This is regarding a series of emails between Guenter Roeck and Jean Delvare titled "Problem with multiple i2c multiplexers on one bus, and mux bus naming" sent in November 2013. Ref: http://thread.gmane.org/gmane.linux.drivers.i2c/16980 I'm having the same problem with multiple PCA954x multiplexers on the same bus and there is no way to tell them apart just by looking at the "name" file. There was a suggestion to change the name from "i2c-N-mux (chan_id M)" to "i2c-N-mux-XX (chan_id M)" or even "i2c-N-mux-i2c-XX (chan_id M)", where XX is the multiplexer's i2c address. That would solve my problem, but unfortunately it looks like Guenter never submitted the patch (or maybe it was rejected?). I would like to submit a similar change, but I was thinking of adding a module parameter so that the change is not the default behavior. The idea is to preserve backward compatibility for applications that don't require this fix. For example, modprobe i2c-dev explicit_mux_id=1 would use i2c-N-mux-i2c-XX (chan_id M), whereas modprobe i2c-dev would default to the current behavior: i.e. i2c-N-mux (chan_id M). Any thoughts, comments? Regards, Martin -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
