linux-kernel - Re: [PATCH v2 2/2] dt-bindings: perf: starfive: Add StarLink PMU

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Date:   Wed, 15 Nov 2023 10:57:17 +0800
From:   Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
To:     <conor@...nel.org>
CC:     <conor+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <jisheng.teoh@...rfivetech.com>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <leyfoon.tan@...rfivetech.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <mark.rutland@....com>,
        <peterz@...radead.org>, <robh+dt@...nel.org>, <tglx@...utronix.de>,
        <will@...nel.org>
Subject: Re: [PATCH v2 2/2] dt-bindings: perf: starfive: Add StarLink PMU

On Tue, 14 Nov 2023 17:57:15 +0000
Conor Dooley <conor@...nel.org> wrote:

> On Tue, Nov 14, 2023 at 10:12:54AM +0800, Ji Sheng Teoh wrote:
> > Add device tree binding for StarFive's StarLink PMU (Performance
> > Monitor Unit).
> > 
> > Signed-off-by: Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
> > ---
> >  .../bindings/perf/starfive,starlink-pmu.yaml  | 46
> > +++++++++++++++++++ 1 file changed, 46 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
> > b/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
> > new file mode 100644 index 000000000000..b164f6849055 --- /dev/null
> > +++
> > b/Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml
> > @@ -0,0 +1,46 @@ +# SPDX-License-Identifier: GPL-2.0-only OR
> > BSD-2-Clause +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/perf/starfive,starlink-pmu.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: StarFive StarLink PMU
> > +
> > +maintainers:
> > +  - Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
> > +
> > +description:
> > +  StarFive's StarLink PMU integrates one or more CPU cores with a
> > shared L3
> > +  memory system. The PMU support overflow interrupt, up to 16
> > programmable
> > +  64bit event counters, and an independent 64bit cycle counter.
> > +  StarLink PMU is accessed via MMIO.
> > +
> > +properties:
> > +  compatible:
> > +    const: starfive,starlink-pmu  
> 
> This compatible (in isolation) is far too generic. Please add a device
> specific compatible for the device that has this PMU.
> 
> Thanks,
> Conor.

Thanks Conor, I will fix that in v3.

> 
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    soc {
> > +        #address-cells = <2>;
> > +        #size-cells = <2>;
> > +
> > +        l3_pmu: pmu@...00000 {
> > +            compatible = "starfive,starlink-pmu";
> > +            reg = <0x0 0x12900000 0x0 0x10000>;
> > +            interrupts = <34>;
> > +        };
> > +    };
> > -- 
> > 2.25.1
> >