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Date: Tue, 16 Apr 2019 14:20:10 -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>,
Wanglai Shi <shiwanglai@...ilicon.com>
Subject: Re: [PATCH v5 3/4] dt-bindings: arm: coresight: Unify funnel DT binding
On Fri, 12 Apr 2019 at 04:28, Leo Yan <leo.yan@...aro.org> wrote:
>
> Following the same fashion with replicator DT binding, this patch is to
> unify the DT binding for funnel to support static and dynamic modes;
> finally we get the funnel DT binding as below:
>
> Before patch:
>
> Static funnel, aka. non-configurable funnel:
> Not supported;
>
> Dynamic funnel, aka. configurable funnel:
> "arm,coresight-funnel", "arm,primecell";
>
> After patch:
>
> Static funnel:
> "arm,coresight-static-funnel";
>
> Dynamic funnel:
> "arm,coresight-dynamic-funnel", "arm,primecell";
> "arm,coresight-funnel", "arm,primecell"; (obsolete)
>
> At the end of this patch, it gives an example for static funnel DT
> binding, and updates the dynamic funnel example.
>
> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> Cc: Suzuki K Poulose <suzuki.poulose@....com>
> Cc: Wanglai Shi <shiwanglai@...ilicon.com>
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
> .../devicetree/bindings/arm/coresight.txt | 53 +++++++++++++++++--
> 1 file changed, 48 insertions(+), 5 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> index d02d160fa8ac..8a88ddebc1a2 100644
> --- a/Documentation/devicetree/bindings/arm/coresight.txt
> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> @@ -8,7 +8,8 @@ through the intermediate links connecting the source to the currently selected
> sink. Each CoreSight component device should use these properties to describe
> its hardware characteristcs.
>
> -* Required properties for all components *except* non-configurable replicators:
> +* Required properties for all components *except* non-configurable replicators
> + and non-configurable funnels:
>
> * compatible: These have to be supplemented with "arm,primecell" as
> drivers are using the AMBA bus interface. Possible values include:
> @@ -24,8 +25,10 @@ its hardware characteristcs.
> discovered at boot time when the device is probed.
> "arm,coresight-tmc", "arm,primecell";
>
> - - Trace Funnel:
> - "arm,coresight-funnel", "arm,primecell";
> + - Trace Programmable Funnel:
> + "arm,coresight-dynamic-funnel", "arm,primecell";
> + "arm,coresight-funnel", "arm,primecell"; (OBSOLETE. For
> + backward compatibility and will be removed)
>
> - Embedded Trace Macrocell (version 3.x) and
> Program Flow Trace Macrocell:
> @@ -65,7 +68,7 @@ its hardware characteristcs.
> "stm-stimulus-base", each corresponding to the areas defined in "reg".
>
> * Required properties for devices that don't show up on the AMBA bus, such as
> - non-configurable replicators:
> + non-configurable replicators and non-configurable funnels:
>
> * compatible: Currently supported value is (note the absence of the
> AMBA markee):
> @@ -74,6 +77,9 @@ its hardware characteristcs.
> "arm,coresight-replicator"; (OBSOLETE. For backward
> compatibility and will be removed)
>
> + - Coresight Non-configurable Funnel:
> + "arm,coresight-static-funnel";
> +
> * port or ports: see "Graph bindings for Coresight" below.
>
> * Optional properties for ETM/PTMs:
> @@ -203,8 +209,45 @@ Example:
> };
> };
>
> + funnel {
> + /*
> + * non-configurable funnel don't show up on the AMBA
> + * bus. As such no need to add "arm,primecell".
> + */
> + compatible = "arm,coresight-static-funnel";
> + clocks = <&crg_ctrl HI3660_PCLK>;
> + clock-names = "apb_pclk";
> +
> + out-ports {
> + port {
> + combo_funnel_out: endpoint {
> + remote-endpoint = <&top_funnel_in>;
> + };
> + };
> + };
> +
> + in-ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + combo_funnel_in0: endpoint {
> + remote-endpoint = <&cluster0_etf_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + combo_funnel_in1: endpoint {
> + remote-endpoint = <&cluster1_etf_out>;
> + };
> + };
> + };
> + };
> +
> funnel@...40000 {
> - compatible = "arm,coresight-funnel", "arm,primecell";
> + compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> reg = <0 0x20040000 0 0x1000>;
>
> clocks = <&oscclk6a>;
> --
> 2.17.1
Same thing for this one.
>
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