Manufacturer: SILICON LABORATORIES INC.
Product: FM Radio
usb.c: unhandled interfaces on device
usb.c: USB device 2 (vend/prod 0x10c4/0x818a) is not claimed by any active driver.
  Length              = 18
  DescriptorType      = 01
  USB version         = 1.10
  Vendor:Product      = 10c4:818a
  MaxPacketSize0      = 64
  NumConfigurations   = 1
  Device version      = 1.00
  Device Class:SubClass:Protocol = 00:00:00
    Per-interface classes
Configuration:
  bLength             =    9
  bDescriptorType     =   02
  wTotalLength        = 0091
  bNumInterfaces      =   03
  bConfigurationValue =   01
  iConfiguration      =   00
  bmAttributes        =   80
  MaxPower            =  100mA

  Interface: 0
  Alternate Setting:  0
    bLength             =    9
    bDescriptorType     =   04
    bInterfaceNumber    =   00
    bAlternateSetting   =   00
    bNumEndpoints       =   00
    bInterface Class:SubClass:Protocol =   01:01:00
    iInterface          =   00

  Interface: 1
  Alternate Setting:  0
    bLength             =    9
    bDescriptorType     =   04
    bInterfaceNumber    =   01
    bAlternateSetting   =   00
    bNumEndpoints       =   00
    bInterface Class:SubClass:Protocol =   01:02:00
    iInterface          =   00
  Alternate Setting:  1
    bLength             =    9
    bDescriptorType     =   04
    bInterfaceNumber    =   01
    bAlternateSetting   =   01
    bNumEndpoints       =   01
    bInterface Class:SubClass:Protocol =   01:02:00
    iInterface          =   00
    Endpoint:
      bLength             =    9 (Audio)
      bDescriptorType     =   05
      bEndpointAddress    =   83 (in)
      bmAttributes        =   05 (Isochronous)
      wMaxPacketSize      = 0200
      bInterval           =   01
      bRefresh            =   00
      bSynchAddress       =   00

  Interface: 2
  Alternate Setting:  0
    bLength             =    9
    bDescriptorType     =   04
    bInterfaceNumber    =   02
    bAlternateSetting   =   00
    bNumEndpoints       =   02
    bInterface Class:SubClass:Protocol =   03:00:00
    iInterface          =   00
    Endpoint:
      bLength             =    7
      bDescriptorType     =   05
      bEndpointAddress    =   81 (in)
      bmAttributes        =   03 (Interrupt)
      wMaxPacketSize      = 0040
      bInterval           =   0a
    Endpoint:
      bLength             =    7
      bDescriptorType     =   05
      bEndpointAddress    =   02 (out)
      bmAttributes        =   03 (Interrupt)
      wMaxPacketSize      = 0040
      bInterval           =   01
usb.c: kusbd: /sbin/hotplug add 2