udev does not apply rules

Hi all,

I am having some problem assigning rules from udev.

I have 2 FTDI232 chips mounted on my board (they are totally 3 but I am interested in 2 of them right now), the kernel manages them with the drivers ftdi_sio, names them as ttyUS0 and ttyUSB1 and I am applying these rules in order to name them as usbS1 and usbS2:

KERNELS=="1-2.1" KERNEL=="ttyUSB0" ATTR{idVendor}=="0403" ATTR{idProduct}=="6001" SUBSYSTEMS=="usb" NAME="usbS1"
KERNELS=="1-2.2" KERNEL=="ttyUSB1" ATTR{idVendor}=="0403" ATTR{idProduct}=="6001" SUBSYSTEMS=="usb" NAME="usbS2"

according to the inormation from dmesg

[    4.676116] usb 1-2.1: new full-speed USB device number 3 using ehci-omap
[    4.811920] usb 1-2.1: New USB device found, idVendor=0403, idProduct=6001
[    4.819244] usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    4.826965] usb 1-2.1: Product: FT232R USB UART
[    4.831726] usb 1-2.1: Manufacturer: FTDI
[    4.835968] usb 1-2.1: SerialNumber: A101XRTT
[    4.963256] usb 1-2.2: new full-speed USB device number 4 using ehci-omap
[    5.102355] usb 1-2.2: New USB device found, idVendor=0403, idProduct=6001
[    5.109649] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    5.117370] usb 1-2.2: Product: FT232R USB UART
[    5.122161] usb 1-2.2: Manufacturer: FTDI
[    5.126403] usb 1-2.2: SerialNumber: A101XRTQ

...

[   16.839935] usbserial: USB Serial support registered for FTDI USB Serial Device
[   16.848327] ftdi_sio 1-2.1:1.0: FTDI USB Serial Device converter detected
[   16.856781] usb 1-2.1: Detected FT232RL
[   16.977935] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB0
[   16.986785] ftdi_sio 1-2.2:1.0: FTDI USB Serial Device converter detected
[   16.994720] usb 1-2.2: Detected FT232RL
[   17.099914] usb 1-2.2: FTDI USB Serial Device converter now attached to ttyUSB1
[   17.108581] ftdi_sio 1-2.7:1.0: FTDI USB Serial Device converter detected
[   17.116485] usb 1-2.7: Detected FT232RL
[   17.165710] i2c 2-005c: Driver mt9v032 requests probe deferral
[   17.187561] twl4030_madc 48070000.i2c:twl@48:madc: clk disabled, enabling
[   17.228759] usb 1-2.7: FTDI USB Serial Device converter now attached to ttyUSB2

But it's not working. I don't know why.

On a older system (with kernel 2.6.34) I was simply applying these rules:

KERNELS=="2-2.1" SUBSYSTEMS=="usb" NAME="usbS1"
KERNELS=="2-2.2" SUBSYSTEMS=="usb" NAME="usbS2"

which works fine on that system, but not on this one I am working on right now (of course with the KERNELS parameters changed).

What's wrong in my rules file ?
Thank you in advance for your suggestions.

Simon

Have you checked attribute matching carefully from the following?

udevadm info --attribute-walk --path=/sys/bus/usb-serial/devices/ttyUSB0

udevadm info --attribute-walk --path=/sys/bus/usb-serial/devices/ttyUSB1

Be careful with "ATTR" and "ATTRS" sysfs attributes. They are different.

Hi, I finally solved with this.

KERNELS=="1-2.1", SUBSYSTEMS=="usb", ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", SYMLINK+="usbS0"
KERNELS=="1-2.2", SUBSYSTEMS=="usb", ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", SYMLINK+="usbS1"
KERNELS=="1-2.7", SUBSYSTEMS=="usb", ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", SYMLINK+="usbS3"

Glad to read that all is working as expected now.