kernel/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt

   1 SPEAr cpufreq driver
   2 -------------------
   3
   4 SPEAr SoC cpufreq driver for CPU frequency scaling.
   5 It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) systems
   6 which share clock across all CPUs.
   7
   8 Required properties:
   9 - cpufreq_tbl: Table of frequencies CPU could be transitioned into, in the
  10   increasing order.
  11
  12 Optional properties:
  13 - clock-latency: Specify the possible maximum transition latency for clock, in
  14   unit of nanoseconds.
  15
  16 Both required and optional properties listed above must be defined under node
  17 /cpus/cpu@0.
  18
  19 Examples:
  20 --------
  21 cpus {
  22
  23         <...>
  24
  25         cpu@0 {
  26                 compatible = "arm,cortex-a9";
  27                 reg = <0>;
  28
  29                 <...>
  30
  31                 cpufreq_tbl = < 166000
  32                                 200000
  33                                 250000
  34                                 300000
  35                                 400000
  36                                 500000
  37                                 600000 >;
  38         };
  39
  40         <...>
  41
  42 };