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    Fixed USB /dev/name for USB Micro Teleinfo device

    MicroTéléinfo
    devttyusb linux usb teleinfo fixed
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    • Charles
      Charles last edited by Charles

      Today I received a mail from a user who asked me how to fix /dev/ttyUSBx name for Micro Teleinfo devices. This make sense because on linux, ordering number can sometime be different if you have multiple USB Serial device connected (whatever chip in it such as FTDI, PL2303, CP2302, CH340, … Continue Reading

      Click here to see the full blog post

      1 Reply Last reply Reply Quote
      • J
        jan last edited by

        Hi Charles,
        thank you for your post. I have the similar issue when I have 2 usb to serial port converters and every time I restart my RPi2 they show as different /dev/ttyUSBx. The problem is that these are cheap chinease converters and they dont have unique serial number. Here is my lsusb

        Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
        Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
        Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
        Bus 001 Device 004: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
        Bus 001 Device 005: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
        Bus 001 Device 006: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter

        I have actually 3 usb converters but the 3rd one has serial number but the 2 chinease converters dont. Any idea how to fix this? I am struggling to write the udev rule without serial number, i guess it is not possible.
        Thanks a log in advance.
        Regards,
        Jan

        1 Reply Last reply Reply Quote
        • Charles
          Charles last edited by Charles

          @jan
          could you post a result of each

          udevadm info --attribute-walk -n /dev/ttyUSBx

          Pretty sure we can find some interesting different data

          1 Reply Last reply Reply Quote
          • J
            jan last edited by

            @Charles here it is, thanks for your help, let me know if you spot something in the data:

            $ udevadm info --attribute-walk -n /dev/ttyUSB0

            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/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0':
            KERNEL=="ttyUSB0"
            SUBSYSTEM=="tty"
            DRIVER==""

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0':
            KERNELS=="ttyUSB0"
            SUBSYSTEMS=="usb-serial"
            DRIVERS=="ftdi_sio"
            ATTRS{port_number}=="0"
            ATTRS{latency_timer}=="1"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.0':
            KERNELS=="1-1.2:1.0"
            SUBSYSTEMS=="usb"
            DRIVERS=="ftdi_sio"
            ATTRS{bInterfaceClass}=="ff"
            ATTRS{bInterfaceSubClass}=="ff"
            ATTRS{bInterfaceProtocol}=="ff"
            ATTRS{bNumEndpoints}=="02"
            ATTRS{authorized}=="1"
            ATTRS{supports_autosuspend}=="1"
            ATTRS{bAlternateSetting}==" 0"
            ATTRS{bInterfaceNumber}=="00"
            ATTRS{interface}=="Papouch SB485S (SC)"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2':
            KERNELS=="1-1.2"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="00"
            ATTRS{devpath}=="1.2"
            ATTRS{idVendor}=="0403"
            ATTRS{speed}=="12"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="8"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="4"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="100mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="80"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="0"
            ATTRS{bcdDevice}=="0600"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{serial}=="PPTPLYYD"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="36003915"
            ATTRS{ltm_capable}=="no"
            ATTRS{manufacturer}=="Papouch s.r.o."
            ATTRS{removable}=="removable"
            ATTRS{idProduct}=="6001"
            ATTRS{bDeviceClass}=="00"
            ATTRS{product}=="Papouch SB485S (SC)"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
            KERNELS=="1-1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="02"
            ATTRS{devpath}=="1"
            ATTRS{idVendor}=="0424"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="2"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="2mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="5"
            ATTRS{bcdDevice}=="0200"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="54"
            ATTRS{ltm_capable}=="no"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="9514"
            ATTRS{bDeviceClass}=="09"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
            KERNELS=="usb1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="01"
            ATTRS{devpath}=="0"
            ATTRS{idVendor}=="1d6b"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{authorized_default}=="1"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="1"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="0mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="1"
            ATTRS{interface_authorized_default}=="1"
            ATTRS{bcdDevice}=="0404"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{serial}=="3f980000.usb"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="25"
            ATTRS{ltm_capable}=="no"
            ATTRS{manufacturer}=="Linux 4.4.27-v7+ dwc_otg_hcd"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="0002"
            ATTRS{bDeviceClass}=="09"
            ATTRS{product}=="DWC OTG Controller"

