linux-kernel - Re: [PATCHv4 1/4] arm64: dts: qcom: sdm845: Add Coresight support

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Message-ID: <eec64938-ef6a-a3d5-d93f-7a63df8b132f@codeaurora.org>
Date:   Tue, 29 Jan 2019 00:47:50 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     Suzuki K Poulose <suzuki.poulose@....com>,
        Rob Herring <robh+dt@...nel.org>, Leo Yan <leo.yan@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Doug Anderson <dianders@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        devicetree@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        John Horley <John.Horley@....com>
Subject: Re: [PATCHv4 1/4] arm64: dts: qcom: sdm845: Add Coresight support

On 1/28/2019 10:45 PM, Mathieu Poirier wrote:

>> For SDM845(A75 based):
>>
>> *0xB_B8_03* does indicate that the JEP106 identification
>> code is 0x3B and continuation code is 0x4 which is of ARM and not
>> QCOM(JEP106 ID is 0x70) which is expected.
>>
>> And the other values of PIDR0[0:7] and PIDR1[3:0] are *Implementation
>> defined part numbers* and can be different from ARM A75/A55.
>>
>> I think this clears up case for SDM845.
>>
>> As for MSM8996, it is not based on any ARM derivative and hence the
>> JEP106 ID is of QCOM(0x70) from the value of pid = *0xF_02_11*
>> based on PIDR1[7:4] and PIDR2[2:0]. This clears this as well.
>>
>> Please correct me if I am wrong and also let me know if I can
>> continue with PID addition to table.
> 
> Please proceed.
> 

Thanks Mathieu, posted the next version now.

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