# Re: \[PATCH\] arm64: dts: allwinner: a64: Drop PMU node

- From: Emmanuel Vadot \<hidden\>
- Date: 2019-08-06 19:10:07 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2019/08/8170946
- Thread: https://ratatoskr.run/linux-devicetree/2019/08/8170921/t.md

```text
On Tue,  6 Aug 2019 07:01:35 -0700
Vasily Khoruzhick [ref] wrote:

> Looks like PMU in A64 is broken, it generates no interrupts at all and
> as result 'perf top' shows no events.
> 
> Tested on Pine64-LTS.
> 
> Fixes: 34a97fcc71c2 ("arm64: dts: allwinner: a64: Add PMU node")
> Cc: Harald Geyer <redacted>
> Cc: Jared D. McNeill <redacted>
> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
> ---
>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 9 ---------
>  1 file changed, 9 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> index 9cc9bdde81ac..cd92f546c483 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> @@ -142,15 +142,6 @@
>  		clock-output-names = "ext-osc32k";
>  	};
>  
> -	pmu {
> -		compatible = "arm,cortex-a53-pmu";
> -		interrupts = <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>,
> -			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
> -			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>,
> -			     <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
> -		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
> -	};
> -
>  	psci {
>  		compatible = "arm,psci-0.2";
>  		method = "smc";
> -- 
> 2.22.0

 It doesn't work for me too on FreeBSD, and yes the interrupts are
wrong but this is not the problem. Maybe there is a reset line but it's
not documented in the documentation.

 Reviewed-by: Emmanuel Vadot [ref]

-- 
Emmanuel Vadot [ref] [ref]

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