i2c-tiny-usb as detected on Linux computer http://blog.philippklaus.de/2015/02/i2c-tiny-usb/

dmesg

usb 3-2: new low speed USB device using uhci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
i2c-tiny-usb 3-2:1.0: version 2.05 found at bus 003 address 002
i2c-adapter i2c-3: connected i2c-tiny-usb device
usbcore: registered new interface driver i2c-tiny-usb

dmesg.avrusb

flashed with Makefile-avrusb.tiny45:

usb 1-4.2: new low speed USB device using ehci_hcd and address 39
usb 1-4.2: configuration #1 chosen from 1 choice
i2c-tiny-usb 1-4.2:1.0: version 1.05 found at bus 001 address 039
i2c-adapter i2c-3: connected i2c-tiny-usb device
usbcore: registered new interface driver i2c-tiny-usb

dmesg.linux-3.13

    usb 5-2.2.1: new low-speed USB device number 7 using ehci-pci
    i2c-tiny-usb 5-2.2.1:1.0: version 2.05 found at bus 005 address 007
    i2c i2c-8: connected i2c-tiny-usb device
    usbcore: registered new interface driver i2c-tiny-usb

dmesg.linux-3.18.5

[209.478340] usb 3-1.1.2: new low-speed USB device number 10 using ehci-pci
[210.595730] i2c-tiny-usb 3-1.1.2:1.0: version 2.05 found at bus 003 address 010
[210.596068] i2c i2c-8: connected i2c-tiny-usb device
[210.596101] usbcore: registered new interface driver i2c-tiny-usb
[217.020190] i2c /dev entries driver

lsusb-v.linux-3.13

Bus 005 Device 007: ID 0403:c631 Future Technology Devices International, Ltd i2c-tiny-usb interface
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x0403 Future Technology Devices International, Ltd
  idProduct          0xc631 i2c-tiny-usb interface
  bcdDevice            2.05
  iManufacturer           1 
  iProduct                2 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           18
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower               10mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0