtb. But I
> think this will break nothing since the DMA device is not
> used by any devices in the old DTB. And if a user force
> the some device with DMA in the old version, it is just
> not functional and lead to a broken system.

Then commit msg should explain that old compatible just never worked.

Please update the commit msg and fix the DCO.

Best regards,
Krzysztof