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Message-ID: <db32d4b6-9a88-4f4a-2ab8-878b21d502ac@linaro.org>
Date:   Thu, 19 May 2022 12:36:08 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Yassine Oudjana <y.oudjana@...tonmail.com>,
        Andy Gross <agross@...nel.org>
Cc:     Alec Su <ae40515@...oo.com.tw>, bjorn.andersson@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        sboyd@...eaurora.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: qcom: msm8996-xiaomi-natrium: Add support
 for Xiaomi Mi 5s Plus

On 19/05/2022 12:06, Krzysztof Kozlowski wrote:
> On 19/05/2022 12:01, Krzysztof Kozlowski wrote:
>> On 19/05/2022 11:57, Yassine Oudjana wrote:
>>>>
>>>> There is no such property documented. Either add bindings, or drop.
>>>>
>>>>> + qcom,board-id = <47 0>;
>>>>
>>>>
>>>> The same.
>>>
>>> These properties are already used in many device trees; they are
>>> needed to let the bootloader pick a DTB, but yes they aren't
>>> documented currently. devicetree/bindings/arm/qcom.yaml would
>>> probably be a good place to put them.
>>
>> Which means each person is using them and not caring about
>> documenting... they need to be documented. I am not even sure if they
>> should be accepted.
>>
>> The DTS describes hardware, not bootloader specific details. The
>> hardware - board - is defined by compatible and bootloader should use
>> it. Adding new properties because someone decided "I don't like
>> compatibles" is not appropriate.
> 
> There is prior art:
> https://lkml.org/lkml/2015/10/26/651
> https://lore.kernel.org/all/CAL_JsqJAOEvs08Jydn9wWtM7-Oxd=MmmDER48VRF7z3Gkzt0CQ@mail.gmail.com/

I found the discussions and I see it stalled. No objection from my side
on this one here. We should solve it on other level.,


Best regards,
Krzysztof

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