linux-kernel - Re: [PATCH] dt-bindings: phy: sc8280xp-qmp-pcie: Disallow bifurcation register on Purwa

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Message-ID: <ede201f5-fd27-4ac0-b524-638df7c412ad@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 16:14:55 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        YijieYang <yijie.yang@....qualcomm.com>
Subject: Re: [PATCH] dt-bindings: phy: sc8280xp-qmp-pcie: Disallow bifurcation
 register on Purwa

On 1/19/26 3:50 PM, Krzysztof Kozlowski wrote:
> On 19/01/2026 12:48, Konrad Dybcio wrote:
>> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
>>
>> Neither of the two Gen4x4 PHYs found on Purwa supports bifurcation.
>> The PHY is however physically laid out as if it were to, since there
>> are two separate ports (A/B).
>>
>> Split out a new if-then block to un-require the bifurcation register
>> handle to squash this warning:
>>
>> purwa-iot-evk.dtb: phy@...4000 (qcom,x1p42100-qmp-gen4x4-pcie-phy): 'qcom,4ln-config-sel' is a required property
> 
> Warning does not exist in the kernel, so please do not reference it.

Only because no Purwa-based device enables it, so I think it's valid

If you really want to, I can resend with that mention removed

Konrad