From d6a7f73db712a11b1c30b2566758de65b308da73 Mon Sep 17 00:00:00 2001 From: Mischa Jonker Date: Thu, 7 Nov 2013 14:55:12 +0100 Subject: ARC: Add documentation on DT binding for ARC700 PMU Signed-off-by: Mischa Jonker Acked-by: Mark Rutland Signed-off-by: Vineet Gupta --- Documentation/devicetree/bindings/arc/pmu.txt | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/devicetree/bindings/arc/pmu.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/arc/pmu.txt b/Documentation/devicetree/bindings/arc/pmu.txt new file mode 100644 index 0000000..49d5173 --- /dev/null +++ b/Documentation/devicetree/bindings/arc/pmu.txt @@ -0,0 +1,24 @@ +* ARC Performance Monitor Unit + +The ARC 700 can be configured with a pipeline performance monitor for counting +CPU and cache events like cache misses and hits. + +Note that: + * ARC 700 refers to a family of ARC processor cores; + - There is only one type of PMU available for the whole family; + - The PMU may support different sets of events; supported events are probed + at boot time, as required by the reference manual. + + * The ARC 700 PMU does not support interrupts; although HW events may be + counted, the HW events themselves cannot serve as a trigger for a sample. + +Required properties: + +- compatible : should contain + "snps,arc700-pmu" + +Example: + +pmu { + compatible = "snps,arc700-pmu"; +}; -- cgit v1.1