From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Stephen Morgan" Date: Thu, 12 May 2005 19:58:15 +0000 Subject: Need persistent node to USB port naming Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org Hello all, I'm converting a driver for a USB device from Linux 2.4 to 2.6. The device is embedded and the host is an embedded PC. There may be as many as 6 identical devices attached. The only way they are differentiated is by the USB port they're plugged into - the cabling is fixed. So, when the user asks for 'foo_dev0' for instance, he wants the first USB device - 'foo_dev1' should give him the 2nd device, etc. Under 2.4, I created six nodes, assigning them minors 192 thru 197. In the driver's probe(), I used usb_make_path to create an index to the device. For file ops, I used (MINOR(inode_p->i_rdev) - 192) to get an index from the node. So far, under 2.6, the best approach I can see is to create a udev .rules file to make the nodes, like so: BUS="usb", PLACE="1-1", NAME="usb/foo_dev0" Is this the best way to go, or have I overlooked something simpler? Thanks Stephen Morgan ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_ids93&alloc_id281&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel