2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
linux-next/Documentation/devicetree/bindings/arm/pmu.txt
Will Deacon 03eff46ce3 ARM: 8054/1: perf: add support for the Cortex-A17 PMU
The Cortex-A17 PMU is identical to that of the A12, so wire up a new
compatible string to the existing event structures.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-05-25 23:49:43 +01:00

36 lines
919 B
Plaintext

* 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>;
};