Re: [PATCH v4 4/4] dt-binding: perf: Add Amlogic DDR PMU

[Jiucheng Xu]

On 2022/8/5 18:00, Jiucheng Xu wrote:
> 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@xxxxxxxxxxx>
> > > ---
> > > 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@xxxxxxxxxxx>
> > > +
> > > +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".

Hi Krzysztof,

I have tried to remove "items", but error comes.

properties:
  compatible:
    - enum:
      - amlogic,g12a-ddr-pmu
      - amlogic,g12b-ddr-pmu
      - amlogic,sm1-ddr-pmu

Do I get misunderstand? I think the "item" is necessary.

> > > +      - 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@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