linux-kernel - Re: [RESEND v12 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties

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Message-ID: <CAPDyKFp1ibzg2FO9m_m9quqPRew9jOtLJRSF80VTi0cesjhBqw@mail.gmail.com>
Date:   Tue, 7 Jun 2022 11:26:31 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Axe Yang <axe.yang@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Satya Tangirala <satyat@...gle.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Lucas Stach <dev@...xeye.de>,
        Eric Biggers <ebiggers@...gle.com>,
        Andrew Jeffery <andrew@...id.au>,
        Stephen Boyd <swboyd@...omium.org>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        Yue Hu <huyue2@...ong.com>, Tian Tao <tiantao6@...ilicon.com>,
        angelogioacchino.delregno@...labora.com, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [RESEND v12 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and
 pinctrls properties

On Tue, 7 Jun 2022 at 10:24, Axe Yang <axe.yang@...iatek.com> wrote:
>
> On Fri, 2022-06-03 at 09:28 +0200, Ulf Hansson wrote:
> > On Wed, 25 May 2022 at 03:51, Axe Yang <axe.yang@...iatek.com> wrote:
> > >
> > > Extend interrupts and pinctrls for SDIO wakeup interrupt feature.
> > > This feature allow SDIO devices alarm asynchronous interrupt to
> > > host
> > > even when host stop providing clock to SDIO card. An extra wakeup
> > > interrupt and pinctrl states for SDIO DAT1 pin state switching are
> > > required in this scenario.
> > >
> > > Reviewed-by: AngeloGioacchino Del Regno <
> > > angelogioacchino.delregno@...labora.com>
> > > Signed-off-by: Axe Yang <axe.yang@...iatek.com>
> > > ---
> > >  .../devicetree/bindings/mmc/mtk-sd.yaml       | 50
> > > ++++++++++++++++++-
> > >  1 file changed, 49 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > > b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > > index 2a2e9fa8c188..e83bf10281d6 100644
> > > --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > > +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > > @@ -72,12 +72,27 @@ properties:
> > >        - const: ahb_cg
> > >
> > >    interrupts:
> > > -    maxItems: 1
> > > +    description:
> > > +      Should at least contain MSDC GIC interrupt. To support SDIO
> > > in-band wakeup, an extended
> > > +      interrupt is required and be configured as wakeup source
> > > irq.
> > > +    minItems: 1
> > > +    maxItems: 2
> > > +
> > > +  interrupt-names:
> > > +    items:
> > > +      - const: msdc
> > > +      - const: sdio_wakeup
> > >
> > >    pinctrl-names:
> > > +    description:
> > > +      Should at least contain default and state_uhs. To support
> > > SDIO in-band wakeup, dat1 pin
> > > +      will be switched between GPIO mode and SDIO DAT1 mode,
> > > state_eint and state_dat1 are
> > > +      mandatory in this scenarios.
> > > +    minItems: 2
> > >      items:
> > >        - const: default
> > >        - const: state_uhs
> > > +      - const: state_eint
> >
> > Don't you need something along the lines of the below instead? I mean
> > the "state_eint" isn't always needed, right?
> >
> > oneOf:
> >   - items:
> >       - const: default
> >       - const: state_uhs
> >     - items:
> >         - const: default
> >         - const: state_uhs
> >         - const: state_eint
> >
> No, it is not always needed.
> As Rob said, the 'minItems: 2' makes the 3rd item optional.
> Combine 'minItems' and 'description' fields, it is easy for others to
> understand how to set pinctrl related properities.

Yes, I agree.

>
> Anyway, If you insist 'oneOf' is the better way, I can update that in
> next version. What do you think?

I am fine with it as is, sorry for the noise.

>
> And thanks to your comment, I found a mistake in 'description', I
> should remove descriptions related to 'state_dat1', and I will update
> that in next version.

Okay.

>
> And do you have any comment on patch 2/3 and 3/3?

Sorry for the delay, I will have a look asap.

>
>
> Regards,
> Axe
>
>

Kind regards
Uffe