linux-kernel - Re: [PATCH 1/3] dt-bindings: mfd: qcom,spmi-pmic: Add pm8916 vm-bms and lbc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <27adb905b990398989b4c13f03339ae9@trvn.ru>
Date:   Sun, 17 Sep 2023 13:54:39 +0500
From:   Nikita Travkin <nikita@...n.ru>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     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>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 1/3] dt-bindings: mfd: qcom,spmi-pmic: Add pm8916 vm-bms
 and lbc

Krzysztof Kozlowski писал(а) 17.09.2023 13:32:
> On 17/09/2023 10:26, Nikita Travkin wrote:
>> Krzysztof Kozlowski писал(а) 17.09.2023 12:58:
>>> On 16/09/2023 15:57, Nikita Travkin wrote:
>>>> PM8916 (and probably some other similar pmics) have hardware blocks for
>>>> battery monitoring and charging. Add patterns for respecive nodes so the
>>>
>>> typo: respective
>>>
>>
>> Oops, will fix if we get to v2.
>>
>>>> dt for those blocks can be validated properly.
>>>>
>>>> Signed-off-by: Nikita Travkin <nikita@...n.ru>
>>>> ---
>>>> Schemas for those devices were added in [1].
>>>
>>> "Dependency"
>>>
>>
>> You are right, will try to word it better next time.
>>
>>>>
>>>> [1] https://lore.kernel.org/r/20230915-pm8916-bms-lbc-v3-0-f30881e951a0@trvn.ru
>>>> ---
>>>>  Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml | 6 ++++++
>>>>  1 file changed, 6 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>>>> index 9f03436b1cdc..8bcd76748faa 100644
>>>> --- a/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>>>> +++ b/Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml
>>>> @@ -133,9 +133,15 @@ patternProperties:
>>>>      type: object
>>>>      $ref: /schemas/sound/qcom,pm8916-wcd-analog-codec.yaml#
>>>>
>>>> +  "^battery@[0-9a-f]+$":
>>>> +    type: object
>>>> +    oneOf:
>>>> +      - $ref: /schemas/power/supply/qcom,pm8916-bms-vm.yaml#
>>>
>>> That's just ref, so no need for oneOf... unless you already think this
>>> will grow with different schemas like the charger below?
>>>
>>
>> Yes, I think some other PMICs have different battery/fuel-gauge
>> blocks too so I'd like to have some room for expansion here.
> 
> There is always room. Which other device will have different battery
> charger?
> 

I know of non-"VM" BMS block in PM8226. It's used on some Nokia
devices that people were working on so I expect it to appear in
the future.

There is also some BMS block in more modern PM6150 that I've
seen being looked at by people interested in bringing sm7125
phones upstream.

Both of those, to my knowledge, are completely different from
this VM-BMS block, which I believe was present in the generation
of pm8916, pm8909 and was abandoned again shortly after...

Nikita

> Best regards,
> Krzysztof