Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / arm / kirkwood.txt

diff --git a/kernel/Documentation/devicetree/bindings/arm/kirkwood.txt b/kernel/Documentation/devicetree/bindings/arm/kirkwood.txt
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+Marvell Kirkwood Platforms Device Tree Bindings
+-----------------------------------------------
+
+Boards with a SoC of the Marvell Kirkwood
+shall have the following property:
+
+Required root node property:
+
+compatible: must contain "marvell,kirkwood";
+
+In order to support the kirkwood cpufreq driver, there must be a node
+cpus/cpu@0 with three clocks, "cpu_clk", "ddrclk" and "powersave",
+where the "powersave" clock is a gating clock used to switch the CPU
+between the "cpu_clk" and the "ddrclk".
+
+Example:
+
+       cpus {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               cpu@0 {
+                     device_type = "cpu";
+                     compatible = "marvell,sheeva-88SV131";
+                     clocks = <&core_clk 1>, <&core_clk 3>, <&gate_clk 11>;
+                     clock-names = "cpu_clk", "ddrclk", "powersave";
+               };