linux-kernel - Re: [PATCH v5 1/4] dt-bindings: arm: coresight: Add new compatible for static replicator

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Message-ID: <CANLsYkw1vaevcJZfjQfF9BeUvi1THGNtu+SH+LR008LjZOc7fA@mail.gmail.com>
Date:   Tue, 16 Apr 2019 14:18:40 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     Suzuki K Poulose <suzuki.poulose@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 1/4] dt-bindings: arm: coresight: Add new compatible
 for static replicator

Hi Leo,

On Fri, 12 Apr 2019 at 04:28, Leo Yan <leo.yan@...aro.org> wrote:
>
> CoreSight uses below bindings for replicator:
>
>   Dynamic replicator, aka. configurable replicator:
>     "arm,coresight-dynamic-replicator", "arm,primecell";
>
>   Static replicator, aka. non-configurable replicator:
>     "arm,coresight-replicator";
>
> The compatible string "arm,coresight-replicator" is not an explicit
> naming to express the replicator is 'static'.  To unify the naming
> convention, this patch introduces a new compatible string
> "arm,coresight-static-replicator" for the static replicator; the
> compatible string "arm,coresight-replicator" is kept for backward
> compatibility, but tag it as obsolete and suggest to use the new
> compatible string.
>
> As result CoreSight replicator have below bindings:
>
>   Dynamic replicator:
>     "arm,coresight-dynamic-replicator", "arm,primecell";
>
>   Static replicator:
>     "arm,coresight-static-replicator";
>     "arm,coresight-replicator"; (obsolete)
>
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  Documentation/devicetree/bindings/arm/coresight.txt | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> index f8aff65ab921..d02d160fa8ac 100644
> --- a/Documentation/devicetree/bindings/arm/coresight.txt
> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> @@ -69,7 +69,10 @@ its hardware characteristcs.
>
>         * compatible: Currently supported value is (note the absence of the
>           AMBA markee):
> -               - "arm,coresight-replicator"
> +               - Coresight Non-configurable Replicator:
> +                       "arm,coresight-static-replicator";
> +                       "arm,coresight-replicator"; (OBSOLETE. For backward
> +                               compatibility and will be removed)
>
>         * port or ports: see "Graph bindings for Coresight" below.
>
> @@ -169,7 +172,7 @@ Example:
>                 /* non-configurable replicators don't show up on the
>                  * AMBA bus.  As such no need to add "arm,primecell".
>                  */
> -               compatible = "arm,coresight-replicator";
> +               compatible = "arm,coresight-static-replicator";
>
>                 out-ports {
>                         #address-cells = <1>;
> --
> 2.17.1

Since this is a binding patch it needs to be sent on its own.

>