On a mamba I am still seeing FS#2091:
root@bsaedgy:~# dmesg|grep -i usb
[ 0.029173] usbcore: registered new interface driver usbfs
[ 0.029220] usbcore: registered new interface driver hub
[ 0.029268] usbcore: registered new device driver usb
[ 1.168917] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.184949] orion-ehci f1050000.usb: EHCI Host Controller
[ 1.190401] orion-ehci f1050000.usb: new USB bus registered, assigned bus number 1
[ 1.198061] orion-ehci f1050000.usb: irq 25, io mem 0xf1050000
[ 1.230342] orion-ehci f1050000.usb: USB 2.0 started, EHCI 1.00
[ 1.236671] hub 1-0:1.0: USB hub found
[ 1.245012] usbcore: registered new interface driver usb-storage
[ 11.932138] usbcore: registered new interface driver btusb
root@bsaedgy:~#
root@bsaedgy:~# lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=orion-ehci/1p, 480M
root@bsaedgy:~# uname -a
Linux bsaedgy 4.19.44 #0 SMP Fri May 24 14:47:50 2019 armv7l GNU/Linux
On a rango things appear to be found:
root@bsaedgy:~# dmesg | grep -i usb
[ 0.010159] usbcore: registered new interface driver usbfs
[ 0.010185] usbcore: registered new interface driver hub
[ 0.010209] usbcore: registered new device driver usb
[ 1.125304] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.141284] orion-ehci f1058000.usb: EHCI Host Controller
[ 1.146718] orion-ehci f1058000.usb: new USB bus registered, assigned bus number 1
[ 1.154365] orion-ehci f1058000.usb: irq 38, io mem 0xf1058000
[ 1.180763] orion-ehci f1058000.usb: USB 2.0 started, EHCI 1.00
[ 1.186897] hub 1-0:1.0: USB hub found
[ 1.195022] usbcore: registered new interface driver usb-storage
[ 1.302173] usb_phy_generic usb3_1-phy: Linked as a consumer to regulator.1
[ 1.309312] xhci-hcd f10f8000.usb3: xHCI Host Controller
[ 1.314684] xhci-hcd f10f8000.usb3: new USB bus registered, assigned bus number 2
[ 1.322261] xhci-hcd f10f8000.usb3: hcc params 0x0a000990 hci version 0x100 quirks 0x0000000000010010
[ 1.336916] xhci-hcd f10f8000.usb3: irq 44, io mem 0xf10f8000
[ 1.348421] hub 2-0:1.0: USB hub found
[ 1.356270] xhci-hcd f10f8000.usb3: xHCI Host Controller
[ 1.361636] xhci-hcd f10f8000.usb3: new USB bus registered, assigned bus number 3
[ 1.369162] xhci-hcd f10f8000.usb3: Host supports USB 3.0 SuperSpeed
[ 1.375668] usb usb3: We don't know the algorithms for LPM for this host, disabling LPM.
[ 1.383961] hub 3-0:1.0: USB hub found
[ 16.865952] usbcore: registered new interface driver btusb
root@bsaedgy:~# lsusb -t
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=orion-ehci/1p, 480M
but I cannot currently connect a USB device to test.