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

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Message-ID: <392710d8-3e3d-4987-e0be-a5098da852ab@codeaurora.org>
Date:   Mon, 21 Jan 2019 14:50:47 +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 1/18/2019 3:47 PM, Marc Gonzalez wrote:
> On 18/01/2019 04:54, Rajendra Nayak wrote:
> 
>> 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).
> 
> Once you land this patch series, could you take a quick look at how much work is needed
> to add msm8998 support? I'm betting it would take you only a few hours.

Sure, I can take a look. I think I do have a 8998 device which I can probably do
some testing on too.

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