linux-kernel - Re: [PATCH 1/8] dt-bindings: qcom: rpmh-regulator: Add compatible for SA8155p-adp board pmics

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Message-ID: <CAH=2NtyV=qMn32d9nE7qBheTscUejF1UwVZSc99uiv_P65S03Q@mail.gmail.com>
Date:   Mon, 14 Jun 2021 13:35:48 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        bhupesh.linux@...il.com
Subject: Re: [PATCH 1/8] dt-bindings: qcom: rpmh-regulator: Add compatible for
 SA8155p-adp board pmics

Hello Bjorn,

Thanks for the review comments.

On Fri, 11 Jun 2021 at 08:18, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> On Mon 07 Jun 06:38 CDT 2021, Bhupesh Sharma wrote:
>
> > Add compatible strings for pmm8155au_1 and pmm8155au_2 pmics
> > found on SA8155p-adp board.
> >
> > Cc: Linus Walleij <linus.walleij@...aro.org>
> > Cc: Liam Girdwood <lgirdwood@...il.com>
> > Cc: Mark Brown <broonie@...nel.org>
> > Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Cc: Vinod Koul <vkoul@...nel.org>
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Cc: Andy Gross <agross@...nel.org>
> > Cc: devicetree@...r.kernel.org
> > Cc: linux-kernel@...r.kernel.org
> > Cc: linux-gpio@...r.kernel.org
> > Cc: bhupesh.linux@...il.com
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >  .../devicetree/bindings/regulator/qcom,rpmh-regulator.yaml      | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
> > index e561a5b941e4..ea5cd71aa0c7 100644
> > --- a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
> > +++ b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
> > @@ -55,6 +55,8 @@ properties:
> >        - qcom,pm8009-1-rpmh-regulators
> >        - qcom,pm8150-rpmh-regulators
> >        - qcom,pm8150l-rpmh-regulators
> > +      - qcom,pmm8155au-1-rpmh-regulators
> > +      - qcom,pmm8155au-2-rpmh-regulators
>
> Looking at the component documentation and the schematics I think the
> component is "PMM8155AU" and we have two of them.
>
> Unless I'm mistaken we should have the compatible describe the single
> component and we should have DT describe the fact that we have 2 of
> them.

If we refer to the PM8155AU device specifications, there are two
regulators mentioned there PMM8155AU_1 and PMM8155AU_2. Although most
parameters of the regulators seem similar the smps regulator summary
for both appear different (Transient Load, mA ratings etc).

Although most of these differences don't probably matter to the Linux
world, others like the gpios on the pmic are different.

So, IMO, it makes sense to mention the different pmic types on the board.

Please let me know your views on the same.

Thanks,
Bhupesh

>
> >        - qcom,pm8350-rpmh-regulators
> >        - qcom,pm8350c-rpmh-regulators
> >        - qcom,pm8998-rpmh-regulators
> > --
> > 2.31.1
> >