linux-kernel - Re: [PATCH v2 4/4] dt-binding: perf: Add Amlogic DDR PMU

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Message-ID: <a45957f9-bb51-8774-8f2f-675fd8314698@linaro.org>
Date:   Wed, 27 Jul 2022 09:09:34 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jiucheng Xu <jiucheng.xu@...ogic.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, devicetree@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Chris Healy <cphealy@...il.com>
Subject: Re: [PATCH v2 4/4] dt-binding: perf: Add Amlogic DDR PMU

On 27/07/2022 01:03, Jiucheng Xu wrote:
> Add binding documentation for the Amlogic G12 series DDR
> performance monitor unit.
> 
> Signed-off-by: Jiucheng Xu <jiucheng.xu@...ogic.com>
> ---
> Changes v1 -> v2:
>   - Rename file, from aml_ddr_pmu.yaml to amlogic,g12_ddr_pmu.yaml
>   - Delete "model", "dmc_nr", "chann_nr" new properties
>   - Fix compiling error
> ---
>  .../bindings/perf/amlogic,g12_ddr_pmu.yaml    | 45 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/perf/amlogic,g12_ddr_pmu.yaml

Does not look like you tested the bindings. Please run `make
dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).

> 
> diff --git a/Documentation/devicetree/bindings/perf/amlogic,g12_ddr_pmu.yaml b/Documentation/devicetree/bindings/perf/amlogic,g12_ddr_pmu.yaml
> new file mode 100644
> index 000000000000..46ef52b61492
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/perf/amlogic,g12_ddr_pmu.yaml
> @@ -0,0 +1,45 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/perf/amlogic,g12-ddr-pmu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Amlogic G12 DDR performance monitor
> +
> +maintainers:
> +  - Jiucheng Xu <jiucheng.xu@...ogic.com>
> +
> +properties:
> +  compatible:
> +    oneOf:

That's not oneOf...

> +      - items:
> +          - enum:
> +              - amlogic,g12b-ddr-pmu
> +                amlogic,g12a-ddr-pmu
> +                amlogic,sm1-ddr-pmu
> +          - const: amlogic,g12-ddr-pmu
> +
> +  reg:
> +    maxItems: 2

You need to list and describe the items.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    ddr_pmu: ddr_pmu {
> +
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>

Code looks terrible...

> +
> +        compatible = "amlogic,g12a-ddr-pmu";
> +        reg = <0x0 0xff638000 0x0 0x100
> +               0x0 0xff638c00 0x0 0x100>;

That's one item. You need to separate regs.



Best regards,
Krzysztof