linux-kernel - Re: [PATCH v12 1/7] dt-bindings: sun6i-dsi: Document A64 MIPI-DSI controller

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Message-ID: <CAMty3ZDU57Hj3ZSBC6sSMFWN9-HQadA03hmXUNUVS1W0UQQ3DA@mail.gmail.com>
Date:   Mon, 16 Dec 2019 16:37:20 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Icenowy Zheng <icenowy@...c.io>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-amarula <linux-amarula@...rulasolutions.com>
Subject: Re: [PATCH v12 1/7] dt-bindings: sun6i-dsi: Document A64 MIPI-DSI controller

On Wed, Dec 4, 2019 at 7:06 PM Maxime Ripard <mripard@...nel.org> wrote:
>
> On Tue, Dec 03, 2019 at 07:18:10PM +0530, Jagan Teki wrote:
> > The MIPI DSI controller in Allwinner A64 is similar to A33.
> >
> > But unlike A33, A64 doesn't have DSI_SCLK gating so it is valid
> > to have separate compatible for A64 on the same driver.
> >
> > DSI_SCLK uses mod clock-names on dt-bindings, so the same
> > is not required for A64.
> >
> > On that note
> > - A64 require minimum of 1 clock like the bus clock
> > - A33 require minimum of 2 clocks like both bus, mod clocks
> >
> > So, update dt-bindings so-that it can document both A33,
> > A64 bindings requirements.
> >
> > Reviewed-by: Rob Herring <robh@...nel.org>
> > Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> > ---
> > Changes for v12:
> > - Use 'enum' instead of oneOf+const
> >
> >  .../display/allwinner,sun6i-a31-mipi-dsi.yaml | 20 +++++++++++++++++--
> >  1 file changed, 18 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml b/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
> > index dafc0980c4fa..b91446475f35 100644
> > --- a/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
> > +++ b/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
> > @@ -15,7 +15,9 @@ properties:
> >    "#size-cells": true
> >
> >    compatible:
> > -    const: allwinner,sun6i-a31-mipi-dsi
> > +    enum:
> > +      - allwinner,sun6i-a31-mipi-dsi
> > +      - allwinner,sun50i-a64-mipi-dsi
> >
> >    reg:
> >      maxItems: 1
> > @@ -24,6 +26,8 @@ properties:
> >      maxItems: 1
> >
> >    clocks:
> > +    minItems: 1
> > +    maxItems: 2
> >      items:
> >        - description: Bus Clock
> >        - description: Module Clock
> > @@ -63,13 +67,25 @@ required:
> >    - reg
> >    - interrupts
> >    - clocks
> > -  - clock-names
> >    - phys
> >    - phy-names
> >    - resets
> >    - vcc-dsi-supply
> >    - port
> >
> > +allOf:
> > +  - if:
> > +      properties:
> > +         compatible:
> > +           contains:
> > +             const: allwinner,sun6i-a31-mipi-dsi
> > +      then:
> > +        properties:
> > +          clocks:
> > +            minItems: 2
> > +        required:
> > +          - clock-names
> > +
>
> Your else condition should check that the number of clocks items is 1
> on the A64

But the minItems mentioned as 1 in clocks, which is unchanged number
by default. doesn't it sufficient?