linux-kernel - Re: [PATCH v1 1/3] arm64: dts: qcom: msm8996: Fix 'in-ports' is a required property

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Message-ID: <22ddb4aa-a908-49c3-8eb4-2399c7c5bc37@quicinc.com>
Date:   Thu, 30 Nov 2023 21:37:47 +0800
From:   Jinlong Mao <quic_jinlmao@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Tao Zhang <quic_taozha@...cinc.com>
Subject: Re: [PATCH v1 1/3] arm64: dts: qcom: msm8996: Fix 'in-ports' is a
 required property



On 11/30/2023 9:35 PM, Krzysztof Kozlowski wrote:
> On 30/11/2023 14:12, Jinlong Mao wrote:
>>
>>
>> On 11/30/2023 8:06 PM, Krzysztof Kozlowski wrote:
>>> On 30/11/2023 12:15, Jinlong Mao wrote:
>>>>
>>>>
>>>> On 11/30/2023 4:55 PM, Krzysztof Kozlowski wrote:
>>>>> On 29/11/2023 15:38, Mao Jinlong wrote:
>>>>>> The inport of funnel@...3000 connects to a source which is not supported
>>>>>> in current linux kernel. Remove the device tree node of funnel@...3000
>>>>>> to fix the warning. It will be added once the driver support to the
>>>>>> source is added to linux kernel.
>>>>>
>>>>> Thanks for the changes, but that's not correct reason to remove DTS
>>>>> code. What kernel supports or not, should be irrelevant for the DTS. DTS
>>>>> for example is used in other projects - did you check if they have the
>>>>> same issues? Anyway, DTS describes the hardware, so how current kernel
>>>>> support defines what is and what is not in the hardware?
>>>>>
>>>>>
>>>>> Best regards,
>>>>> Krzysztof
>>>>
>>>> Hi Krzysztof,
>>>>
>>>> The funnel dt node must have in-ports node. It is to describe the input
>>>> connection of funnel HW. But there is no dt_binding doc to describe the
>>>> DT node of the HW connected to funnel@...3000. So remove the funnel to
>>>> solve the warning as of now. The funnel will be added back once driver
>>>> and dt_binding are added for the HW.
>>>>
>>>> Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
>>>
>>> Why we cannot add now the binding for the connected hardware? It's not
>>> really related to the driver.
>>>
>>> Best regards,
>>> Krzysztof
>>
>> Do you mean yaml file can be added before the driver code is merged ?
> 
> Yes, the binding. YAML is only the language. We don't write YAMLs, we
> write bindings.
> 
> Best regards,
> Krzysztof

ok, Thanks. I will prepare the binding file.

Thanks
Jinlong Mao

>