linux-kernel - Re: [PATCH 3/9] dt-bindings: crypto: Add DT bindings documentation for sun8i-ce Crypto Engine

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Date:   Thu, 12 Sep 2019 21:26:27 +0100
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>,
        David Miller <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Russell King <linux@...linux.org.uk>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-crypto@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH 3/9] dt-bindings: crypto: Add DT bindings documentation
 for sun8i-ce Crypto Engine

On Thu, Sep 12, 2019 at 10:37 AM Maxime Ripard <mripard@...nel.org> wrote:
>
> Hi Corentin,
>
> On Wed, Sep 11, 2019 at 08:31:58PM +0200, Corentin Labbe wrote:
> > On Sat, Sep 07, 2019 at 07:01:16AM +0300, Maxime Ripard wrote:
> > > On Fri, Sep 06, 2019 at 08:45:45PM +0200, Corentin Labbe wrote:
> > > > This patch adds documentation for Device-Tree bindings for the
> > > > Crypto Engine cryptographic accelerator driver.
> > > >
> > > > Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
> > > > ---
> > > >  .../bindings/crypto/allwinner,sun8i-ce.yaml   | 84 +++++++++++++++++++
> > > >  1 file changed, 84 insertions(+)
> > > >  create mode 100644 Documentation/devicetree/bindings/crypto/allwinner,sun8i-ce.yaml
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/crypto/allwinner,sun8i-ce.yaml b/Documentation/devicetree/bindings/crypto/allwinner,sun8i-ce.yaml
> > [...]
> > > > +else:
> > > > +  clocks:
> > > > +    items:
> > > > +      - description: Bus clock
> > > > +      - description: Module clock
> > > > +
> > > > +  clock-names:
> > > > +    items:
> > > > +      - const: ahb
> > > > +      - const: mod
> > > > +
> > > > +  resets:
> > > > +    maxItems: 1
> > > > +
> > > > +  reset-names:
> > > > +    const: ahb
> > >
> > > This prevents the usage of the additionalProperties property, which
> > > you should really use.
> > >
> > > What you can do instead is moving the clocks and clock-names
> > > description under properties, with a minItems of 2 and a maxItems of
> > > 3. Then you can restrict the length of that property to either 2 or 3
> > > depending on the case here.
> > >
> >
> > Hello
> >
> > I fail to do this.
> > I do the following (keeped only clock stuff)
> > properties:
> >
> >   clocks:
> >     items:
> >       - description: Bus clock
> >       - description: Module clock
> >       - description: MBus clock
>
> Add minItems: 2  and maxItems: 3 at the same level than items
>
> >
> >   clock-names:
> >     items:
> >       - const: ahb
> >       - const: mod
> >       - const: mbus
>
> And here as well
>
> Something I missed earlier though was that we've tried to unify as
> much as possible the ahb / apb / axi clocks around the bus name, it
> would be great if you could do it.

I think we also want to standardize "mbus" as "dram"?

ChenYu

> >
> > if:
> >   properties:
> >     compatible:
> >       items:
> >         const: allwinner,sun50i-h6-crypto
> > then:
> >   properties:
> >       clocks:
> >         minItems: 3
> >         maxItems: 3
> >       clock-names:
> >         minItems: 3
> >         maxItems: 3
>
> You don't need to duplicate the min and maxItems here
>
> Maxime