FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/cpufreq/cpufreq-spear.txt

     SPEAr cpufreq driver
     -------------------
     
     SPEAr SoC cpufreq driver for CPU frequency scaling.
     It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) systems
     which share clock across all CPUs.
     
     Required properties:
     - cpufreq_tbl: Table of frequencies CPU could be transitioned into, in the
      increasing order.
    
    Optional properties:
    - clock-latency: Specify the possible maximum transition latency for clock, in
      unit of nanoseconds.
    
    Both required and optional properties listed above must be defined under node
    /cpus/cpu@0.
    
    Examples:
    --------
    cpus {
    
            <...>
    
            cpu@0 {
                    compatible = "arm,cortex-a9";
                    reg = <0>;
    
                    <...>
    
                    cpufreq_tbl = < 166000
                                    200000
                                    250000
                                    300000
                                    400000
                                    500000
                                    600000 >;
            };
    
            <...>
    
    };

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