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

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Date:   Thu, 28 Jul 2022 17:50:00 +0800
From:   Jiucheng Xu <jiucheng.xu@...ogic.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <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 2022/7/27 15:09, Krzysztof Kozlowski wrote:
> [ EXTERNAL EMAIL ]
>
> 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
Thanks for your comments. Once I thought the example DTB got generated 
means the yaml file is ok. I will learn the writing-schema. rst doc and 
modify the binding doc as your comments.

-- 
Thanks,
Jiucheng