IIC troubles w/ ppc4xx (STB04)

Eugene Surovegin ebs at ebshome.net
Sun Apr 16 13:09:44 EST 2006

On Sun, Apr 16, 2006 at 03:41:28AM +0200, Andre Draszik wrote:
> Hi,
> I am having trouble using iic_smbus_quick() of i2c/busses/i2c-ibm-iic.c
> I am trying to i2c_probe() to probe for some devices, which at the end
> calls iic_smbus_quick().
> Basically, I get a Data Machine Check as soon as iic->directcntl is
> accessed. Actually, this register is not described in the (old)
> documentation I have.

Does everything else work? I mean ordinary I2C access like read/write.
If everything else is fine, just comment out that iic_smbus_quick() 
call or just don't use i2c_probe(). It's a hack anyway, because I2C 
spec has no provision for "probing". I wrote this bit-banging 
implementation just to get some people off my back :).

BTW, I never tested my driver on STB4, maybe ocp_defs are wrong (in 
this case i2c will not work at all).


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