mpc8270 : i2c support

Hi,
We have designed a system using a mpc8270 cpu. The firmware we use is u-boot and we can access all our i2c devices from u-boot.

But when we try to access i2c devices from under linux 2.6 using the /dev/i2c-0 special file we get an ENODEV on opening that file. I think it is because we lack an adapter driver.

If I look in the official kernel, it looks like the adapter driver for the mpc8270 i2c system is ./drivers/i2c/busses/i2c-mpc.c. Is this correct?

Why is this driver registering as a platform driver and not as a i2c bus driver?

In DENX ELDK there is also a i2c-mpc8260.c, but we couldn't get that to work either.

What should I do to be able to access i2c devices using the /dev/i2c-0 file? I feel I need to modify the i2c adapter driver to follow the driver model, but in what ways?

Thx for any help,
-jf simon

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