/dev/i2c missing

[micksulley]

I am trying to add a owfs system to a Pi, which I have done on other Pi's, but this time I do not have /dev/i2c
I have updated /etc/modprobe.d/raspi-blacklist.conf and commented out the i2c line
I have added i2c-dev to /etc/modules
I have rebooted
It is a fresh install of Raspian

What have I missed?

Thanks
Mick

[joan]

Perhaps http://www.raspberrypi.org/forums/viewt ... 28&t=97314

[micksulley]

Yes adding
dtparam=i2c1=on
dtparam=i2c0=on
to config.txt has fixed it, thank you. Why has this changed? I have done this many time before and never added anything to config.txt.

Mick

[joan]

Yes adding
dtparam=i2c1=on
dtparam=i2c0=on
to config.txt has fixed it, thank you. Why has this changed? I have done this many time before and never added anything to config.txt.

Mick

It's the new way of doing things. Ours not to reason why, ours but to do what we're told.

[DougieLawson]

Why has this changed? I have done this many time before and never added anything to config.txt.

Because you've been running sudo rpi-update when you don't need to . That's pushed you to the 3.18.3+ kernel which has the new device tree support.

[ShiftPlusOne]

As for why this has changed at all, I think that thread explains how it came about pretty well.

[borlandoflorida]

I had the exact same issue on Saturday 24 January 2015 and only just found this thread after being pointed here by a really helpful user over on Redditt.

My fix was to install the latest Raspbian image (December 2014) and not updating the firmware with rpi-update. My Pi works fine as it is, but it's good to know for future reference as I was pulling my hair out with this!