linux-kernel - Re: Need help converting usb/faraday,fotg210.yaml to yaml

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Date:   Fri, 16 Apr 2021 08:46:42 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: Need help converting usb/faraday,fotg210.yaml to yaml

On Fri, Apr 16, 2021 at 8:18 AM Corentin Labbe
<clabbe.montjoie@...il.com> wrote:
>
> Hello
>
> I am converting Documentation/devicetree/bindings/usb/faraday,fotg210.txt to yaml with the patch attached below.
> But validating it give me:
> Documentation/devicetree/bindings/usb/faraday,fotg210.example.dt.yaml: usb@...00000: 'syscon', 'wakeup-source' do not match any of the regexes: 'pinctrl-[0-9]+'

These have to be defined at the top level, not just the if/then
schema. More below...

>
> I dont know from where came this pinctrl regex.

The tooling adds it.

> I think this is perhaps due to the if not matched, but still didnt find any solution.
>
> Thanks
>
> --- a/Documentation/devicetree/bindings/usb/faraday,fotg210.txt
> +++ /dev/null
> @@ -1,35 +0,0 @@
> -Faraday FOTG Host controller
> -
> -This OTG-capable USB host controller is found in Cortina Systems
> -Gemini and other SoC products.
> -
> -Required properties:
> -- compatible: should be one of:
> -  "faraday,fotg210"
> -  "cortina,gemini-usb", "faraday,fotg210"
> -- reg: should contain one register range i.e. start and length
> -- interrupts: description of the interrupt line
> -
> -Optional properties:
> -- clocks: should contain the IP block clock
> -- clock-names: should be "PCLK" for the IP block clock
> -
> -Required properties for "cortina,gemini-usb" compatible:
> -- syscon: a phandle to the system controller to access PHY registers
> -
> -Optional properties for "cortina,gemini-usb" compatible:
> -- cortina,gemini-mini-b: boolean property that indicates that a Mini-B
> -  OTG connector is in use
> -- wakeup-source: see power/wakeup-source.txt
> -
> -Example for Gemini:
> -
> -usb@...00000 {
> -       compatible = "cortina,gemini-usb", "faraday,fotg210";
> -       reg = <0x68000000 0x1000>;
> -       interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
> -       clocks = <&cc 12>;
> -       clock-names = "PCLK";
> -       syscon = <&syscon>;
> -       wakeup-source;
> -};
> diff --git a/Documentation/devicetree/bindings/usb/faraday,fotg210.yaml b/Documentation/devicetree/bindings/usb/faraday,fotg210.yaml
> new file mode 100644
> index 000000000000..b5418f29745e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/faraday,fotg210.yaml
> @@ -0,0 +1,78 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/faraday,fotg210.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Faraday FOTG Host controller
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@...aro.org>
> +
> +description: |
> +    This OTG-capable USB host controller is found in Cortina Systems
> +    Gemini and other SoC products.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: faraday,fotg210
> +      - items:
> +        - const: cortina,gemini-usb
> +        - const: faraday,fotg210
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: PCLK
> +
> +  resets:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +if:
> +  properties:
> +    compatible:
> +      contains:
> +        const: cortina,gemini-usb
> +then:
> +  properties:
> +    syscon:
> +      maxItems: 1
> +      $ref: /schemas/types.yaml#/definitions/phandle
> +      description: Phandle to the system controller to access PHY registers
> +    cortina,gemini-mini-b:
> +      type: boolean
> +      description: boolean property that indicates that a Mini-B OTG connector is in use
> +    wakeup-source:
> +      type: boolean
> +      description: see power/wakeup-source.txt

Move these definitions to the top level 'properties'. Then add an else clause:

else:
  properties:
    syscon: false
    cortina,gemini-mini-b: false
    wakeup-source: false

> +  required:
> +    - syscon
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    usb@...00000 {
> +      compatible = "cortina,gemini-usb", "faraday,fotg210";
> +      reg = <0x68000000 0x1000>;
> +      interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
> +      clocks = <&cc 12>;
> +      clock-names = "PCLK";
> +      syscon = <&syscon>;
> +      wakeup-source;
> +    };
> +...
>