I'm using pppd without any problem with a serial interface like ttyS0, ttyRPC0 or ttyAMA0, etc...
I'm using a raspberry with two i2c devices : i2c-0 and i2c-1.
Now, i would like to connect my modem on an i2c device at a specific address. For example : i would like to use the 0x28 i2c address on i2c-1 device.
My question is how to specify to pppd that i want to use this one ?