Re: Phandles

[Krzysztof Kozlowski <krzk@kernel.org>]

On 13/04/2026 09:10, Kyle Bonnici wrote:
> 
> 
>> On 13 Apr 2026, at 08:37, Krzysztof Kozlowski <krzk@kernel.org> wrote:
>>
>> On 12/04/2026 18:37, Kyle Bonnici wrote:
>>>>>> Case 1:
>>>>>> / {
>>>>>>    node1 {
>>>>>>         pwms = <1 &pwm0 1 20 PWM_POLARITY_NORMAL>;
>>>>>>
>>>>>>         Here the first cell '1' is not a phandle.  
>>>>>
>>>>> Here the compiler is making an assumption here that all `pwms` properties must be specifier properties and all use `pwm` specifier.
>>>>
>>>> I think the purpose of 'select: true' is to have the binding always applied:
>>>> https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/pwm/pwm-consumer.yaml#L15
>>>>
>>>
>>>
>>> I’m having trouble finding where the Devicetree Specification (v0.4) mandates that all binding systems must extend dt-schema. 
>>> Since this requirement isn't explicitly in the spec, it follows that the WARNING_PROPERTY_PHANDLE_CELLS validation belongs in dt-validate rather than within dtc itself.
>>
>>
>> So you want to have a property with values not being phandle? The spec
>> defines that properties like "pwm" must contain "value of properties
>> with a phandle value type". Therefore what does '1' represents in your
>> example?
> 
> I am just building and maintaining an LSP to assists Zephyr and Linux developers alike and what is technically
> allowed in Zephyr is not allowed in Linux. The issue here is that DTC is warning zephyr users about it. 

Please wrap your email responses to mailing list style.

> I also find my self in the wrong to enforce these types for Zephyr dts usage given all documentation I have seen 
> so far. 

To repeat my question:
What does '1' stand for?

Best regards,
Krzysztof