Re: [PATCH v2 1/2] dt-bindings: pinctrl: document the Milos Top Level Mode Multiplexer

[Krzysztof Kozlowski <krzk@kernel.org>]

On 03/07/2025 12:04, Konrad Dybcio wrote:
> 
> 
> On 03-Jul-25 09:44, Luca Weiss wrote:
>> On Thu Jul 3, 2025 at 9:41 AM CEST, Krzysztof Kozlowski wrote:
>>> On Wed, Jul 02, 2025 at 05:56:16PM +0200, Luca Weiss wrote:
>>>> Document the Top Level Mode Multiplexer on the Milos Platform.
>>>
>>> What is Milos platform? Does it have some sort of model number how we
>>> usually expect? Wasn't this SM7325 or similar?
>>>
>>> The problem with such new naming that it awfully sounds like family
>>> names, so just expand the name and explain it.
>>
>> Please go argue with Bjorn/Konrad about this, wasn't my idea.
>>
>> https://lore.kernel.org/linux-arm-msm/aGMI1Zv6D+K+vWZL@hu-bjorande-lv.qualcomm.com/
>> https://lore.kernel.org/linux-arm-msm/b98d305b-247f-415b-8675-50d073452feb@oss.qualcomm.com/
> 
> Milos is the "real-est" name of this silicon. All the associated
> S[AM]|QC[MS]s are just variations of it, with different fusing.
> 
> You'll stumble upon it across e.g. firmware build strings, as
> well as in any documentation pieces.
> 
> There are various internal reasons for the switch, but the most
> obvious external-facing one is not to have the user buy a devkit
> and wonder whether they should use QCS9100 or QCS9075 DTB, and
> why there's zero drivers code for these magic numbers (they
> include SA8775P). We can simply point them to "codename" and
> all C code will refer to it as well.

These are different SoCs, optionally with different firmware, so they
cannot use the same top-level compatible chain. I hope you did not
propose that.

For me list like "qcs9100, sa8775p" is clear enough, but if you want
"qcs9100, koala-bear" or "brown-bear, koala-bear" it is fine as well.
You just cannot use koala-bear for all of them.


Best regards,
Krzysztof