linux-kernel - Re: [PATCH 1/2] arm64: dts: qcom: sm8550: Fix compile warnings in USB controller node

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Message-ID: <481c8d6d-5ea0-46c9-97a6-f41f1a75e156@linaro.org>
Date: Mon, 8 Dec 2025 09:26:59 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Krishna Kurapati <krishna.kurapati@....qualcomm.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: qcom: sm8550: Fix compile warnings in USB
 controller node

On 12/3/25 16:07, Krzysztof Kozlowski wrote:
> On 03/12/2025 15:48, Krishna Kurapati wrote:
>> With W=1, the following error comes up:
>>
>> Warning (avoid_unnecessary_addr_size): /soc@...sb@...0000: unnecessary #address-cells/#size-cells without "ranges", "dma-ranges" or child "reg" or "ranges" property
>>
>> This is because the child node being removed during flattening and moving
>> to latest bindings.
>>
>> Fixes: 33450878adfc ("arm64: dts: qcom: sm8550: Flatten the USB nodes")
> 
> 
> I don't fully understand that original commit - it explicitly changed
> address/size-cells from 2 to 1 and 0, so keeping address/size-cells was
> kind of intentional. Anyway, these should not be needed, so:
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>

They were kept to allow adding usb submodes representing usb devices,
as the bindings allows. It's not _needed_ until we add some subnodes.

Neil

> 
> Best regards,
> Krzysztof