linux-kernel - Re: [PATCH v4 2/2] dt-bindings: perf: Add YAML schemas for Marvell CN10K LLC-TAD pmu bindings

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Message-ID: <YTeuQvMoFOeY0FeJ@robh.at.kernel.org>
Date:   Tue, 7 Sep 2021 13:24:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     Bhaskara Budiredla <bbudiredla@...vell.com>
Cc:     will@...nel.org, mark.rutland@....com, sgoutham@...vell.com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] dt-bindings: perf: Add YAML schemas for Marvell
 CN10K LLC-TAD pmu bindings

On Wed, Sep 01, 2021 at 08:31:05PM +0530, Bhaskara Budiredla wrote:
> Add device tree bindings for Last-level-cache Tag-and-data
> (LLC-TAD) unit PMU for Marvell CN10K SoCs.
> 
> Signed-off-by: Bhaskara Budiredla <bbudiredla@...vell.com>
> ---
>  .../bindings/perf/marvell-cn10k-tad.yaml      | 60 +++++++++++++++++++

marvell,cn10k-tad-pmu.yaml

>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/perf/marvell-cn10k-tad.yaml
> 
> diff --git a/Documentation/devicetree/bindings/perf/marvell-cn10k-tad.yaml b/Documentation/devicetree/bindings/perf/marvell-cn10k-tad.yaml
> new file mode 100644
> index 000000000000..18e9499f2df8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/perf/marvell-cn10k-tad.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/perf/marvell-cn10k-tad.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell CN10K LLC-TAD performance monitor
> +
> +maintainers:
> +  - Bhaskara Budiredla <bbudiredla@...vell.com>
> +
> +description: |
> +  The Tag-and-Data units (TADs) maintain coherence and contain CN10K
> +  shared on-chip last level cache (LLC). The tad pmu measures the
> +  performance of last-level cache. Each tad pmu supports up to eight
> +  counters.
> +
> +  The DT setup comprises of number of tad blocks, the sizes of pmu
> +  regions, tad blocks and overall base address of the HW.
> +
> +properties:
> +  compatible:
> +    const: marvell,cn10k-tad-pmu
> +

> +  tad-cnt:
> +    maxItems: 1
> +
> +  tad-page-size:
> +    maxItems: 1
> +
> +  tad-pmu-page-size:
> +    maxItems: 1

These all need vendor prefix, a type, description, and any constraints.

> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - tad-cnt
> +  - tad-page-size
> +  - tad-pmu-page-size
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +
> +    tad {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        tad_pmu@...00000 {

pmu@...

> +            compatible = "marvell,cn10k-tad-pmu";
> +            tad-cnt = <1>;
> +            tad-page-size = <0x1000>;
> +            tad-pmu-page-size = <0x1000>;
> +            reg = <0x87e2 0x80000000 0x0 0x1000>;
> +        };
> +    };
> -- 
> 2.17.1
> 
>