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Message-ID: <CAL_JsqKmyEn5iXuibmZGcvRpaiyUjVoi4-2e9NKY9eYnWLL7iQ@mail.gmail.com>
Date:   Tue, 20 Aug 2019 11:07:49 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Rahul Tanwar <rahul.tanwar@...ux.intel.com>
Cc:     devicetree@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        qi-ming.wu@...el.com, cheol.yong.kim@...el.com,
        rahul.tanwar@...el.com
Subject: Re: [PATCH v2 1/2] dt-bindings: serial: lantiq: Convert to YAML schema

On Tue, Aug 20, 2019 at 3:29 AM Rahul Tanwar
<rahul.tanwar@...ux.intel.com> wrote:
>
> Convert the existing DT binding document for Lantiq SoC ASC serial controller
> from txt format to YAML format.
>
> Signed-off-by: Rahul Tanwar <rahul.tanwar@...ux.intel.com>
> ---
>  .../devicetree/bindings/serial/lantiq_asc.txt      | 31 ----------
>  .../devicetree/bindings/serial/lantiq_asc.yaml     | 70 ++++++++++++++++++++++

Use the compatible name: lantiq,asc.yaml

Don't forget the $id value too.

>  2 files changed, 70 insertions(+), 31 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/serial/lantiq_asc.txt
>  create mode 100644 Documentation/devicetree/bindings/serial/lantiq_asc.yaml


> diff --git a/Documentation/devicetree/bindings/serial/lantiq_asc.yaml b/Documentation/devicetree/bindings/serial/lantiq_asc.yaml
> new file mode 100644
> index 000000000000..54b90490f4fb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/lantiq_asc.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/serial/lantiq_asc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Lantiq SoC ASC serial controller
> +
> +maintainers:
> +  - Rahul Tanwar <rahul.tanwar@...el.com>
> +
> +allOf:
> +  - $ref: /schemas/serial.yaml#
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      items:
> +        - const: lantiq,asc
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    minItems: 1

Technically, 1 item is not allowed until patch 2 (or the old doc was wrong).

> +    maxItems: 3
> +    items:
> +      - description: tx or combined interrupt
> +      - description: rx interrupt
> +      - description: err interrupt
> +
> +  clocks:
> +    description:
> +      When present, first entry listed should contain phandle
> +      to the frequency clock and second entry should contain
> +      phandle to the gate clock.

Schema needs to define how many entries:

items:
  - description: ...
  - description: ...

> +
> +  clock-names:
> +    items:
> +      - const: freq
> +      - const: asc
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +
> +examples:
> +  - |
> +    asc0: serial@...00000 {
> +            compatible = "lantiq,asc";
> +            reg = <0x16600000 0x100000>;
> +            interrupt-parent = <&gic>;
> +            interrupts = <GIC_SHARED 103 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SHARED 105 IRQ_TYPE_LEVEL_HIGH>,
> +                         <GIC_SHARED 106 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&cgu CLK_SSX4>, <&cgu GCLK_UART>;
> +            clock-names = "freq", "asc";
> +    };
> +
> +  - |
> +    asc1: serial@...0c00 {

I don't think this 2nd example adds anything.

> +            compatible = "lantiq,asc";
> +            reg = <0xE100C00 0x400>;
> +            interrupt-parent = <&icu0>;
> +            interrupts = <112 113 114>;
> +    };
> +
> +...
> --
> 2.11.0
>

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