linux-kernel - Re: [PATCH v3 1/8] dt-bindings: arm: Add support for CMB element size

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Message-ID: <270d759f-74b3-42f0-96ec-f97bee7116b8@linaro.org>
Date:   Tue, 21 Nov 2023 08:24:05 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Tao Zhang <quic_taozha@...cinc.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Konrad Dybcio <konradybcio@...il.com>,
        Mike Leach <mike.leach@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Jinlong Mao <quic_jinlmao@...cinc.com>,
        Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Song Chai <quic_songchai@...cinc.com>,
        linux-arm-msm@...r.kernel.org, andersson@...nel.org
Subject: Re: [PATCH v3 1/8] dt-bindings: arm: Add support for CMB element size

On 21/11/2023 03:24, Tao Zhang wrote:
> Add property "qcom,cmb-elem-size" to support CMB(Continuous
> Multi-Bit) element for TPDM. The associated aggregator will read
> this size before it is enabled. CMB element size currently only
> supports 32-bit and 64-bit.


>    qcom,dsb-msrs-num:
>      description:
>        Specifies the number of DSB(Discrete Single Bit) MSR(mux select register)
> @@ -110,4 +119,23 @@ examples:
>        };
>      };
>  
> +    tpdm@...9000 {
> +      compatible = "qcom,coresight-tpdm", "arm,primecell";
> +      reg = <0x06c29000 0x1000>;
> +      reg-names = "tpdm-base";
> +
> +      qcom,cmb-element-size = /bits/ 8 <64>;

One new property usually does not justify new example. Why it cannot be
added to existing example?

Anyway, I prefer not to take any new Qualcomm Coresight bindings or
Qualcomm SoC DTS nodes with Coresight till we fix all existing warnings.
I don't know how to fix them, so I need help with them. No such fixing
happened so far from Qcom, so pushback is my only way to get any attention.

I already commented on this in other email thread.

Best regards,
Krzysztof