[PATCH v9 07/10] arm64: dts: ls1046ardb: Add serdes bindings

[Krzysztof Kozlowski]

On 27/01/2023 17:11, Sean Anderson wrote:
>>>>>
>>>>>  .../boot/dts/freescale/fsl-ls1046a-rdb.dts    | 112 ++++++++++++++++++
>>>>>  drivers/phy/freescale/Kconfig                 |   1 +
>>>>
>>>> The phy driver Kconfig change shouldn't be part of this patch.
>>>
>>> I put it here for bisectability, since this is the point where we need
>>> to enable it. But I can do this in a separate patch if you want.
>>
>> From DT ABI perspective, it's already broken anyway if you need to change
>> kernel and DT atomically.
> 
> AIUI new kernels must work with old device trees, but new device trees need not
> work with old kernels. So a change like this is fine, since the kernel won't
> touch the serdes if it isn't supplied.

You used the argument "bisectability". If the patchset is not
bisectable, the ABI is broken.

Best regards,
Krzysztof