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Date: Mon, 15 Apr 2024 22:00:05 +0200
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Subject: Re: [PATCH] arm/arm64: dts: Drop "arm,armv8-pmuv3" compatible usage
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
 Rob Herring <robh@kernel.org>
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From: Konrad Dybcio <konrad.dybcio@linaro.org>
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On 4/15/24 19:41, Dmitry Baryshkov wrote:
> On Mon, 15 Apr 2024 at 20:15, Rob Herring <robh@kernel.org> wrote:
>>
>> On Mon, Apr 15, 2024 at 12:05 PM Rob Herring <robh@kernel.org> wrote:
>>>
>>> On Mon, Apr 15, 2024 at 11:52 AM Dmitry Baryshkov
>>> <dmitry.baryshkov@linaro.org> wrote:
>>>>
>>>> On Mon, 15 Apr 2024 at 16:46, Bjorn Andersson <quic_bjorande@quicinc.com> wrote:
>>>>>
>>>>> On Fri, Apr 12, 2024 at 05:28:51PM -0500, Rob Herring wrote:
>>>>> [..]
>>>>>>   arch/arm64/boot/dts/qcom/qcm2290.dtsi                | 2 +-
>>>>>>   arch/arm64/boot/dts/qcom/qdu1000.dtsi                | 2 +-
>>>>>>   arch/arm64/boot/dts/qcom/sdm630.dtsi                 | 2 +-
>>>>>>   arch/arm64/boot/dts/qcom/sdx75.dtsi                  | 2 +-
>>>>>
>>>>> Acked-by: Bjorn Andersson <andersson@kernel.org>
>>>>
>>>> Note, we'd need to override PMU compatibles in sdm636.dtsi and
>>>> sdm660.dtsi. Ideally it should come as the same patch.
>>>
>>> Uh, that's an A for reuse, but an F for readability... It's sdm632 as
>>> well. Will drop sdm630.
>>
>> Actually, aren't those Kryo cores just Cortex-A53 derivatives? So the
>> A53 PMU compatible is an improvement over the generic one still. We
>> can't just add kryo260-pmu compatibles because that breaks
>> compatibility. We could have a fallback, but then that introduces a
>> pattern we don't want.
> 
> I think it is believed that Gold cores are A73-derivatives.

8xA53 on 630
4xA53+4xA73 on 636/660

Konrad