linux-kernel - Re: [PATCH v1 08/14] dt-bindings: mtd: relax the nvmem compatible string

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Date:   Wed, 31 Aug 2022 10:55:00 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Michael Walle <michael@...le.cc>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>, Li Yang <leoyang.li@....com>,
        Rafał Miłecki <rafal@...ecki.pl>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Frank Rowand <frowand.list@...il.com>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        netdev@...r.kernel.org, Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: Re: [PATCH v1 08/14] dt-bindings: mtd: relax the nvmem compatible
 string

On 31/08/2022 10:48, Michael Walle wrote:
> Am 2022-08-31 09:37, schrieb Krzysztof Kozlowski:
>> On 26/08/2022 00:44, Michael Walle wrote:
>>> The "user-otp" and "factory-otp" compatible string just depicts a
>>> generic NVMEM device. But an actual device tree node might as well
>>> contain a more specific compatible string. Make it possible to add
>>> more specific binding elsewere and just match part of the compatibles
>>
>> typo: elsewhere
>>
>>> here.
>>>
>>> Signed-off-by: Michael Walle <michael@...le.cc>
>>> ---
>>>  Documentation/devicetree/bindings/mtd/mtd.yaml | 7 ++++---
>>>  1 file changed, 4 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/mtd/mtd.yaml 
>>> b/Documentation/devicetree/bindings/mtd/mtd.yaml
>>> index 376b679cfc70..0291e439b6a6 100644
>>> --- a/Documentation/devicetree/bindings/mtd/mtd.yaml
>>> +++ b/Documentation/devicetree/bindings/mtd/mtd.yaml
>>> @@ -33,9 +33,10 @@ patternProperties:
>>>
>>>      properties:
>>>        compatible:
>>> -        enum:
>>> -          - user-otp
>>> -          - factory-otp
>>> +        contains:
>>> +          enum:
>>> +            - user-otp
>>> +            - factory-otp
>>
>> This does not work in the "elsewhere" place. You need to use similar
>> approach as we do for syscon or primecell.
> 
> I'm a bit confused. Looking at
>    Documentation/devicetree/bindings/arm/primecell.yaml
> it is done in the same way as this binding.

Yes. primecell is like your mtd here. And how are other places with
primcell (like other places with user-otp) done?

> 
> Whereas, the syscon use a "select:" on top of it. I'm
> pretty sure, I've tested it without the select and the
> validator picked up the constraints.
> 
> Could you elaborate on what is wrong here? Select missing?

You got warning from Rob, so run tests. I think you will see the errors,
just like bot reported them.

Best regards,
Krzysztof