linux-kernel - Re: [PATCH v2 1/3] dt-bindings: mtd: fixed-partitions: Add binman compatible

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Date:   Wed, 4 Oct 2023 09:36:20 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Simon Glass <sjg@...omium.org>
Cc:     devicetree@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Tom Rini <trini@...sulko.com>,
        U-Boot Mailing List <u-boot@...ts.denx.de>,
        linux-mtd@...ts.infradead.org, Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Pratyush Yadav <ptyadav@...zon.de>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Richard Weinberger <richard@....at>,
        Rob Herring <robh+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: mtd: fixed-partitions: Add binman
 compatible

Hi Simon,

sjg@...omium.org wrote on Mon,  2 Oct 2023 11:49:40 -0600:

> Add a compatible string for binman, so we can extend fixed-partitions
> in various ways.

I've been thinking at the proper way to describe the binman partitions.
I am wondering if we should really extend the fixed-partitions
schema. This description is really basic and kind of supposed to remain
like that. Instead, I wonder if we should not just keep the binman
compatible alone, like many others already. This way it would be very clear
what is expected and allowed in both cases. I am thinking about
something like that:

	Documentation/devicetree/bindings/mtd/partitions/brcm,bcm4908-partitions.yaml 

this file is also referenced there (but this patch does the same, which
is what I'd expect):

	Documentation/devicetree/bindings/mtd/partitions/partitions.yaml

I'll let the binding maintainers judge whether they think it's
relevant, it's not a strong opposition.

> Signed-off-by: Simon Glass <sjg@...omium.org>
> ---

[...]

> +properties:
> +  compatible:
> +    const: binman

Right now this does not fit (I believe) the example. But if we no
longer extend fixed-partitions but just create binman.yaml, this will
probably be enough.

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    partitions {
> +        compatible = "binman", "fixed-partitions";
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +
> +        partition@...000 {
> +            label = "u-boot";
> +            reg = <0x100000 0xf00000>;
> +        };
> +    };

Thanks,
Miquèl