xref: /freebsd/sys/contrib/device-tree/Bindings/cpufreq/cpufreq-spear.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)

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 >;
	};

	<...>

};