linux-kernel - Re: [PATCH 1/2] dt-bindings: nvmem: add "data-size" property

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Message-ID: <9b7676f4-4922-40cc-98b2-67224c901773@gmail.com>
Date:   Wed, 13 Dec 2023 16:49:02 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>,
        Christian Marangi <ansuelsmth@...il.com>
Subject: Re: [PATCH 1/2] dt-bindings: nvmem: add "data-size" property

On 13.12.2023 16:47, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> Allow specifying NVMEM device content size in case it differs from
> device total size.
> 
> Cc: Christian Marangi <ansuelsmth@...il.com>
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>

I forgot to link Rob's comment where he suggested we may need such a property:
https://patchwork.ozlabs.org/comment/3154781/

Let's now see if I got it right.


> ---
>   Documentation/devicetree/bindings/nvmem/nvmem.yaml | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/nvmem.yaml b/Documentation/devicetree/bindings/nvmem/nvmem.yaml
> index 4fd015d402ce..095aed4250de 100644
> --- a/Documentation/devicetree/bindings/nvmem/nvmem.yaml
> +++ b/Documentation/devicetree/bindings/nvmem/nvmem.yaml
> @@ -26,6 +26,13 @@ properties:
>     "#size-cells":
>       const: 1
>   
> +  data-size:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      NVMEM device actual data (content) size. It may be need to be specified
> +      if it differs by design from the total NVMEM device size and it's
> +      impossible to determine it on runtime.
> +
>     read-only:
>       $ref: /schemas/types.yaml#/definitions/flag
>       description: