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

Hi， Arnd,

On 4/3/2026 6:25 AM, 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.
>
>> I did not take this one for now, need clarification, or
>> a new patch that keeps the old compatible string along
>> with the new one, if that is possible.
>>
>>         Arnd
> Regards,
> Inochi

Please ignore this PR. We will have some more change on this patch and 
submit it in next cycle.

Regards,

Chen