linux-kernel - Re: [PATCH 1/7] dt-bindings: arm: coresight-tmc: Add "memory-region" property

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Date:   Sat, 30 Sep 2023 17:28:50 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Linu Cherian <lcherian@...vell.com>, suzuki.poulose@....com,
        mike.leach@...aro.org, james.clark@....com, leo.yan@...aro.org
Cc:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        devicetree@...r.kernel.org, sgoutham@...vell.com,
        gcherian@...vell.com
Subject: Re: [PATCH 1/7] dt-bindings: arm: coresight-tmc: Add "memory-region"
 property

On 29/09/2023 15:37, Linu Cherian wrote:
> memory-region 0: Reserved trace buffer memory
> 
>   TMC ETR: When available, use this reserved memory region for
>   trace data capture. Same region is used for trace data
>   retention after a panic or watchdog reset.
> 
>   TMC ETF: When available, use this reserved memory region for
>   trace data retention synced from internal SRAM after a panic or
>   watchdog reset.
> 
> memory-region 1: Reserved meta data memory
> 
>   TMC ETR, ETF: When available, use this memory for register
>   snapshot retention synced from hardware registers after a panic
>   or watchdog reset.
> 
> Signed-off-by: Linu Cherian <lcherian@...vell.com>
> ---

Where is the changelog? This is supposed to be v4 or something later.
Please, keep proper versioning and changelog.

>  .../bindings/arm/arm,coresight-tmc.yaml       | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
> index cb8dceaca70e..45ca4d02d73e 100644
> --- a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
> +++ b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
> @@ -101,6 +101,22 @@ properties:
>            and ETF configurations.
>          $ref: /schemas/graph.yaml#/properties/port
>  
> +  memory-region:
> +    items:
> +      - description: Reserved trace buffer memory for ETR and ETF sinks.
> +          For ETR, this reserved memory region is used for trace data capture.
> +          Same region is used for trace data retention as well after a panic
> +          or watchdog reset.
> +          For ETF, this reserved memory region is used for retention of trace
> +          data synced from internal SRAM after a panic or watchdog reset.
> +
> +      - description: Reserved meta data memory. Used for ETR and ETF sinks.
> +
> +  memory-region-names:
> +    items:
> +      - const: trace-mem
> +      - const: metadata-mem

Drop the 'mem' suffixes.


Best regards,
Krzysztof