Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / power / opp.txt

diff --git a/kernel/Documentation/devicetree/bindings/power/opp.txt b/kernel/Documentation/devicetree/bindings/power/opp.txt
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+* Generic OPP Interface
+
+SoCs have a standard set of tuples consisting of frequency and
+voltage pairs that the device will support per voltage domain. These
+are called Operating Performance Points or OPPs.
+
+Properties:
+- operating-points: An array of 2-tuples items, and each item consists
+  of frequency and voltage like <freq-kHz vol-uV>.
+       freq: clock frequency in kHz
+       vol: voltage in microvolt
+
+Examples:
+
+cpu@0 {
+       compatible = "arm,cortex-a9";
+       reg = <0>;
+       next-level-cache = <&L2>;
+       operating-points = <
+               /* kHz    uV */
+               792000  1100000
+               396000  950000
+               198000  850000
+       >;
+};