linux-kernel - Re: [PATCH 09/10] dt-bindings: interconnect: qcom,msm8998-bwmon: Add sc8280xp bwmon instances

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Date:   Thu, 3 Nov 2022 08:21:45 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bjorn Andersson <quic_bjorande@...cinc.com>
Cc:     Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sibi Sankar <quic_sibis@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mike Tipton <quic_mdtipton@...cinc.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] dt-bindings: interconnect: qcom,msm8998-bwmon: Add
 sc8280xp bwmon instances

On 02/11/2022 23:37, Bjorn Andersson wrote:
> On Fri, Oct 28, 2022 at 06:15:50PM -0400, Krzysztof Kozlowski wrote:
>> On 27/10/2022 23:41, Bjorn Andersson wrote:
>>> The sc8280xp platform has two BWMON instances, one v4 and one v5. Extend
>>> the existing qcom,msm8998-bwmon and qcom,sc7280-llcc-bwmon to describe
>>> these.
>>>
>>> Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
>>> ---
>>>  .../devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml | 5 +++++
>>>  1 file changed, 5 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml b/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml
>>> index be29e0b80995..223cd6ecf279 100644
>>> --- a/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml
>>> +++ b/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml
>>> @@ -25,9 +25,14 @@ properties:
>>>        - items:
>>>            - enum:
>>>                - qcom,sc7280-cpu-bwmon
>>> +              - qcom,sc8280xp-bwmon
>>
>> qcom,sc8280xp-cpu-bwmon
>> To match sc7280. I think it's better than my initial choice for
>> qcom,sdm845-bwmon without the cpu part.
>>
> 
> As discussed back then, we omitted "cpu" because there where multiple instances
> of the bwmon block. Would you prefer we give it the "cpu" compatible and
> potentially us it for non-cpu measurements?

I think yes, because we actually do not know whether measuring on
non-cpu instances would work without some adjustments...

Best regards,
Krzysztof