linux-kernel - Re: [PATCH v3 1/4] arm64: dts: qcom: ipq6018: add 1.2GHz CPU Frequency

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Message-ID: <743ce426-3473-49db-92c3-45b9057ce0a6@oss.qualcomm.com>
Date: Thu, 31 Oct 2024 21:53:14 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Chukun Pan <amadeus@....edu.cn>, dmitry.baryshkov@...aro.org
Cc: andersson@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org,
        konradybcio@...nel.org, krzk+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        robh@...nel.org
Subject: Re: [PATCH v3 1/4] arm64: dts: qcom: ipq6018: add 1.2GHz CPU
 Frequency

On 30.10.2024 2:30 PM, Chukun Pan wrote:
> Hi,
>> You can respond here and post new iteration once we settle on something.
> 
> Sorry for the late reply. There are two versions of ipq6000 SoCs:
> (1) Earlier version: soc_id: IPQ6018; fuse: BIT(1); SBL version: BOOT.XF.0.3-00077-IPQ60xxLZB-2
> (2) Final   version: soc_id: IPQ6000; fuse: BIT(1); SBL version: BOOT.XF.0.3-00086-IPQ60xxLZB-1
> 
> The soc_id is related to the sbl version, but it is written by the
> manufacturer. On the qsdk kernel, early version could reach 1.5GHz,
> while the final version was limited to 1.2GHz.
> 
> So I think the commit message can be written like below:
> 
>     arm64: dts: qcom: ipq6018: add 1.2GHz CPU Frequency
> 
>         The final version of IPQ6000 (soc id: IPQ6000, SBL version:
>         BOOT.XF.0.3-00086-IPQ60xxLZB-1) has a max design frequency
>         of 1.2GHz, so add this CPU frequency.
> 
> 
>     arm64: dts: qcom: ipq6018: add 1.5GHz CPU Frequency
> 
>         The early version of IPQ6000 (soc id: IPQ6018, SBL version:
>         BOOT.XF.0.3-00086-IPQ60xxLZB-1) and IPQ6005 SoCs can reach
>         a max frequency of 1.5GHz, so add this CPU frequency.

Are these earlier versions valid SKUs, or are they something like
engineering samples / early versions that were internal to Qualcomm?

Konrad