Re: DT Query on "New Compatible vs New Property"

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On 3/13/2024 4:49 AM, Srinivas Kandagatla wrote:
> 
> On 12/03/2024 17:25, Trilok Soni wrote:
>> On 3/12/2024 10:21 AM, Srinivas Kandagatla wrote:
>>>
>>>> Basically, I would prefer better than "qcom, fw-managed" since this is not
>>>> a qcom specific problem.
>>>
>>>
>>> We already have something like this in mainline where the BAM DMA controller is remotely powered.
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml?h=v6.8
>>>
>>
>> As you can see it is already fragmented. Why we need to create one more approach
>> which is not scalable and specific to SOC vendor?
> 
> The whole issue around this new checks is that the driver/binding is not designed to expect same set of resources from different TYPES of providers.
> If the driver was designed to support opp's and power domains and make the resources handle in a unified way then some/all of these changes will naturally fit in.
> 
> 
>>
>> SCMI or RPMI based firmware is not a QC specific. I also have allergic reaction
> 
> I agree this are not QC specific, am fine with generic dt-binding like firmware-managed-resources or something on those lines if DT-maintainers are happy with.
> 
> What is your suggestion?

Yes, DT-spec will be a good start.

> 
> 
>> when I see drivers modified w/ if (fw_managed) {..} but that is a discussion
> 
> I don't think we have a choice here, either we do this check at compatible level or dt-property level or resource level in every drivers.

I don't understand yet why we don't have any other choices but do the conditional checks? Maybe explaining
with the example will help? Start w/ clocks?


-- 
---Trilok Soni





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