            looking at parent device '/devices/platform/soc/3f980000.usb':
            KERNELS=="3f980000.usb"
            SUBSYSTEMS=="platform"
            DRIVERS=="dwc_otg"
            ATTRS{hnp}=="HstNegScs = 0x0"
            ATTRS{srp}=="SesReqScs = 0x1"
            ATTRS{regvalue}=="invalid offset"
            ATTRS{hsic_connect}=="HSIC Connect = 0x1"
            ATTRS{guid}=="GUID = 0x2708a000"
            ATTRS{mode}=="Mode = 0x1"
            ATTRS{srpcapable}=="SRPCapable = 0x1"
            ATTRS{regdump}=="Register Dump"
            ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
            ATTRS{ggpio}=="GGPIO = 0x00000000"
            ATTRS{hprt0}=="HPRT0 = 0x00001405"
            ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 1060 msecs (106 jiffies)"
            ATTRS{driver_override}=="(null)"
            ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
            ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
            ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
            ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
            ATTRS{busconnected}=="Bus Connected = 0x1"
            ATTRS{hcddump}=="HCD Dump"
            ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
            ATTRS{spramdump}=="SPRAM Dump"
            ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
            ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
            ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
            ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
            ATTRS{devspeed}=="Device Speed = 0x0"
            ATTRS{fr_interval}=="Frame Interval = 0x1d4c"
            ATTRS{rem_wakeup_pwrdn}==""
            ATTRS{bussuspend}=="Bus Suspend = 0x0"
            ATTRS{buspower}=="Bus Power = 0x1"
            ATTRS{hnpcapable}=="HNPCapable = 0x1"
            ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 2140 msecs (214 jiffies)"
            ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
            ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
            ATTRS{regoffset}=="0xffffffff"

            looking at parent device '/devices/platform/soc':
            KERNELS=="soc"
            SUBSYSTEMS=="platform"
            DRIVERS==""
            ATTRS{driver_override}=="(null)"

            looking at parent device '/devices/platform':
            KERNELS=="platform"
            SUBSYSTEMS==""
            DRIVERS==""

             $ udevadm info --attribute-walk -n /dev/ttyUSB1

            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/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4:1.0/ttyUSB1/tty/ttyUSB1':
            KERNEL=="ttyUSB1"
            SUBSYSTEM=="tty"
            DRIVER==""

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4:1.0/ttyUSB1':
            KERNELS=="ttyUSB1"
            SUBSYSTEMS=="usb-serial"
            DRIVERS=="ch341-uart"
            ATTRS{port_number}=="0"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4:1.0':
            KERNELS=="1-1.4:1.0"
            SUBSYSTEMS=="usb"
            DRIVERS=="ch341"
            ATTRS{bInterfaceClass}=="ff"
            ATTRS{bInterfaceSubClass}=="01"
            ATTRS{bInterfaceProtocol}=="02"
            ATTRS{bNumEndpoints}=="03"
            ATTRS{authorized}=="1"
            ATTRS{supports_autosuspend}=="1"
            ATTRS{bAlternateSetting}==" 0"
            ATTRS{bInterfaceNumber}=="00"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4':
            KERNELS=="1-1.4"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="00"
            ATTRS{devpath}=="1.4"
            ATTRS{idVendor}=="1a86"
            ATTRS{speed}=="12"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="8"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="5"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="96mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="80"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="0"
            ATTRS{bcdDevice}=="0254"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{version}==" 1.10"
            ATTRS{urbnum}=="7492"
            ATTRS{ltm_capable}=="no"
            ATTRS{removable}=="removable"
            ATTRS{idProduct}=="7523"
            ATTRS{bDeviceClass}=="ff"
            ATTRS{product}=="USB2.0-Serial"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
            KERNELS=="1-1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="02"
            ATTRS{devpath}=="1"
            ATTRS{idVendor}=="0424"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="2"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="2mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="5"
            ATTRS{bcdDevice}=="0200"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="54"
            ATTRS{ltm_capable}=="no"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="9514"
            ATTRS{bDeviceClass}=="09"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
            KERNELS=="usb1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="01"
            ATTRS{devpath}=="0"
            ATTRS{idVendor}=="1d6b"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{authorized_default}=="1"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="1"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="0mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="1"
            ATTRS{interface_authorized_default}=="1"
            ATTRS{bcdDevice}=="0404"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{serial}=="3f980000.usb"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="25"
            ATTRS{ltm_capable}=="no"
            ATTRS{manufacturer}=="Linux 4.4.27-v7+ dwc_otg_hcd"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="0002"
            ATTRS{bDeviceClass}=="09"
            ATTRS{product}=="DWC OTG Controller"

