Comment 6 for bug 1011449

The SMBus 2.0 driver was included in kernel 3.9:

commit 13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9
Author: Neil Horman <email address hidden>
Date: Mon Feb 4 14:54:10 2013 -0500

    i2c: Adding support for Intel iSMT SMBus 2.0 host controller

    The iSMT (Intel SMBus Message Transport) supports multi-master I2C/SMBus,
    as well as IPMI. It's operation is DMA-based and utilizes descriptors to
    initiate transactions on the bus.

    The iSMT hardware can act as both a master and a target, although this
    driver only supports being a master.

    Signed-off-by: Neil Horman <email address hidden>
    Signed-off-by: Bill Brown <email address hidden>
    Tested-by: Seth Heasley <email address hidden>
    Reviewed-by: Jean Delvare <email address hidden>
    Signed-off-by: Wolfram Sang <email address hidden>