8xx i2c refers to unspecified chip errata

[Dr. Craig Hollabaugh]

> Joakim Tjernlund wrote:
>
>  > .... The driver(i2c-algo-8xx.c) that
> > comes with the kernel has other severe bugs(memory corruption etc.) as well.
>

Dan Wrote
> Just toggle the bits in software.  I never saw an application where the I2C
> controller provided a performance advantage.  It's lots of software to execute,
> along with all of the interrupt handling and stuff, so you just spend lots of
> overhead not making any other progress.
>
> Make sure you carefully analyze the entire system performance advantages.
> Using the controller assitance just because it is there isn't always the
> proper solution.  Same is true for the SPI.


Here's a link to my book's I2C bit banging code for 8xx
http://www.embeddedlinuxinterfacing.com/chapters/10/SAA1064_rpxcllf.c

You can pull the I2C routines from this code.

Let me know if you have any questions.
Craig


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