            looking at parent device '/devices/platform/soc/3f980000.usb':
            KERNELS=="3f980000.usb"
            SUBSYSTEMS=="platform"
            DRIVERS=="dwc_otg"
            ATTRS{hnp}=="HstNegScs = 0x0"
            ATTRS{srp}=="SesReqScs = 0x1"
            ATTRS{regvalue}=="invalid offset"
            ATTRS{hsic_connect}=="HSIC Connect = 0x1"
            ATTRS{guid}=="GUID = 0x2708a000"
            ATTRS{mode}=="Mode = 0x1"
            ATTRS{srpcapable}=="SRPCapable = 0x1"
            ATTRS{regdump}=="Register Dump"
            ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
            ATTRS{ggpio}=="GGPIO = 0x00000000"
            ATTRS{hprt0}=="HPRT0 = 0x00001405"
            ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 870 msecs (87 jiffies)"
            ATTRS{driver_override}=="(null)"
            ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
            ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
            ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
            ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
            ATTRS{busconnected}=="Bus Connected = 0x1"
            ATTRS{hcddump}=="HCD Dump"
            ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
            ATTRS{spramdump}=="SPRAM Dump"
            ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
            ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
            ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
            ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
            ATTRS{devspeed}=="Device Speed = 0x0"
            ATTRS{fr_interval}=="Frame Interval = 0x1d4c"
            ATTRS{rem_wakeup_pwrdn}==""
            ATTRS{bussuspend}=="Bus Suspend = 0x0"
            ATTRS{buspower}=="Bus Power = 0x1"
            ATTRS{hnpcapable}=="HNPCapable = 0x1"
            ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1890 msecs (189 jiffies)"
            ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
            ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
            ATTRS{regoffset}=="0xffffffff"

            looking at parent device '/devices/platform/soc':
            KERNELS=="soc"
            SUBSYSTEMS=="platform"
            DRIVERS==""
            ATTRS{driver_override}=="(null)"

            looking at parent device '/devices/platform':
            KERNELS=="platform"
            SUBSYSTEMS==""
            DRIVERS==""

            $ udevadm info --attribute-walk -n /dev/ttyUSB2

            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/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.0/ttyUSB2/tty/ttyUSB2':
            KERNEL=="ttyUSB2"
            SUBSYSTEM=="tty"
            DRIVER==""

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.0/ttyUSB2':
            KERNELS=="ttyUSB2"
            SUBSYSTEMS=="usb-serial"
            DRIVERS=="ch341-uart"
            ATTRS{port_number}=="0"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5/1-1.5:1.0':
            KERNELS=="1-1.5:1.0"
            SUBSYSTEMS=="usb"
            DRIVERS=="ch341"
            ATTRS{bInterfaceClass}=="ff"
            ATTRS{bInterfaceSubClass}=="01"
            ATTRS{bInterfaceProtocol}=="02"
            ATTRS{bNumEndpoints}=="03"
            ATTRS{authorized}=="1"
            ATTRS{supports_autosuspend}=="1"
            ATTRS{bAlternateSetting}==" 0"
            ATTRS{bInterfaceNumber}=="00"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5':
            KERNELS=="1-1.5"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="00"
            ATTRS{devpath}=="1.5"
            ATTRS{idVendor}=="1a86"
            ATTRS{speed}=="12"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="8"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="6"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="96mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="80"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="0"
            ATTRS{bcdDevice}=="0254"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{version}==" 1.10"
            ATTRS{urbnum}=="900734"
            ATTRS{ltm_capable}=="no"
            ATTRS{removable}=="removable"
            ATTRS{idProduct}=="7523"
            ATTRS{bDeviceClass}=="ff"
            ATTRS{product}=="USB2.0-Serial"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1/1-1':
            KERNELS=="1-1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="02"
            ATTRS{devpath}=="1"
            ATTRS{idVendor}=="0424"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="2"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="2mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="5"
            ATTRS{bcdDevice}=="0200"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="54"
            ATTRS{ltm_capable}=="no"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="9514"
            ATTRS{bDeviceClass}=="09"

