linux-stable-rt/Documentation/i2c/busses/i2c-parport-light

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Kernel driver i2c-parport-light
Author: Jean Delvare <khali@linux-fr.org>
This driver is a light version of i2c-parport. It doesn't depend
on the parport driver, and uses direct I/O access instead. This might be
prefered on embedded systems where wasting memory for the clean but heavy
parport handling is not an option. The drawback is a reduced portability
and the impossibility to daisy-chain other parallel port devices.
Please see i2c-parport for documentation.