linux-kernel - Re: [PATCH v12 2/3] dt-bindings: mmc: mtk-sd: increase reg maxItems

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Date:   Tue, 29 Mar 2022 14:10:50 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Tinghan Shen <tinghan.shen@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Wenbin Mei <wenbin.mei@...iatek.com>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Ryder Lee <ryder.lee@...nel.org>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>
Subject: Re: [PATCH v12 2/3] dt-bindings: mmc: mtk-sd: increase reg maxItems

On Tue, Mar 29, 2022 at 7:43 AM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Il 29/03/22 13:45, Tinghan Shen ha scritto:
> > Add optional host top register base for the reg binding description.
> >
> > Signed-off-by: Wenbin Mei <wenbin.mei@...iatek.com>
> > Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> > ---
> >   Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 3 ++-
> >   1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > index 7032f7adf3ca..6d41bcec900f 100644
> > --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> > @@ -40,7 +40,8 @@ properties:
> >             - const: mediatek,mt8183-mmc
> >
> >     reg:
> > -    maxItems: 1
> > +    minItems: 1
> > +    maxItems: 2
>
> it's just maxItems... adding minItems: 1 is not required.

If 1 entry is still valid, then minItems is required. If not, then
it's an ABI break.

Rob