linux-kernel - Re: [PATCH v11 0/9] Add power domain driver for corners on msm8996/sdm845

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Date:   Fri, 18 Jan 2019 09:24:07 +0530
From:   Rajendra Nayak <rnayak@...eaurora.org>
To:     Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        MSM <linux-arm-msm@...r.kernel.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jeffrey Hugo <jhugo@...eaurora.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 0/9] Add power domain driver for corners on
 msm8996/sdm845



On 1/17/2019 8:33 PM, Marc Gonzalez wrote:
> On 10/01/2019 05:02, Rajendra Nayak wrote:
> 
>> Rajendra Nayak (9):
>>    dt-bindings: opp: Introduce opp-level bindings
>>    OPP: Add support for parsing the 'opp-level' property
>>    dt-bindings: power: Add qcom rpm power domain driver bindings
>>    soc: qcom: rpmpd: Add a Power domain driver to model corners
>>    soc: qcom: rpmpd: Add support for get/set performance state
>>    arm64: dts: msm8996: Add rpmpd device node
>>    soc: qcom: rpmhpd: Add RPMh power domain driver
>>    arm64: dts: sdm845: Add rpmh powercontroller node
>>    soc: qcom: rpmhpd: Mark mx as a parent for cx
>>
>>   Documentation/devicetree/bindings/opp/opp.txt |   3 +
>>   .../devicetree/bindings/power/qcom,rpmpd.txt  | 145 +++++++
>>   arch/arm64/boot/dts/qcom/msm8996.dtsi         |  34 ++
>>   arch/arm64/boot/dts/qcom/sdm845.dtsi          |  51 +++
> 
> Whenever I see these patches adding support for msm8996 (aka sdm820) and sdm845
> simultaneously, I think to myself: "Why is sdm835 being left out? It was released
> between sdm820 and sdm845, it cannot be /that/ different."

It isn't that different, and it should be quite straight forward to add support for it
with the rpmpd driver (the rpmhpd is for platforms sdm845 and beyond which use rpmh)

When I started working on these patches, support for sdm835 upstream was non-existent
so I started off with what was the better supported one which was the 820 (msm8996).

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