Re: Mixed types of values inside a single property

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 21/11/2022 15:11, Andy Shevchenko wrote:
> On Mon, Nov 21, 2022 at 02:52:37PM +0100, Krzysztof Kozlowski wrote:
>> On 21/11/2022 13:59, Andy Shevchenko wrote:
>>>
>>> Hi, Rob and Krzysztof!
>>>
>>> Today on SO one question [1] was popped up, and I, remembering a bit of
>>> the code of device properties in the Linux kernel, was a bit surprised of it
>>> in a way that reading DT specification (0.4-rc1 as of today) doesn't clarify
>>> that either.
>>>
>>> Can the specification be a bit more clear about that? Or is it me and the OP of
>>> that question who missed something in the DT spec?
>>>
>>> [1]: https://stackoverflow.com/questions/74517569/reading-tuples-in-a-devicetree
>>
>> I saw question on Stackoverflow and I saw there answers, but what is the
>> question to us?
> 
> Does the specification allows mixed types of the values in the same property?
> Because reading it doesn't give a hint.

I think DT spec allows it ("Format is specific to the property. See the
property definition.") but DT schema mostly not (finite list of property
types). To some level DT schema accepts mixes, e.g. phandle-array
containing phandle and offsets, but that's because phandle is actually
also a number (dtschema/schemas/types.yaml).

Best regards,
Krzysztof