linux-kernel - Re: [PATCH v3] dt-bindings: interrupt-controller: Convert Atmel AIC to json-schema

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Message-ID: <01916920-5ad3-4f6b-a53d-649dccec6999@microchip.com>
Date: Thu, 22 Feb 2024 08:59:28 +0000
From: <Dharma.B@...rochip.com>
To: <conor@...nel.org>
CC: <robh@...nel.org>, <tglx@...utronix.de>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
	<Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<Conor.Dooley@...rochip.com>
Subject: Re: [PATCH v3] dt-bindings: interrupt-controller: Convert Atmel AIC
 to json-schema

On 22/02/24 2:26 pm, Conor Dooley wrote:
>> diff --git a/Documentation/devicetree/bindings/interrupt-controller/atmel,aic.yaml b/Documentation/devicetree/bindings/interrupt-controller/atmel,aic.yaml
>> new file mode 100644
>> index 000000000000..0d51bd78bf2b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/interrupt-controller/atmel,aic.yaml
>> @@ -0,0 +1,89 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id:http://devicetree.org/schemas/interrupt-controller/atmel,aic.yaml#
>> +$schema:http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Advanced Interrupt Controller (AIC)
>> +
>> +maintainers:
>> +  - Nicolas Ferre<nicolas.ferre@...rochip.com>
>> +  - Dharma balasubiramani<dharma.b@...rochip.com>
>> +
>> +description:
>> +  The Advanced Interrupt Controller (AIC) is an 8-level priority, individually
>> +  maskable, vectored interrupt controller providing handling of up to one
>> +  hundred and twenty-eight interrupt sources.
>> +
>> +allOf:
>> +  - $ref: /schemas/interrupt-controller.yaml#
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            const: atmel,at91rm9200-aic
>> +    then:
>> +      properties:
>> +        atmel,external-irqs:
>> +          minItems: 1
>> +          maxItems: 7
>> +    else:
>> +      properties:
>> +        atmel,external-irqs:
>> +          minItems: 1
>> +          maxItems: 1
> When there's property restrictions being applied, move the allof down
> to...
> 
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - atmel,at91rm9200-aic
>> +      - atmel,sama5d2-aic
>> +      - atmel,sama5d3-aic
>> +      - atmel,sama5d4-aic
>> +      - microchip,sam9x60-aic
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupt-controller: true
>> +
>> +  "#interrupt-cells":
>> +    const: 3
>> +    description: |
>> +      The 1st cell is the IRQ number (Peripheral IDentifier on datasheet).
>> +      The 2nd cell specifies flags:
>> +        bits[3:0] trigger type and level flags:
>> +          1 = low-to-high edge triggered.
>> +          2 = high-to-low edge triggered.
>> +          4 = active high level-sensitive.
>> +          8 = active low level-sensitive.
>> +        Valid combinations: 1, 2, 3, 4, 8.
>> +        Default for internal sources: 4 (active high).
>> +      The 3rd cell specifies irq priority from 0 (lowest) to 7 (highest).
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  atmel,external-irqs:
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    description: u32 array of external irqs.
> ...here. Both work, but seeing the restrictions before you see any of
> the properties is not the most understandable.

Understood, I will move it here.

> 
> Cheers,
> Conor.
> 
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupt-controller
>> +  - "#interrupt-cells"
>> +  - atmel,external-irqs
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    interrupt-controller@...ff000 {
>> +      compatible = "atmel,at91rm9200-aic";
>> +      reg = <0xfffff000 0x200>;
>> +      interrupt-controller;
>> +      #interrupt-cells = <3>;
>> +      atmel,external-irqs = <31>;
>> +    };
>> +...
>>
>> base-commit: 4f5e5092fdbf5cec6bedc19fbe69cce4f5f08372
>> -- 
>> 2.25.1

-- 
With Best Regards,
Dharma B.