linux/Documentation/devicetree/bindings/arm/arch_timer.txt
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   1* ARM architected timer
   2
   3ARM cores may have a per-core architected timer, which provides per-cpu timers.
   4
   5The timer is attached to a GIC to deliver its per-processor interrupts.
   6
   7** Timer node properties:
   8
   9- compatible : Should at least contain one of
  10        "arm,armv7-timer"
  11        "arm,armv8-timer"
  12
  13- interrupts : Interrupt list for secure, non-secure, virtual and
  14  hypervisor timers, in that order.
  15
  16- clock-frequency : The frequency of the main counter, in Hz. Optional.
  17
  18Example:
  19
  20        timer {
  21                compatible = "arm,cortex-a15-timer",
  22                             "arm,armv7-timer";
  23                interrupts = <1 13 0xf08>,
  24                             <1 14 0xf08>,
  25                             <1 11 0xf08>,
  26                             <1 10 0xf08>;
  27                clock-frequency = <100000000>;
  28        };
  29
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