linux-kernel - Re: [Patch v5 3/4] dt-bindings: memory: Update reg maxitems for tegra186

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Message-ID: <74db8a20-7cce-ff86-7ae4-466416443ba9@canonical.com>
Date:   Sun, 20 Mar 2022 13:42:12 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Ashish Mhetre <amhetre@...dia.com>, robh+dt@...nel.org,
        thierry.reding@...il.com, digetx@...il.com, jonathanh@...dia.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v5 3/4] dt-bindings: memory: Update reg maxitems for
 tegra186

On 16/03/2022 10:25, Ashish Mhetre wrote:
> From tegra186 onwards, memory controller support multiple channels.
> Reg items are updated with address and size of these channels.
> Tegra186 has overall 5 memory controller channels. Tegra194 and tegra234
> have overall 17 memory controller channels each.
> There is 1 reg item for memory controller stream-id registers.
> So update the reg maxItems to 18 in tegra186 devicetree documentation.
> 
> Signed-off-by: Ashish Mhetre <amhetre@...dia.com>
> ---
>  .../nvidia,tegra186-mc.yaml                   | 20 +++++++++++++------
>  1 file changed, 14 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> index 13c4c82fd0d3..3c4e231dc1de 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml
> @@ -34,8 +34,8 @@ properties:
>            - nvidia,tegra234-mc
>  
>    reg:
> -    minItems: 1
> -    maxItems: 3
> +    minItems: 6
> +    maxItems: 18

Still ABI break and now the in-kernel DTS will report dt check errors.

I think you ignored the comments you got about breaking ABI.

Best regards,
Krzysztof