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From:   Alistair Francis <alistair23@gmail.com>
Date:   Tue, 19 Jan 2021 22:15:53 -0800
Message-ID: <CAKmqyKPMXxLOGj4BH_fYx4hjZ+pHO3LNQVtN1buFrSAom38j1g@mail.gmail.com>
Subject: Re: [PATCH 1/3] devicetree/bindings: Initial commit of wacom,wacom-i2c
To:     Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc:     Alistair Francis <alistair@alistair23.me>,
        linux-input@vger.kernel.org, dl-linux-imx <linux-imx@nxp.com>,
        Sascha Hauer <kernel@pengutronix.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, Jan 19, 2021 at 6:15 PM Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
>
> Hi Alistair,
>
> On Sat, Jan 16, 2021 at 08:24:26PM -0800, Alistair Francis wrote:
> > Signed-off-by: Alistair Francis <alistair@alistair23.me>
> > ---
> >  .../input/touchscreen/wacom,wacom-i2c.yaml    | 55 +++++++++++++++++++
> >  .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
> >  2 files changed, 57 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
> > new file mode 100644
> > index 000000000000..6b0e0034f836
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/wacom,wacom-i2c.yaml
> > @@ -0,0 +1,55 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/input/touchscreen/wacom,wacom-i2c.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Wacom I2C Controller
> > +
> > +maintainers:
> > +  - Alistair Francis <alistair@alistair23.me>
> > +
> > +allOf:
> > +  - $ref: touchscreen.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: wacom,wacom-i2c
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  flip-tilt-x:
> > +  flip-tilt-y:
>
> Does the device support tilt? The driver does not, at least at the
> moment. Also, does it make sense to flip tilt but not position?
>
> > +  flip-pos-x:
> > +  flip-pos-y:
>
> This needs to use standard touchscreen properties. See
> Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml
>
> > +  flip-distance:
>
> I am having trouble understanding when this one would be useful.

Thanks for the review. These came from the original out of tree DT. I
have removed them, I'm planning on using the standard touchscreen ones
you pointed out if they are required.

Alistair

>
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include "dt-bindings/interrupt-controller/irq.h"
> > +    i2c {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +        digitiser@9 {
> > +                compatible = "wacom,wacom-i2c";
> > +                reg = <0x9>;
> > +                interrupt-parent = <&gpio1>;
> > +                interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
> > +                flip-tilt-x;
> > +                flip-tilt-y;
> > +                flip-pos-x;
> > +                flip-pos-y;
> > +                flip-distance;
> > +        };
> > +    };
> > diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> > index 041ae90b0d8f..5bca22f035a3 100644
> > --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> > +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> > @@ -1202,6 +1202,8 @@ patternProperties:
> >      description: Vision Optical Technology Co., Ltd.
> >    "^vxt,.*":
> >      description: VXT Ltd
> > +  "^wacom,.*":
> > +    description: Wacom Co., Ltd
> >    "^wand,.*":
> >      description: Wandbord (Technexion)
> >    "^waveshare,.*":
> > --
> > 2.29.2
> >
>
> Thanks.
>
> --
> Dmitry