1Generic cpufreq driver
2
3It is a generic DT based cpufreq driver for frequency management.  It supports
4both uniprocessor (UP) and symmetric multiprocessor (SMP) systems which share
5clock and voltage across all CPUs.
6
7Both required and optional properties listed below must be defined
8under node /cpus/cpu@0.
9
10Required properties:
11- None
12
13Optional properties:
14- operating-points: Refer to Documentation/devicetree/bindings/opp/opp.txt for
15  details. OPPs *must* be supplied either via DT, i.e. this property, or
16  populated at runtime.
17- clock-latency: Specify the possible maximum transition latency for clock,
18  in unit of nanoseconds.
19- voltage-tolerance: Specify the CPU voltage tolerance in percentage.
20- #cooling-cells:
21     Please refer to Documentation/devicetree/bindings/thermal/thermal.txt.
22
23Examples:
24
25cpus {
26	#address-cells = <1>;
27	#size-cells = <0>;
28
29	cpu@0 {
30		compatible = "arm,cortex-a9";
31		reg = <0>;
32		next-level-cache = <&L2>;
33		operating-points = <
34			/* kHz    uV */
35			792000  1100000
36			396000  950000
37			198000  850000
38		>;
39		clock-latency = <61036>; /* two CLK32 periods */
40		#cooling-cells = <2>;
41	};
42
43	cpu@1 {
44		compatible = "arm,cortex-a9";
45		reg = <1>;
46		next-level-cache = <&L2>;
47	};
48
49	cpu@2 {
50		compatible = "arm,cortex-a9";
51		reg = <2>;
52		next-level-cache = <&L2>;
53	};
54
55	cpu@3 {
56		compatible = "arm,cortex-a9";
57		reg = <3>;
58		next-level-cache = <&L2>;
59	};
60};
61