linux-kernel - Re: [PATCH] dt-bindings: arm: socfpga: Add Altera SOCFPGA SDRAM EDAS

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Message-ID: <5f9f4062-91e0-43e0-9ef5-48e30ca68ac9@kernel.org>
Date: Thu, 1 Aug 2024 10:44:03 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Alessandro Zanni <alessandro.zanni87@...il.com>, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, skhan@...uxfoundation.org
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: arm: socfpga: Add Altera SOCFPGA SDRAM EDAS

On 01/08/2024 01:02, Alessandro Zanni wrote:

Thank you for your patch. There is something to discuss/improve.


> diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-sdram-edac.yaml b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram-edac.yaml
> new file mode 100644
> index 000000000000..78fbe31e4a2b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram-edac.yaml

Filename like compatible, so altr,sdram-edac.yaml

Fix the placement - arm is only for top-level sutff. This goes to
memory-controllers or edac



> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/altera/socfpga-sdram-edac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Altera SOCFPGA SDRAM Error Detection & Correction [EDAC]
> +
> +maintainers:
> +  - Dinh Nguyen <dinguyen@...nel.org>
> +
> +description:
> +  The EDAC accesses a range of registers in the SDRAM controller.
> +
> +properties:
> +  compatible:
> +    oneOf:

Drop oneOf

> +      - items:

Drop items, just use enum


> +          - enum:
> +              - altr,sdram-edac
> +              - altr,sdram-edac-a10
> +
> +  altr,sdr-syscon:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: 
> +      Phandle of the sdr module
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - altr,sdr-syscon
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    sdramedac {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

e.g. memory-controller


> +      compatible = "altr,sdram-edac";
> +      altr,sdr-syscon = <&sdr>;
> +      interrupts = <0 39 4>;

Use proper defines.

> +    };
> +
> +...

Best regards,
Krzysztof