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Subject: Re: [PATCH] dt-bindings: interrupt-controller: Convert stm32-exti to
 json-schema
To:     Rob Herring <robh+dt@kernel.org>
CC:     Mark Rutland <mark.rutland@arm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <maz@kernel.org>, <devicetree@vger.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>
References: <20191114164104.22782-1-alexandre.torgue@st.com>
 <CAL_JsqKJZwJ0MyRp37Y-F0ujPdVEKARd8qcUCN1xmawpkiffLg@mail.gmail.com>
From:   Alexandre Torgue <alexandre.torgue@st.com>
Message-ID: <7415fff5-030c-a65b-a405-a1197e166432@st.com>
Date:   Fri, 15 Nov 2019 18:28:32 +0100
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On 11/14/19 6:18 PM, Rob Herring wrote:
> On Thu, Nov 14, 2019 at 10:41 AM Alexandre Torgue
> <alexandre.torgue@st.com> wrote:
>>
>> Convert the STM32 external interrupt controller (EXTI) binding to DT
>> schema format using json-schema.
>>
>> Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
>> ---
>>
>> Hi Rob,
>>
>> I planned to use "additionalProperties: false" for this schema but as I add a
>> property under condition, I got an error (property added under contion seems
>> to be detected as an "additional" property and then error is raised).
>>
>> Is there a way to fix that ?
> 
> See below.
> 
>>
>> regards
>> Alex
>>
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.txt b/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.txt
>> deleted file mode 100644
>> index cd01b2292ec6..000000000000
>> --- a/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.txt
>> +++ /dev/null
>> @@ -1,29 +0,0 @@
>> -STM32 External Interrupt Controller
>> -
>> -Required properties:
>> -
>> -- compatible: Should be:
>> -    "st,stm32-exti"
>> -    "st,stm32h7-exti"
>> -    "st,stm32mp1-exti"
>> -- reg: Specifies base physical address and size of the registers
>> -- interrupt-controller: Indentifies the node as an interrupt controller
>> -- #interrupt-cells: Specifies the number of cells to encode an interrupt
>> -  specifier, shall be 2
>> -- interrupts: interrupts references to primary interrupt controller
>> -  (only needed for exti controller with multiple exti under
>> -  same parent interrupt: st,stm32-exti and st,stm32h7-exti)
>> -
>> -Optional properties:
>> -
>> -- hwlocks: reference to a phandle of a hardware spinlock provider node.
>> -
>> -Example:
>> -
>> -exti: interrupt-controller@40013c00 {
>> -       compatible = "st,stm32-exti";
>> -       interrupt-controller;
>> -       #interrupt-cells = <2>;
>> -       reg = <0x40013C00 0x400>;
>> -       interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;
>> -};
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml b/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml
>> new file mode 100644
>> index 000000000000..39be37e1e532
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml
>> @@ -0,0 +1,82 @@
>> +# SPDX-License-Identifier: GPL-2.0
> 
> If ST has copyright on the old binding, can you add BSD here.
> 

I will.

>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/interrupt-controller/st,stm32-exti.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: STM32 External Interrupt Controller Device Tree Bindings
>> +
>> +maintainers:
>> +  - Alexandre Torgue <alexandre.torgue@st.com>
>> +  - Ludovic Barre <ludovic.barre@st.com>
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - items:
>> +        - enum:
>> +          - st,stm32-exti
>> +          - st,stm32h7-exti
>> +      - items:
>> +        - enum:
>> +          - st,stm32mp1-exti
>> +        - const: syscon
>> +
>> +  "#interrupt-cells":
>> +    const: 2
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupt-controller: true
>> +
>> +  hwlocks:
>> +    maxItems: 1
>> +    description:
>> +      Reference to a phandle of a hardware spinlock provider node.
>> +
>> +required:
>> +  - "#interrupt-cells"
>> +  - compatible
>> +  - reg
>> +  - interrupt-controller
>> +
>> +allOf:
>> +  - $ref: /schemas/interrupt-controller.yaml#
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - st,stm32-exti
>> +              - st,stm32h7-exti
>> +    then:
>> +      properties:
>> +        interrupts:
>> +          allOf:
>> +            - $ref: /schemas/types.yaml#/definitions/uint32-array
> 
> Standard property, doesn't need a type. You just need 'maxItems' or an
> 'items' list if the index is not meaningful. This appears to be the
> former case.

ok

> 
>> +          description:
>> +            Interrupts references to primary interrupt controller
>> +      required:
>> +        - interrupts
> 
> You can move the definition to the main section as you only need
> 'required' here. That should fix your additionalProperties issue.
> 
Doing that it fails as I don't have interrupts define for mp1 
compatible. Maybe I missed something ?

> In hindsight, the mp1 case probably should have used interrupt-map.

For MP1 driver is written differently and mapping is done inside the driver.

> 
>> +
>> +examples:
>> +  - |
>> +    //Example 1
>> +    exti1: interrupt-controller@5000d000 {
>> +        compatible = "st,stm32mp1-exti", "syscon";
>> +        interrupt-controller;
>> +        #interrupt-cells = <2>;
>> +        reg = <0x5000d000 0x400>;
>> +    };
>> +
>> +    //Example 2
>> +    exti2: interrupt-controller@40013c00 {
>> +        compatible = "st,stm32-exti";
>> +        interrupt-controller;
>> +        #interrupt-cells = <2>;
>> +        reg = <0x40013C00 0x400>;
>> +        interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;
>> +    };
>> +
>> +...
>> --
>> 2.17.1
>>