linux-kernel - Re: [PATCH 4/4] regulator: qcom-rpmh: add support for pm7550 regulators

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Message-ID: <c1a48230-c4f5-4c04-a53a-449bd90b1fd8@oss.qualcomm.com>
Date: Thu, 10 Jul 2025 15:03:03 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Luca Weiss <luca.weiss@...rphone.com>,
        Liam Girdwood
 <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 4/4] regulator: qcom-rpmh: add support for pm7550
 regulators

On 7/9/25 1:56 PM, Luca Weiss wrote:
> On Wed Jun 25, 2025 at 4:20 PM CEST, Konrad Dybcio wrote:
>> On 6/25/25 4:10 PM, Konrad Dybcio wrote:
>>> On 6/25/25 11:18 AM, Luca Weiss wrote:
>>>> Add RPMH regulators exposed by Qualcomm Technologies, Inc. PM7550 PMIC.
>>>> It has 6 FTS525 (FT-SMPS) and 23 LDOs with 3 different types.
>>>> L1-L11 are LDO515 LV NMOS, L12-L13 are LDO515 MV PMOS, L14-L23 are
>>>> LDO512 MV PMOS.
>>>>
>>>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>>>> ---
>>>
>>> FWIW everything you said in the commit message is correct, but I'm not
>>> 100% sure how to map these LDO types to the existing definitions
>>
>> OK so found another page (also made sure that the supply maps are
>> indeed OK)
>>
>> SMPS is OK
>> L1-L11 is OK
>> L14-23 is OK
>>
>> L12/13 -> pmic5_pldo515_mv
> 
> Based on what are you saying that?
> 
> Based on 80-62408-1 Rev. AG for the LDO515, the Output voltage range for
> MV PMOS is "programmable range 1.504-3.544" which matches "pmic5_pldo".
> 
> But yes, in the table next to it, it's saying 1.8-3.3V, which matches
> "pmic5_pldo515_mv".
> 
> If you're sure, I can update it but the datasheet is a bit confusing.
> Let me know!

I was looking at the same datasheet as you and took into account both
the LDO type from e.g. Table 3-12 and the output ranges from Table 3-24

Konrad