            looking at parent device '/devices/platform/soc/3f980000.usb/usb1':
            KERNELS=="usb1"
            SUBSYSTEMS=="usb"
            DRIVERS=="usb"
            ATTRS{bDeviceSubClass}=="00"
            ATTRS{bDeviceProtocol}=="01"
            ATTRS{devpath}=="0"
            ATTRS{idVendor}=="1d6b"
            ATTRS{speed}=="480"
            ATTRS{bNumInterfaces}==" 1"
            ATTRS{bConfigurationValue}=="1"
            ATTRS{bMaxPacketSize0}=="64"
            ATTRS{authorized_default}=="1"
            ATTRS{busnum}=="1"
            ATTRS{devnum}=="1"
            ATTRS{configuration}==""
            ATTRS{bMaxPower}=="0mA"
            ATTRS{authorized}=="1"
            ATTRS{bmAttributes}=="e0"
            ATTRS{bNumConfigurations}=="1"
            ATTRS{maxchild}=="1"
            ATTRS{interface_authorized_default}=="1"
            ATTRS{bcdDevice}=="0404"
            ATTRS{avoid_reset_quirk}=="0"
            ATTRS{quirks}=="0x0"
            ATTRS{serial}=="3f980000.usb"
            ATTRS{version}==" 2.00"
            ATTRS{urbnum}=="25"
            ATTRS{ltm_capable}=="no"
            ATTRS{manufacturer}=="Linux 4.4.27-v7+ dwc_otg_hcd"
            ATTRS{removable}=="unknown"
            ATTRS{idProduct}=="0002"
            ATTRS{bDeviceClass}=="09"
            ATTRS{product}=="DWC OTG Controller"

            looking at parent device '/devices/platform/soc/3f980000.usb':
            KERNELS=="3f980000.usb"
            SUBSYSTEMS=="platform"
            DRIVERS=="dwc_otg"
            ATTRS{hnp}=="HstNegScs = 0x0"
            ATTRS{srp}=="SesReqScs = 0x1"
            ATTRS{regvalue}=="invalid offset"
            ATTRS{hsic_connect}=="HSIC Connect = 0x1"
            ATTRS{guid}=="GUID = 0x2708a000"
            ATTRS{mode}=="Mode = 0x1"
            ATTRS{srpcapable}=="SRPCapable = 0x1"
            ATTRS{regdump}=="Register Dump"
            ATTRS{gpvndctl}=="GPVNDCTL = 0x00000000"
            ATTRS{ggpio}=="GGPIO = 0x00000000"
            ATTRS{hprt0}=="HPRT0 = 0x00001005"
            ATTRS{wr_reg_test}=="Time to write GNPTXFSIZ reg 10000000 times: 680 msecs (68 jiffies)"
            ATTRS{driver_override}=="(null)"
            ATTRS{hcd_frrem}=="HCD Dump Frame Remaining"
            ATTRS{mode_ch_tim_en}=="Mode Change Ready Timer Enable = 0x0"
            ATTRS{gnptxfsiz}=="GNPTXFSIZ = 0x01000306"
            ATTRS{remote_wakeup}=="Remote Wakeup Sig = 0 Enabled = 0 LPM Remote Wakeup = 0"
            ATTRS{busconnected}=="Bus Connected = 0x1"
            ATTRS{hcddump}=="HCD Dump"
            ATTRS{gotgctl}=="GOTGCTL = 0x001c0001"
            ATTRS{spramdump}=="SPRAM Dump"
            ATTRS{grxfsiz}=="GRXFSIZ = 0x00000306"
            ATTRS{gsnpsid}=="GSNPSID = 0x4f54280a"
            ATTRS{gusbcfg}=="GUSBCFG = 0x20001700"
            ATTRS{hptxfsiz}=="HPTXFSIZ = 0x02000406"
            ATTRS{devspeed}=="Device Speed = 0x0"
            ATTRS{fr_interval}=="Frame Interval = 0x1d4c"
            ATTRS{rem_wakeup_pwrdn}==""
            ATTRS{bussuspend}=="Bus Suspend = 0x0"
            ATTRS{buspower}=="Bus Power = 0x1"
            ATTRS{hnpcapable}=="HNPCapable = 0x1"
            ATTRS{rd_reg_test}=="Time to read GNPTXFSIZ reg 10000000 times: 1700 msecs (170 jiffies)"
            ATTRS{enumspeed}=="Device Enumeration Speed = 0x1"
            ATTRS{inv_sel_hsic}=="Invert Select HSIC = 0x0"
            ATTRS{regoffset}=="0xffffffff"

            looking at parent device '/devices/platform/soc':
            KERNELS=="soc"
            SUBSYSTEMS=="platform"
            DRIVERS==""
            ATTRS{driver_override}=="(null)"

            looking at parent device '/devices/platform':
            KERNELS=="platform"
            SUBSYSTEMS==""
            DRIVERS==""

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