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I have installed 2012-07-15-wheezy-raspbian, and the i2c-dev module and i2c_bcm2708 are there and work with i2c-tools.

How do I get the i2c-dev module etc. to load at bootup?

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2 Answers

up vote 7 down vote accepted

Assuming the module loads using sudo modprobe i2c-dev, you should add i2c-dev to /etc/modules.

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up vote 4 down vote

They are blacklisted in /etc/modprobe.d/raspi-blacklist.conf 

# blacklist spi and i2c by default (many users don't need them)

blacklist spi-bcm2708
blacklist i2c-bcm2708

so comment these lines.

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I uncommented them. spidev, spi-bcm2708 and i2c-bcm2708 all loaded, but i2c-dev didn't so I guess I still need it in /etc/modules – gnibbler Jul 25 '12 at 9:57
1  
Why on earth would they blacklist these!?! – Alex Chamberlain Aug 6 '12 at 8:03

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