linux-kernel - Re: [PATCH] dt-bindings: mfd: Ensure 'syscon' has a more specific compatible

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Message-ID: <20200611063809.GW4106@dell>
Date:   Thu, 11 Jun 2020 07:38:09 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Rob Herring <robh@...nel.org>, arnd@...db.de
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Maxime Ripard <maxime@...no.tech>
Subject: Re: [PATCH] dt-bindings: mfd: Ensure 'syscon' has a more specific
 compatible

Arnd,

On Wed, 10 Jun 2020, Rob Herring wrote:

> Using 'syscon' alone should be avoided as compatible strings should be
> specific enough to identify the exact set of registers contained. Update
> the schema to ensure at least 2 compatible strings are present.

I'm assuming you're okay with this?

> Cc: Lee Jones <lee.jones@...aro.org>
> Cc: Maxime Ripard <maxime@...no.tech>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> FYI, there's 43 cases of this on arm32 in my testing.
> 
>  Documentation/devicetree/bindings/mfd/syscon.yaml | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml b/Documentation/devicetree/bindings/mfd/syscon.yaml
> index 19bdaf781853..af7a68051392 100644
> --- a/Documentation/devicetree/bindings/mfd/syscon.yaml
> +++ b/Documentation/devicetree/bindings/mfd/syscon.yaml
> @@ -43,7 +43,8 @@ properties:
>  
>        - contains:
>            const: syscon
> -        additionalItems: true
> +        minItems: 2
> +        maxItems: 4  # Should be enough
>  
>    reg:
>      maxItems: 1

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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