Kernel-4.18.0-80.el8_brcm,bcm23550-cpu-metho

Broadcom Kona Family CPU Enable Method

This binding defines the enable method used for starting secondary
CPUs in the following Broadcom SoCs:
BCM23550

The enable method is specified by defining the following required
properties in the “cpu” device tree node:

• enable-method = “brcm,bcm23550”;
• secondary-boot-reg = <…>;

The secondary-boot-reg property is a u32 value that specifies the
physical address of the register used to request the ROM holding pen
code release a secondary CPU. The value written to the register is
formed by encoding the target CPU id into the low bits of the
physical start address it should jump to.

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

    cpu0: cpu@0 {
        device_type = "cpu";
        compatible = "arm,cortex-a9";
        reg = <0>;
    };

    cpu1: cpu@1 {
        device_type = "cpu";
        compatible = "arm,cortex-a9";
        reg = <1>;
        enable-method = "brcm,bcm23550";
        secondary-boot-reg = <0x3500417c>;
    };
};