Hey Garfield, > I have a situation where I have a ublox modem, the LISA u200, wired up using > its SPI bus as the communication channel. On the DTE side is a raspberry pi > SBC with a custom spi platform driver that exposes a tty device for modem. > This driver is not capable of multiplexing and exposing multiple virtual > channels. > > To overcome this I have a user mode daemon that performs this function by > connection to the single tty port exposed by the spi driver and in turn > creating 5 pseudo tty's (/dev/ptty1 -> /dev/ptty5) to interact with. These > are actually links to /dev/pts/1 to /dev/pts/5. > > I want the ublox plugin to manage this device but there seems to be no way to > filter/grab those ports. >
You should be able to add the ID_MM_PHYSDEV_UID udev tags for all those pseudo TTYs, so that ModemManager can "bind" all those ports together to the same modem object, see https://www.freedesktop.org/software/ModemManager/doc/latest/ModemManager/ModemManager-Common-udev-tags.html#ID-MM-PHYSDEV-UID:CAPS -- Aleksander
