Kernel-4.18.0-80.el8_octeon-usb

OCTEON/OCTEON+ USB BLOCK

1. Main node

   Required properties:

   • compatible: must be “cavium,octeon-5750-usbn”

   • reg: specifies the physical base address of the USBN block and
     the length of the memory mapped region.

   • #address-cells: specifies the number of cells needed to encode an
     address. The value must be 2.

   • #size-cells: specifies the number of cells used to represent the size
     of an address. The value must be 2.

   • ranges: specifies the translation between child address space and parent
     address space.

   • clock-frequency: speed of the USB reference clock. Allowed values are
     12000000, 24000000 or 48000000.

   • cavium,refclk-type: type of the USB reference clock. Allowed values are
     “crystal” or “external”.

   • refclk-frequency: deprecated, use “clock-frequency”.

   • refclk-type: deprecated, use “cavium,refclk-type”.

2. Child node

   The main node must have one child node which describes the built-in
   USB controller.

   Required properties:

   • compatible: must be “cavium,octeon-5750-usbc”

   • reg: specifies the physical base address of the USBC block and
     the length of the memory mapped region.

   • interrupts: specifies the interrupt number for the USB controller.

3. Example:

   usbn: usbn@1180068000000 {

    compatible = "cavium,octeon-5750-usbn";
    reg = <0x11800 0x68000000 0x0 0x1000>;
    ranges; /* Direct mapping */
    #address-cells = <2>;
    #size-cells = <2>;
    clock-frequency = <12000000>;
    cavium,refclk-type = "crystal";
   
    usbc@16f0010000000 {
        compatible = "cavium,octeon-5750-usbc";
        reg = <0x16f00 0x10000000 0x0 0x80000>;
        interrupts = <0 56>;
    };
   

   };