linux/Documentation/devicetree/bindings/arm/kirkwood.txt
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   1Marvell Kirkwood Platforms Device Tree Bindings
   2-----------------------------------------------
   3
   4Boards with a SoC of the Marvell Kirkwood
   5shall have the following property:
   6
   7Required root node property:
   8
   9compatible: must contain "marvell,kirkwood";
  10
  11In order to support the kirkwood cpufreq driver, there must be a node
  12cpus/cpu@0 with three clocks, "cpu_clk", "ddrclk" and "powersave",
  13where the "powersave" clock is a gating clock used to switch the CPU
  14between the "cpu_clk" and the "ddrclk".
  15
  16Example:
  17
  18        cpus {
  19                #address-cells = <1>;
  20                #size-cells = <0>;
  21
  22                cpu@0 {
  23                      device_type = "cpu";
  24                      compatible = "marvell,sheeva-88SV131";
  25                      clocks = <&core_clk 1>, <&core_clk 3>, <&gate_clk 11>;
  26                      clock-names = "cpu_clk", "ddrclk", "powersave";
  27                };
  28