linux-kernel - Re: [PATCH 1/5] dt-bindings: memory: tegra: Document #interconnect-cells property

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Date:   Tue, 23 Nov 2021 20:53:49 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Jon Hunter <jonathanh@...dia.com>, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] dt-bindings: memory: tegra: Document
 #interconnect-cells property

On 12/11/2021 14:06, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
> 
> The #interconnect-cells properties are required to hook up memory
> clients to the MC/EMC in interconnects properties. Add a description for
> these properties.
> 
> Also, allow multiple reg and interrupt entries required by Tegra194 and
> later.
> 
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
>  .../memory-controllers/nvidia,tegra186-mc.yaml       | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> index 611bda38d187..f6e4af4e86cf 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> @@ -33,10 +33,10 @@ properties:
>            - nvidia,tegra194-mc
>  
>    reg:
> -    maxItems: 1
> +    maxItems: 3
>  
>    interrupts:
> -    maxItems: 1
> +    maxItems: 2

All these here and reg below might need if-else to define when one item
is allowed, when not. For example - can nvidia,tegra234-mc come with
only one reg?

Except this and Rob's DT-checker-bot rest of patches look ok to me.


Best regards,
Krzysztof

>  
>    "#address-cells":
>      const: 2
> @@ -48,6 +48,9 @@ properties:
>  
>    dma-ranges: true
>  
> +  "#interconnect-cells":
> +    const: 1
> +
>  patternProperties:
>    "^external-memory-controller@[0-9a-f]+$":
>      description:
> @@ -65,7 +68,7 @@ patternProperties:
>                - nvidia,tegra194-emc
>  
>        reg:
> -        maxItems: 1
> +        maxItems: 2
>  
>        interrupts:
>          maxItems: 1
> @@ -78,6 +81,9 @@ patternProperties:
>          items:
>            - const: emc


Best regards,
Krzysztof