linux-kernel - Re: [PATCH v3 1/3] dt-bindings: phy: qcom,qmp: Add PCIe qcom,refclk-always-on property

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Date:   Wed, 6 Dec 2023 18:40:09 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Krishna Chaitanya Chundru <quic_krichai@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_vbadigan@...cinc.com, quic_ramkri@...cinc.com,
        quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
        quic_vpernami@...cinc.com, quic_parass@...cinc.com
Subject: Re: [PATCH v3 1/3] dt-bindings: phy: qcom,qmp: Add PCIe
 qcom,refclk-always-on property

On Fri, Dec 01, 2023 at 02:25:44PM +0100, Krzysztof Kozlowski wrote:
> On 01/12/2023 13:30, Manivannan Sadhasivam wrote:
> >> What I said before:
> >> "Again, third time (once from Bjorn, once from Dmitry), rephrase
> >> property name and description to describe the hardware issue. I see
> >> description improved, but not the property name. Again in the end of
> >> description you say what Linux should do. Bindings do not describe Linux
> >> OS."
> >>
> > 
> > You didn't answer my question:
> > 
> > "I see a plenty of properties similar to this one instructing the OS to keep some
> > resource ON to workaround hardware issues. So they are all wrong?"
> 
> They are not the best, but it all depends on the individual case.
> 
> > 
> > If you say they are wrong, why are they approved in the first place?
> Because we don't have time to keep digging what the driver is doing and
> what is claimed in DT. Some people don't even CC us on the driver.
> 

OK. How about, "qcom,broken-refclk"? This reflects the fact that the default
refclk operation is broken on this platform, so the OS should be prepared for
it (by keeping it always on).

- Mani

> 
> Best regards,
> Krzysztof
> 

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