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

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Message-ID: <20220603140258.GB243231-robh@kernel.org>
Date:   Fri, 3 Jun 2022 09:02:58 -0500
From:   Rob Herring <robh@...nel.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Axe Yang <axe.yang@...iatek.com>,
        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 Fri, Jun 03, 2022 at 09:28:37AM +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

This is equivalent to what was done. The 'minItems: 2' makes the 3rd 
item optional.

Rob