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Introduce the devpath option to find the control channel device from a hardware path for a USB or a WWAN device. This option is useful when there are multiple modems connected to the system. The name of the control channel device of a modem can change depending on which modem initialises first or if it was recently plugged in. The devpath option allows specifying the hardware path of the modem where the control channel device will be found using that. For the USB device hardware path, it is allowed to specify the USB port number the modem is directly connected to. If the device and devpath options are both set, devpath takes precedence over device. The USB device hardware path of a control channel device can be found by: readlink -f /sys/class/usbmisc/cdc-wdmX/device The WWAN device hardware path of a control channel device can be found by: readlink -f /sys/class/wwan/wwanXqmiX/device An example uci configuration would be: config interface 'wwan_usb1' option proto 'qmi' option auth 'none' option devpath '/sys/devices/platform/1e1c0000.xhci/usb1/1-1' option apn 'internet' option pdptype 'ipv4v6' Or: config interface 'wwan_pcie1' option proto 'qmi' option auth 'none' option devpath '/sys/devices/platform/soc/11280000.pcie/pci0003:00/0003:00:00.0/0003:01:00.0' option apn 'internet' option pdptype 'ipv4v6' Signed-off-by: Chester A. Unal <chester.a.unal@arinc9.com>