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authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-19 11:44:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-19 11:44:15 -0800
commitdec8e46178bad9f1717a948572d76e0f804be801 (patch)
treed0feaa9474f4406cb220cccdb7d39a3d031f00a6 /Documentation
parent806dace637e4d37a5569c3e2345adcbd473b3d12 (diff)
parentcd5dfd0e1685530cb3159dec2d2a95421104093d (diff)
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Merge tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull second set of ARC changes from Vineet Gupta: - Support for Perf from Mischa - Enabling GPIO/Pinctrl drivers for Abilis TB10x platform - New defconfig for buildroot * tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-arcfpga] Add defconfig without initramfs location ARC: perf: ARC 700 PMU doesn't support sampling events ARC: Add documentation on DT binding for ARC700 PMU ARC: Add perf support for ARC700 cores ARC: [TB10x] Updates for GPIO and pinctrl
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/arc/pmu.txt24
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diff --git a/Documentation/devicetree/bindings/arc/pmu.txt b/Documentation/devicetree/bindings/arc/pmu.txt
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+* 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";
+};