Kernel-4.18.0-80.el8_brcm,bcm7445-switch-v4.0

• Broadcom Starfighter 2 integrated swich

Required properties:

• compatible: should be one of
  “brcm,bcm7445-switch-v4.0”
  “brcm,bcm7278-switch-v4.0”
  “brcm,bcm7278-switch-v4.8”
• reg: addresses and length of the register sets for the device, must be 6
  pairs of register addresses and lengths
• interrupts: interrupts for the devices, must be two interrupts
• #address-cells: must be 1, see dsa/dsa.txt
• #size-cells: must be 0, see dsa/dsa.txt

Deprecated binding required properties:

• dsa,mii-bus: phandle to the MDIO bus controller, see dsa/dsa.txt
• dsa,ethernet: phandle to the CPU network interface controller, see dsa/dsa.txt
• #address-cells: must be 2, see dsa/dsa.txt

Subnodes:

The integrated switch subnode should be specified according to the binding
described in dsa/dsa.txt.

Optional properties:

• reg-names: litteral names for the device base register addresses, when present
  must be: “core”, “reg”, “intrl2_0”, “intrl2_1”, “fcb”, “acb”

• interrupt-names: litternal names for the device interrupt lines, when present
  must be: “switch_0” and “switch_1”

• brcm,num-gphy: specify the maximum number of integrated gigabit PHYs in the
  switch

• brcm,num-rgmii-ports: specify the maximum number of RGMII interfaces supported
  by the switch

• brcm,fcb-pause-override: boolean property, if present indicates that the switch
  supports Failover Control Block pause override capability

• brcm,acb-packets-inflight: boolean property, if present indicates that the switch
  Admission Control Block supports reporting the number of packets in-flight in a
  switch queue

Port subnodes:

Optional properties:

• brcm,use-bcm-hdr: boolean property, if present, indicates that the switch
  port has Broadcom tags enabled (per-packet metadata)

Example:

switch_top@f0b00000 {
compatible = “simple-bus”;
#size-cells = <1>;
#address-cells = <1>;
ranges = <0 0xf0b00000 0x40804>;

ethernet_switch@0 {
    compatible = "brcm,bcm7445-switch-v4.0";
    #size-cells = <0>;
    #address-cells = <1>;
    reg = <0x0 0x40000
        0x40000 0x110
        0x40340 0x30
        0x40380 0x30
        0x40400 0x34
        0x40600 0x208>;
    reg-names = "core", "reg", intrl2_0", "intrl2_1",
            "fcb, "acb";
    interrupts = <0 0x18 0
            0 0x19 0>;
    brcm,num-gphy = <1>;
    brcm,num-rgmii-ports = <2>;
    brcm,fcb-pause-override;
    brcm,acb-packets-inflight;

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

        port@0 {
            label = "gphy";
            reg = <0>;
        };
    };
};

};

Example using the old DSA DeviceTree binding:

switch_top@f0b00000 {
compatible = “simple-bus”;
#size-cells = <1>;
#address-cells = <1>;
ranges = <0 0xf0b00000 0x40804>;

ethernet_switch@0 {
    compatible = "brcm,bcm7445-switch-v4.0";
    #size-cells = <0>;
    #address-cells = <2>;
    reg = <0x0 0x40000
        0x40000 0x110
        0x40340 0x30
        0x40380 0x30
        0x40400 0x34
        0x40600 0x208>;
    interrupts = <0 0x18 0
            0 0x19 0>;
    brcm,num-gphy = <1>;
    brcm,num-rgmii-ports = <2>;
    brcm,fcb-pause-override;
    brcm,acb-packets-inflight;

    ...
    switch@0 {
        reg = <0 0>;
        #size-cells = <0>;
        #address-cells <1>;

        port@0 {
            label = "gphy";
            reg = <0>;
            brcm,use-bcm-hdr;
        };
        ...
    };
};

};