On Thu, 17 May 2018, Eric Anholt wrote:

> diff --git a/arch/arm/boot/dts/bcm2837.dtsi b/arch/arm/boot/dts/bcm2837.dtsi
> index 7704bb029605..1f5e5c782835 100644
> --- a/arch/arm/boot/dts/bcm2837.dtsi
> +++ b/arch/arm/boot/dts/bcm2837.dtsi
> @@ -17,6 +17,12 @@
>               };
>       };
>  
> +     arm-pmu {
> +             compatible = "arm,cortex-a53-pmu", "arm,cortex-a7-pmu";
> +             interrupt-parent = <&local_intc>;
> +             interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
> +     };
> +

why this and not

arm-pmu {
        compatible = "arm,armv8-pmuv3";
        interrupt-parent = <&local_intc>;
        interrupts = <9>;
};

which works, though when I didn't get very far when I submitted the patch 
to add this last August.

Vince

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