[PATCH] arm64: dts: morello: Add CMN PMU

[Robin Murphy]

[ Trying to catch up with loose ends... ]

On 2025-05-27 1:55 pm, Robin Murphy wrote:
> Although CMN-Skeena is mildly modified for the Morello hardware
> architecture, it still identifies itself as CMN-600 r3p1. Since
> there are also no documented changes to its PMU functionality,
> we can make the PMU accessible via the standard CMN-600 binding.
> In general, PMU registers are non-functional on CMN Fast Models,
> so this is only meaningful for the real SDP hardware.

Vincenzo, Sudeep, any opinion on this? I believe it was considered 
useful by at least the one person who asked me about it :)

Thanks,
Robin.

> 
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>
> ---
>   arch/arm64/boot/dts/arm/morello-sdp.dts | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/arm/morello-sdp.dts b/arch/arm64/boot/dts/arm/morello-sdp.dts
> index cee49dee7571..42c85f450fa9 100644
> --- a/arch/arm64/boot/dts/arm/morello-sdp.dts
> +++ b/arch/arm64/boot/dts/arm/morello-sdp.dts
> @@ -108,6 +108,13 @@ smmu_pcie: iommu at 4f400000 {
>   		dma-coherent;
>   	};
>   
> +	pmu at 50000000 {
> +		compatible = "arm,cmn-600";
> +		reg = <0x0 0x50000000 0x0 0x4000000>;
> +		interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
> +		arm,root-node = <0x804000>;
> +	};
> +
>   	pcie_ctlr: pcie at 28c0000000 {
>   		device_type = "pci";
>   		compatible = "pci-host-ecam-generic";