linux-kernel - Re: [PATCH v3 01/24] dt-bindings: iommu: mediatek: Convert IOMMU to DT schema

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Date:   Tue, 13 Oct 2020 15:53:09 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
CC:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Will Deacon <will@...nel.org>,
        Evan Green <evgreen@...omium.org>,
        Tomasz Figa <tfiga@...gle.com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <youlin.pei@...iatek.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        <anan.sun@...iatek.com>, <chao.hao@...iatek.com>,
        <ming-fan.chen@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...gle.com>,
        <kernel-team@...roid.com>
Subject: Re: [PATCH v3 01/24] dt-bindings: iommu: mediatek: Convert IOMMU to
 DT schema

On Mon, 2020-10-12 at 19:08 +0200, Krzysztof Kozlowski wrote:
> On Tue, 6 Oct 2020 at 06:27, Yong Wu <yong.wu@...iatek.com> wrote:
> >
> > On Fri, 2020-10-02 at 13:07 +0200, Krzysztof Kozlowski wrote:
> > > On Wed, Sep 30, 2020 at 03:06:24PM +0800, Yong Wu wrote:
> > > > Convert MediaTek IOMMU to DT schema.
> > > >
> > > > Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> > > > ---
> > > >  .../bindings/iommu/mediatek,iommu.txt         | 103 ------------
> > > >  .../bindings/iommu/mediatek,iommu.yaml        | 154 ++++++++++++++++++
> > > >  2 files changed, 154 insertions(+), 103 deletions(-)
> > > >  delete mode 100644 Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> > > >  create mode 100644 Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
> > > >
> >
> > [...]
> >
> > > > +properties:
> > > > +  compatible:
> > > > +    oneOf:
> > > > +      - enum:
> > > > +          - mediatek,mt2701-m4u # mt2701 generation one HW
> > > > +          - mediatek,mt2712-m4u # mt2712 generation two HW
> > > > +          - mediatek,mt6779-m4u # mt6779 generation two HW
> > > > +          - mediatek,mt8173-m4u # mt8173 generation two HW
> > > > +          - mediatek,mt8183-m4u # mt8183 generation two HW
> > > > +
> > > > +      - description: mt7623 generation one HW
> > > > +        items:
> > > > +          - const: mediatek,mt7623-m4u
> > > > +          - const: mediatek,mt2701-m4u
> > > > +
> > > > +  reg:
> > > > +    maxItems: 1
> > > > +
> > > > +  interrupts:
> > > > +    maxItems: 1
> > > > +
> > > > +  clocks:
> > > > +    description: |
> > > > +      bclk is optional. here is the list which require this bclk:
> > > > +      mt2701, mt2712, mt7623 and mt8173.
> > >
> > > Similarly to my comment in other patch, this should be part of schema
> > > within 'if-then'.
> >
> > Thanks for the review.
> >
> > I will change like this:
> >
> > =============
> >   clocks:
> >     items:
> >       - description: bclk is the block clock.
> >
> >   clock-names:
> >     items:
> >       - const: bclk
> >
> > required:
> >   - compatible
> >   - reg
> >   - interrupts
> >   - mediatek,larbs
> >   - '#iommu-cells'
> > if:
> >   properties:
> >     compatible:
> >       contains:
> >         enum:
> >           - mediatek,mt2701-m4u
> >           - mediatek,mt2712-m4u
> >           - mediatek,mt8173-m4u
> >
> > then:
> >  required:
> >    - clocks
> > ==============
> >
> > If this is not right, please tell me.
> > (dt_binding_check is ok.)
> 
> Looks fine, except "if" should be part of some "allOf" block.

Thanks very much for the review.
I will add "allOf" in next version.

> 
> Best regards,
> Krzysztof