<commit_before>* ARM Performance Monitor Units

ARM cores often have a PMU for counting cpu and cache events like cache misses
and hits. The interface to the PMU is part of the ARM ARM. The ARM PMU
representation in the device tree should be done as under:-

Required properties:

- compatible : should be one of
	"arm,armv8-pmuv3"
	"arm,cortex-a17-pmu"
	"arm,cortex-a15-pmu"
	"arm,cortex-a12-pmu"
	"arm,cortex-a9-pmu"
	"arm,cortex-a8-pmu"
	"arm,cortex-a7-pmu"
	"arm,cortex-a5-pmu"
	"arm,arm11mpcore-pmu"
	"arm,arm1176-pmu"
	"arm,arm1136-pmu"
	"qcom,krait-pmu"
- interrupts : 1 combined interrupt or 1 per core. If the interrupt is a per-cpu
               interrupt (PPI) then 1 interrupt should be specified.

Optional properties:

- qcom,no-pc-write : Indicates that this PMU doesn't support the 0xc and 0xd
                     events.

Example:

pmu {
        compatible = "arm,cortex-a9-pmu";
        interrupts = <100 101>;
};<commit_msg>dt: pmu: extend ARM PMU binding to allow for explicit interrupt affinity<commit_after>* ARM Performance Monitor Units

ARM cores often have a PMU for counting cpu and cache events like cache misses
and hits. The interface to the PMU is part of the ARM ARM. The ARM PMU
representation in the device tree should be done as under:-

Required properties:

- compatible : should be one of
	"arm,armv8-pmuv3"
	"arm,cortex-a17-pmu"
	"arm,cortex-a15-pmu"
	"arm,cortex-a12-pmu"
	"arm,cortex-a9-pmu"
	"arm,cortex-a8-pmu"
	"arm,cortex-a7-pmu"
	"arm,cortex-a5-pmu"
	"arm,arm11mpcore-pmu"
	"arm,arm1176-pmu"
	"arm,arm1136-pmu"
	"qcom,krait-pmu"
- interrupts : 1 combined interrupt or 1 per core. If the interrupt is a per-cpu
               interrupt (PPI) then 1 interrupt should be specified.

Optional properties:

- interrupt-affinity : Valid only when using SPIs, specifies a list of phandles
                       to CPU nodes corresponding directly to the affinity of
		       the SPIs listed in the interrupts property.

		       This property should be present when there is more than
		       a single SPI.

- qcom,no-pc-write : Indicates that this PMU doesn't support the 0xc and 0xd
                     events.

Example:

pmu {
        compatible = "arm,cortex-a9-pmu";
        interrupts = <100 101>;
};
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