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Message-ID: <a95fc4a9-af6b-e2c2-ef41-df9742d393de@linaro.org>
Date:   Tue, 3 May 2022 14:19:39 +0200
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Subject: Re: [PATCH 1/2] dt-bindings: remoteproc: mediatek: Fix optional
 reg-names for mtk,scp
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To:     =?UTF-8?B?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= 
        <nfraprado@collabora.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>, kernel@collabora.com,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Tinghan Shen <tinghan.shen@mediatek.com>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
        linux-remoteproc@vger.kernel.org
References: <20220429211111.2214119-1-nfraprado@collabora.com>
 <20220429211111.2214119-2-nfraprado@collabora.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20220429211111.2214119-2-nfraprado@collabora.com>
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Precedence: bulk

On 29/04/2022 23:11, Nícolas F. R. A. Prado wrote:
> The SCP has three memory regions: sram, l1tcm and cfg. Only sram is
> required, the other two are optional. Fix the dt-binding so that the
> optional regions can be omitted and passed in any order.

No, cannot be passed in any order.

> 
> Also add the missing minItems to the reg property and update the
> description.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> 
> ---
> 
>  .../devicetree/bindings/remoteproc/mtk,scp.yaml      | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> index 823a236242de..ec9ddeb6ca2c 100644
> --- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> @@ -24,14 +24,20 @@ properties:
>    reg:
>      description:
>        Should contain the address ranges for memory regions SRAM, CFG, and
> -      L1TCM.
> +      L1TCM. Only SRAM is required, while CFG and L1TCM are optional.
> +    minItems: 1
>      maxItems: 3
>  
>    reg-names:
> +    minItems: 1
>      items:
>        - const: sram
> -      - const: cfg
> -      - const: l1tcm
> +      - enum:
> +          - l1tcm
> +          - cfg
> +      - enum:
> +          - l1tcm
> +          - cfg

This allows them in any combination which is not what we want. If both
are optional and both can appear, then last should be a const:l1tcm.

Best regards,
Krzysztof