[PATCH v3 2/2] ARC: Add documentation on DT binding for ARC700 PMU

Mischa Jonker
2013-11-07T13:55:39Z

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
---
Documentation/devicetree/bindings/arc/pmu.txt | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arc/pmu.txt

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";
+};
--
1.7.9.5