linux-kernel - Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: fsl,ls-extirq: convert to YAML

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Date:   Mon, 25 Apr 2022 20:36:53 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Michael Walle <michael@...le.cc>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Li Yang <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: fsl,ls-extirq:
 convert to YAML

On 25/04/2022 16:02, Michael Walle wrote:
> Convert the fsl,ls-extirq binding to the new YAML format.
> 

(...)

> diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-extirq.yaml b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-extirq.yaml
> new file mode 100644
> index 000000000000..39d120ad7549
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,ls-extirq.yaml
> @@ -0,0 +1,88 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/interrupt-controller/fsl,ls-extirq.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale Layerscape External Interrupt Controller
> +
> +maintainers:
> +  - Shawn Guo <shawnguo@...nel.org>
> +  - Li Yang <leoyang.li@....com>
> +
> +description: |
> +  Some Layerscape SOCs (LS1021A, LS1043A, LS1046A LS1088A, LS208xA,
> +  LX216xA) support inverting the polarity of certain external interrupt
> +  lines.
> +
> +allOf:
> +  - $ref: /schemas/interrupt-controller.yaml#

I have doubts whether this is here applicable. See also Rob's comment:
https://lore.kernel.org/all/YjjJpxLWJ%2FYOe0OX@robh.at.kernel.org/

This device does not have children, so the interrupt-controller schema
should be probably skipped.


> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - fsl,ls1021a-extirq
> +          - fsl,ls1043a-extirq
> +          - fsl,ls1088a-extirq
> +      - items:
> +          - enum:
> +              - fsl,ls1046a-extirq
> +          - const: fsl,ls1043a-extirq
> +      - items:
> +          - enum:
> +              - fsl,ls2080a-extirq
> +              - fsl,lx2160a-extirq
> +          - const: fsl,ls1088a-extirq
> +
> +  '#interrupt-cells':
> +    const: 2
> +
> +  '#address-cells':
> +    const: 0
> +
> +  interrupt-controller: true
> +
> +  reg:
> +    maxItems: 1
> +    description:
> +      Specifies the Interrupt Polarity Control Register (INTPCR) in the
> +      SCFG or the External Interrupt Control Register (IRQCR) in the ISC.
> +
> +  interrupt-map:
> +    description: Specifies the mapping from external interrupts to GIC interrupts.
> +
> +  interrupt-map-mask:
> +    items:
> +      - const: 0xffffffff

This looks highly permissive mask and should be instead defined per
variant, for example (quickly looking at DTS):
0x7 for ls1021
0xf for ls1043a and ls1088a

You might need to correct the DTS. Some confirmation from someone with
datasheet would be good.


Best regards,
Krzysztof