linux-kernel - Re: [PATCH] dt-bindings: soc: Add new board description for MicroBlaze V

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Message-ID: <20231106-hangnail-prankster-a04e713bed35@spud>
Date:   Mon, 6 Nov 2023 17:07:55 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Michal Simek <michal.simek@....com>
Cc:     linux-kernel@...r.kernel.org, monstr@...str.eu,
        michal.simek@...inx.com, git@...inx.com,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: soc: Add new board description for
 MicroBlaze V

On Mon, Nov 06, 2023 at 12:53:40PM +0100, Michal Simek wrote:
> MicroBlaze V is new AMD/Xilinx soft-core 32bit RISC-V processor IP.
> It is hardware compatible with classic MicroBlaze processor. Processor can
> be used with standard AMD/Xilinx IPs including interrupt controller and
> timer.
> 
> Signed-off-by: Michal Simek <michal.simek@....com>
> ---
> 
>  .../devicetree/bindings/soc/amd/amd.yaml      | 26 +++++++++++++++++++

Bindings for SoCs (and by extension boards with them) usually go to in
$arch/$vendor.yaml not into soc/$vendor/$vendor.yaml. Why is this any
different?

>  1 file changed, 26 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/amd/amd.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/amd/amd.yaml b/Documentation/devicetree/bindings/soc/amd/amd.yaml
> new file mode 100644
> index 000000000000..21adf28756fa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/amd/amd.yaml
> @@ -0,0 +1,26 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/amd/amd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AMD Platforms
> +
> +maintainers:
> +  - Michal Simek <michal.simek@....com>
> +
> +description: |
> +  AMD boards with MicroBlaze V SOC
> +
> +properties:
> +  $nodename:
> +    const: '/'
> +  compatible:
> +    oneOf:
> +      - description: AMD MicroBlaze V
> +        items:
> +          - const: amd,mbv

You don't actually list any boards here, but instead permit having only
the SoC compatible and no board one. The SoC compatible is also
incredibly generic. Personally I don't think this binding makes any
sense as it appears to exist as a catch all for anything using your
new cores in any combination.

Cheers,
Conor.

> +
> +additionalProperties: true
> +
> +...
> -- 
> 2.36.1
> 

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