arm64: tegra: Add PMU on Tegra210

The NVIDIA Tegra210 contains an ARM PMU v3 that can be used to gather
statistics about the processors and their memory system. Add a device
tree node so that this functionality can be exposed.

Reported-by: William Cohen <giantklein@gmail.com>
Tested-by: William Cohen <giantklein@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index aac7f3efee167c402fe3407902c456f979e37543..7832a3ea79c8d0977748bff93fceac2db706cdc1 100644 (file)
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -1439,6 +1439,16 @@ L2: l2-cache {
                };
        };
 
+       pmu {
+               compatible = "arm,armv8-pmuv3";
+               interrupts = <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>,
+                            <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>,
+                            <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>,
+                            <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>;
+               interrupt-affinity = <&{/cpus/cpu@0} &{/cpus/cpu@1}
+                                     &{/cpus/cpu@2} &{/cpus/cpu@3}>;
+       };
+
        timer {
                compatible = "arm,armv8-timer";
                interrupts = <GIC_PPI 13