codice:
device '/sys/class/tty/ttyUSB0' has major:minor 188:0
  looking at class device '/sys/class/tty/ttyUSB0':
    SUBSYSTEM=="tty"
    SYSFS{dev}=="188:0"

follow the "device"-link to the physical device:
  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11-1.3/1-1.3.1/1-1.3.1:1.0/ttyUSB0':
    BUS=="usb-serial"
    ID=="ttyUSB0"
    DRIVER=="mct_u232"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11-1.3/1-1.3.1/1-1.3.1:1.0':
    BUS=="usb"
    ID=="1-1.3.1:1.0"
    DRIVER=="mct_u232"
    SYSFS{bAlternateSetting}==" 0"
    SYSFS{bInterfaceClass}=="ff"
    SYSFS{bInterfaceNumber}=="00"
    SYSFS{bInterfaceProtocol}=="ff"
    SYSFS{bInterfaceSubClass}=="ff"
    SYSFS{bNumEndpoints}=="03"
    SYSFS{modalias}=="usb:v0711p0230d0102dc00dsc00dp00icFFiscFFipFF"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11-1.3/1-1.3.1':
    BUS=="usb"
    ID=="1-1.3.1"
    DRIVER=="usb"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bDeviceClass}=="00"
    SYSFS{bDeviceProtocol}=="00"
    SYSFS{bDeviceSubClass}=="00"
    SYSFS{bMaxPower}=="100mA"
    SYSFS{bNumConfigurations}=="1"
    SYSFS{bNumInterfaces}==" 1"
    SYSFS{bcdDevice}=="0102"
    SYSFS{bmAttributes}=="a0"
    SYSFS{configuration}==""
    SYSFS{devnum}=="7"
    SYSFS{idProduct}=="0230"
    SYSFS{idVendor}=="0711"
    SYSFS{manufacturer}=="USB-RS232 Interface Converter"
    SYSFS{maxchild}=="0"
    SYSFS{product}=="Targus Group Intl"
    SYSFS{serial}=="544009"
    SYSFS{speed}=="12"
    SYSFS{version}==" 1.10"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-11-1.3':
    BUS=="usb"
    ID=="1-1.3"
    DRIVER=="usb"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bDeviceClass}=="09"
    SYSFS{bDeviceProtocol}=="00"
    SYSFS{bDeviceSubClass}=="00"
    SYSFS{bMaxPower}=="100mA"
    SYSFS{bNumConfigurations}=="1"
    SYSFS{bNumInterfaces}==" 1"
    SYSFS{bcdDevice}=="0110"
    SYSFS{bmAttributes}=="a0"
    SYSFS{configuration}==""
    SYSFS{devnum}=="5"
    SYSFS{idProduct}=="1122"
    SYSFS{idVendor}=="04cc"
    SYSFS{maxchild}=="3"
    SYSFS{speed}=="12"
    SYSFS{version}==" 1.10"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1:
    BUS=="usb"
    ID=="1-1"
    DRIVER=="usb"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bDeviceClass}=="09"
    SYSFS{bDeviceProtocol}=="00"
    SYSFS{bDeviceSubClass}=="00"
    SYSFS{bMaxPower}=="  0mA"
    SYSFS{bNumConfigurations}=="1"
    SYSFS{bNumInterfaces}==" 1"
    SYSFS{bcdDevice}=="0125"
    SYSFS{bmAttributes}=="e0"
    SYSFS{configuration}==""
    SYSFS{devnum}=="4"
    SYSFS{idProduct}=="2046"
    SYSFS{idVendor}=="0451"
    SYSFS{maxchild}=="4"
    SYSFS{speed}=="12"
    SYSFS{version}==" 1.10"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0/usb1':
    BUS=="usb"
    ID=="usb1"
    DRIVER=="usb"
    SYSFS{bConfigurationValue}=="1"
    SYSFS{bDeviceClass}=="09"
    SYSFS{bDeviceProtocol}=="00"
    SYSFS{bDeviceSubClass}=="00"
    SYSFS{bMaxPower}=="  0mA"
    SYSFS{bNumConfigurations}=="1"
    SYSFS{bNumInterfaces}==" 1"
    SYSFS{bcdDevice}=="0206"
    SYSFS{bmAttributes}=="c0"
    SYSFS{configuration}==""
    SYSFS{devnum}=="1"
    SYSFS{idProduct}=="0000"
    SYSFS{idVendor}=="0000"
    SYSFS{manufacturer}=="Linux 2.6.12.1 ohci_hcd"
    SYSFS{maxchild}=="2"
    SYSFS{product}=="ALi Corporation USB 1.1 Controller"
    SYSFS{serial}=="0000:00:14.0"
    SYSFS{speed}=="12"
    SYSFS{version}==" 1.10"

  looking at the device chain at '/sys/devices/pci0000:00/0000:00:14.0':
    BUS=="pci"
    ID=="0000:00:14.0"
    DRIVER=="ohci_hcd"
    SYSFS{class}=="0x0c0310"
    SYSFS{device}=="0x5237"
    SYSFS{irq}=="11"
    SYSFS{local_cpus}=="1"
    SYSFS{modalias}=="pci:v000010B9d00005237sv00001025sd00001019bc0Csc03i10"
    SYSFS{subsystem_device}=="0x1019"
    SYSFS{subsystem_vendor}=="0x1025"
    SYSFS{vendor}=="0x10b9"

  looking at the device chain at '/sys/devices/pci0000:00':
    BUS==""
    ID=="pci0000:00"
    DRIVER=="unknown"
E di tutte queste informazioni qual'è il i/o base address?