linux-kernel - Re: [PATCH 04/11] arm64: dts: qcom: pm7250b: make SID configurable

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Message-ID: <cae7261a-6727-6163-1420-01039bfb8396@linaro.org>
Date:   Mon, 11 Sep 2023 11:44:42 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Luca Weiss <luca.weiss@...rphone.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     cros-qcom-dts-watchers@...omium.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH 04/11] arm64: dts: qcom: pm7250b: make SID configurable

On 11/09/2023 10:34, Luca Weiss wrote:
> On Tue Sep 5, 2023 at 10:30 AM CEST, Luca Weiss wrote:
>> On Thu Aug 31, 2023 at 2:27 PM CEST, Dmitry Baryshkov wrote:
>>> On Thu, 31 Aug 2023 at 14:54, Krzysztof Kozlowski
>>> <krzysztof.kozlowski@...aro.org> wrote:
>>>>
>>>> On 31/08/2023 13:33, Dmitry Baryshkov wrote:
>>>>> On Thu, 31 Aug 2023 at 13:13, Luca Weiss <luca.weiss@...rphone.com> wrote:
>>>>>>
>>>>>> On Wed Aug 30, 2023 at 12:06 PM CEST, Krzysztof Kozlowski wrote:
>>>>>>> On 30/08/2023 11:58, Luca Weiss wrote:
>>>>>>>> Like other Qualcomm PMICs the PM7250B can be used on different addresses
>>>>>>>> on the SPMI bus. Use similar defines like the PMK8350 to make this
>>>>>>>> possible.
>>>>>>>>
>>>>>>>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>>>>>>>> ---
>>>>>>>>  arch/arm64/boot/dts/qcom/pm7250b.dtsi | 23 ++++++++++++++++-------
>>>>>>>>  1 file changed, 16 insertions(+), 7 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/arch/arm64/boot/dts/qcom/pm7250b.dtsi b/arch/arm64/boot/dts/qcom/pm7250b.dtsi
>>>>>>>> index e8540c36bd99..3514de536baa 100644
>>>>>>>> --- a/arch/arm64/boot/dts/qcom/pm7250b.dtsi
>>>>>>>> +++ b/arch/arm64/boot/dts/qcom/pm7250b.dtsi
>>>>>>>> @@ -7,6 +7,15 @@
>>>>>>>>  #include <dt-bindings/interrupt-controller/irq.h>
>>>>>>>>  #include <dt-bindings/spmi/spmi.h>
>>>>>>>>
>>>>>>>> +/* This PMIC can be configured to be at different SIDs */
>>>>>>>> +#ifndef PM7250B_SID
>>>>>>>> +   #define PM7250B_SID 2
>>>>>>>> +#endif
>>>>>>>
>>>>>>> Why do you send the same patch as v1, without any reference to previous
>>>>>>> discussions?
>>>>>>>
>>>>>>> You got here feedback already.
>>>>>>>
>>>>>>> https://lore.kernel.org/linux-arm-msm/f52524da-719b-790f-ad2c-0c3f313d9fe9@linaro.org/
>>>>>>
>>>>>> Hi Krzysztof,
>>>>>>
>>>>>> I did mention that original patch in the cover letter of this series.
>>>>>> I'm definitely aware of the discussion earlier this year there but also
>>>>>> tried to get an update lately if there's any update with no response.
>>>>>
>>>>> I think the overall consensus was that my proposal is too complicated
>>>>> for the DT files.
>>>>
>>>> I proposed to duplicate the entries. Do you keep QUP nodes in DTSI and
>>>> customize per address? No.
>>>
>>> At the same time, we do keep SoC files separate from the board files.
>>> Yes, I'm slightly exaggerating here.
>>>
>>> I think that for PMIC files it makes sense to extract common parts if
>>> that eases reuse of the common parts.
>>
>> Hi all,
>>
>> what can I do for v2 now?
>>
>> 1. Keep this patch as-is, and keep pm7250b in device dts.

This was NAKed by me. What Qualcomm SoC maintainers decide (or not
decide) about other options, should not cause the wrong solution to be
re-posted...

>>
>> 2. Drop pm7250b patch and drop from device dts, until _someone_ figures
>> out a solution talking to the PMIC on different SID.
>>
>> 3. Something else like copy-pasting pm7250b.dtsi to pm7250-8.dtsi and
>> changing the SID there, and using that in device dts.
>>
>> Please let me know what to do.
>>
>> Regards
>> Luca
> 
> Hi,
> 
> if there's no feedback I'll keep this patch in v2 of this series and we
> can continue to discuss there (if necessary).

Sorry, I still do not agree and there were no arguments convincing me to
change the mind.

I gave you the solution from my perspective. Why do you decided to
ignore it and send it as is?


Best regards,
Krzysztof