FAQ: Reader ein festen Port zuweisen.

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device '/devices/pci0000:00/0000:00:13.2/usb4/4-2/4-2:1.0/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
looking at parent device '/devices/pci0000:00/0000:00:13.2/usb4/4-2/4-2:1.0/ttyUSB0':
KERNELS=="ttyUSB0"
SUBSYSTEMS=="usb-serial"
DRIVERS=="ftdi_sio"
ATTRS{latency_timer}=="1"
ATTRS{port_number}=="0"
looking at parent device '/devices/pci0000:00/0000:00:13.2/usb4/4-2/4-2:1.0':
KERNELS=="4-2:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="ftdi_sio"
ATTRS{bInterfaceNumber}=="00"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bNumEndpoints}=="02"
ATTRS{bInterfaceClass}=="ff"
ATTRS{bInterfaceSubClass}=="ff"
ATTRS{bInterfaceProtocol}=="ff"
ATTRS{supports_autosuspend}=="1"
ATTRS{interface}=="FT232R USB UART"
looking at parent device '/devices/pci0000:00/0000:00:13.2/usb4/4-2':
KERNELS=="4-2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="a0"
ATTRS{bMaxPower}==" 90mA"
ATTRS{urbnum}=="16"
ATTRS{idVendor}=="0403"
ATTRS{idProduct}=="6001"
ATTRS{bcdDevice}=="0600"
ATTRS{bDeviceClass}=="00"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="8"
ATTRS{speed}=="12"
ATTRS{busnum}=="4"
ATTRS{devnum}=="2"
ATTRS{devpath}=="2"
ATTRS{version}==" 2.00"
ATTRS{maxchild}=="0"
ATTRS{quirks}=="0x0"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{authorized}=="1"
ATTRS{manufacturer}=="FTDI"
ATTRS{product}=="FT232R USB UART"
ATTRS{serial}=="A9615RJ3"
looking at parent device '/devices/pci0000:00/0000:00:13.2/usb4':
KERNELS=="usb4"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bMaxPower}==" 0mA"
ATTRS{urbnum}=="35"
ATTRS{idVendor}=="1d6b"
ATTRS{idProduct}=="0001"
ATTRS{bcdDevice}=="0302"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{speed}=="12"
ATTRS{busnum}=="4"
ATTRS{devnum}=="1"
ATTRS{devpath}=="0"
ATTRS{version}==" 1.10"
ATTRS{maxchild}=="2"
ATTRS{quirks}=="0x0"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{authorized}=="1"
ATTRS{manufacturer}=="Linux 3.2.0-4-686-pae ohci_hcd"
ATTRS{product}=="OHCI Host Controller"
ATTRS{serial}=="0000:00:13.2"
ATTRS{authorized_default}=="1"
looking at parent device '/devices/pci0000:00/0000:00:13.2':
KERNELS=="0000:00:13.2"
SUBSYSTEMS=="pci"
DRIVERS=="ohci_hcd"
ATTRS{vendor}=="0x1002"
ATTRS{device}=="0x4389"
ATTRS{subsystem_vendor}=="0x1734"
ATTRS{subsystem_device}=="0x10d1"
ATTRS{class}=="0x0c0310"
ATTRS{irq}=="18"
ATTRS{local_cpus}=="ffffffff"
ATTRS{local_cpulist}=="0-31"
ATTRS{dma_mask_bits}=="32"
ATTRS{consistent_dma_mask_bits}=="32"
ATTRS{enable}=="1"
ATTRS{broken_parity_status}=="0"
ATTRS{msi_bus}==""
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""

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SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", ATTRS{serial}=="Reader A9615RJ3", SYMLINK+="HDPlus"

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ls -la /dev |grep ttyUSB
crw-rw---T 1 root dialout 188, 0 Aug 31 15:07 ttyUSB0

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