[PATCH v4 4/4] dt-binding: perf: Add Amlogic DDR PMU
Jiucheng Xu
jiucheng.xu at amlogic.com
Fri Aug 5 03:00:37 PDT 2022
On 2022/8/5 16:21, Krzysztof Kozlowski wrote:
> [ EXTERNAL EMAIL ]
>
> On 05/08/2022 09:14, Jiucheng Xu wrote:
>> Add binding documentation for the Amlogic G12 series DDR
>> performance monitor unit.
>>
> Bindings go first in the series, before their implementation.
>
>> Signed-off-by: Jiucheng Xu <jiucheng.xu at amlogic.com>
>> ---
>> Changes v3 -> v4:
>> - Fix "$id: relative path/filename doesn't match actual path or
>> filename" warning
>>
>> Changes v2 -> v3:
>> - Remove oneOf
>> - Add descriptions
>> - Fix compiling warning
>>
>> Changes v1 -> v2:
>> - Rename file, from aml_ddr_pmu.yaml to amlogic,g12_ddr_pmu.yaml
>> - Delete "model", "dmc_nr", "chann_nr" new properties
>> - Fix compiling error
>> ---
>> .../bindings/perf/amlogic,g12-ddr-pmu.yaml | 52 +++++++++++++++++++
>> MAINTAINERS | 1 +
>> 2 files changed, 53 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
>> new file mode 100644
>> index 000000000000..4d018574ffd1
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
>> @@ -0,0 +1,52 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$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 at amlogic.com>
>> +
>> +description: |
>> + Amlogic G12 series SoC integrate DDR bandwidth monitor.
>> + A timer is inside and can generate interrupt when timeout.
>> + The bandwidth is counted in the timer ISR. Different platform
>> + has different subset of event format attribute.
>> +
>> +properties:
>> + compatible:
>> + items:
> You have only one item, so remove "items".
>
>> + - enum:
>> + - amlogic,g12b-ddr-pmu
>> + - amlogic,g12a-ddr-pmu
>> + - amlogic,sm1-ddr-pmu
>> +
>> + reg:
>> + items:
>> + - description: Physical address of DMC bandwidth register
>> + and size of the configuration address space.
> Skip obvious pieces, so only:
>
> description: DMC bandwidth register space
>
>> + - description: Physical address of DMC PLL register and
>> + size of the configuration address space.
> description: DMC PLL bandwidth register space
>
>
>> +
>> + interrupts:
>> + items:
>> + - description: The IRQ of the inside timer timeout.
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - interrupts
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/arm-gic.h>
>> + ddr_pmu at ff638000 {
> No underscores in node names, generic node names, so just "pmu".
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
>
>> + compatible = "amlogic,g12a-ddr-pmu";
>> + reg = <0xff638000 0x100
>> + 0xff638c00 0x100>;
> This is still not fixed. Binding says you have two items, but you
> declared here only one item.
Okay, I will change it as your comments.
> Best regards,
> Krzysztof
>
--
Thanks,
Jiucheng
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