Kernel-3.10.0-957.el7_arm_big_little_dt

Generic ARM big LITTLE cpufreq driver’s DT glue

This is DT specific glue layer for generic cpufreq driver for big LITTLE
systems.

Both required and optional properties listed below must be defined
under node /cpus/cpu@x. Where x is the first cpu inside a cluster.

FIXME: Cpus should boot in the order specified in DT and all cpus for a cluster
must be present contiguously. Generic DT driver will check only node ‘x’ for
cpu:x.

Required properties:

• operating-points: Refer to Documentation/devicetree/bindings/power/opp.txt
  for details

Optional properties:

• clock-latency: Specify the possible maximum transition latency for clock,
  in unit of nanoseconds.

Examples:

cpus {
#address-cells = <1>;
#size-cells = <0>;

cpu@0 {
    compatible = "arm,cortex-a15";
    reg = <0>;
    next-level-cache = <&L2>;
    operating-points = <
        /* kHz    uV */
        792000  1100000
        396000  950000
        198000  850000
    >;
    clock-latency = <61036>; /* two CLK32 periods */
};

cpu@1 {
    compatible = "arm,cortex-a15";
    reg = <1>;
    next-level-cache = <&L2>;
};

cpu@100 {
    compatible = "arm,cortex-a7";
    reg = <100>;
    next-level-cache = <&L2>;
    operating-points = <
        /* kHz    uV */
        792000  950000
        396000  750000
        198000  450000
    >;
    clock-latency = <61036>; /* two CLK32 periods */
};

cpu@101 {
    compatible = "arm,cortex-a7";
    reg = <101>;
    next-level-cache = <&L2>;
};

};