linux-kernel - Re: [PATCH 2/8] dt-bindings: pinctrl: qcom,pmic-gpio: Add compatible for SA8155p-adp

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Date:   Mon, 14 Jun 2021 13:43:31 +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 2/8] dt-bindings: pinctrl: qcom,pmic-gpio: Add compatible
 for SA8155p-adp

Hi Bjorn,

On Fri, 11 Jun 2021 at 08:21, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> On Mon 07 Jun 06:38 CDT 2021, Bhupesh Sharma wrote:
>
> > Add pmic-gpio 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>
> > ---
> >  Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt
> > index f6a9760558a6..ee4721f1c477 100644
> > --- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt
> > +++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt
> > @@ -27,6 +27,8 @@ PMIC's from Qualcomm.
> >                   "qcom,pm660l-gpio"
> >                   "qcom,pm8150-gpio"
> >                   "qcom,pm8150b-gpio"
> > +                 "qcom,pmm8155au-1-gpio"
> > +                 "qcom,pmm8155au-2-gpio"
>
> As with the regulator this seems to be a single component.
>
> >                   "qcom,pm8350-gpio"
> >                   "qcom,pm8350b-gpio"
> >                   "qcom,pm8350c-gpio"
> > @@ -116,6 +118,9 @@ to specify in a pin configuration subnode:
> >                                            and gpio8)
> >                   gpio1-gpio12 for pm8150b (holes on gpio3, gpio4, gpio7)
> >                   gpio1-gpio12 for pm8150l (hole on gpio7)
> > +                 gpio1-gpio10 for pmm8155au-1 (holes on gpio2, gpio5, gpio7
> > +                                               and gpio8)
> > +                 gpio1-gpio10 for pmm8155au-2 (holes on gpio2, gpio5, gpio7)
>
> In the schematics all 10 pins are wired on both of these PMICs, so I
> don't think there are holes. Please omit the comment.

But if we look at the downstream dts (see [1]), we clearly have holes
on gpio 2, 5 and 7 on PMM8155AU_2 whereas if we see [2], we can see
PMM8155AU_1 has holes on gpio 2, 5, 7 and 8.

As I understand, the schematics mention some optional configurations
as well which might not be available depending on the default board
configuration.

[1]. https://source.codeaurora.org/quic/la/kernel/msm-4.14/tree/arch/arm64/boot/dts/qcom/sa8155-pmic-overlay.dtsi?h=LV.AU.0.1.0.r1-15900-gen3meta.0#n92
[2]. https://source.codeaurora.org/quic/la/kernel/msm-4.14/tree/arch/arm64/boot/dts/qcom/sa8155-pmic-overlay.dtsi?h=LV.AU.0.1.0.r1-15900-gen3meta.0#n36

Regards,
Bhupesh

>
> >                   gpio1-gpio10 for pm8350
> >                   gpio1-gpio8 for pm8350b
> >                   gpio1-gpio9 for pm8350c
> > --
> > 2.31.1
> >