Messages in this thread Patch in this message |  | | From | Lukasz Luba <> | Subject | [PATCH v2 3/4] Documentation: devicetree: add PPMU events description | Date | Thu, 18 Apr 2019 15:38:31 +0200 |
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Extend the documenation by events description with new 'event-data-type' field. Add example how the event might be defined in DT.
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> --- .../devicetree/bindings/devfreq/event/exynos-ppmu.txt | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt index 3e36c1d..47feb5f 100644 --- a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt +++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt @@ -145,3 +145,21 @@ Example3 : PPMUv2 nodes in exynos5433.dtsi are listed below. reg = <0x104d0000 0x2000>; status = "disabled"; }; + +The 'event' type specified in the PPMU node defines 'event-name' +which also contains 'id' number and optionally 'event-data-type'. + +Example: + + events { + ppmu_leftbus_0: ppmu-event0-leftbus { + event-name = "ppmu-event0-leftbus"; + event-data-type = <PPMU_RO_DATA_CNT>; + }; + }; + +The 'event-data-type' defines the type of data which shell be counted +by the counter. You can check include/dt-bindings/pmu/exynos_ppmu.h for +all possible type, i.e. count read requests, count write data in bytes, +etc. This field is optional and when it is missing, the driver code will +use default data type. -- 2.7.4
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