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Hello,

> I now have iic attaching to viapcib, but it just occurred to me that
> to attach to iic I need to specify an 'addr'. How does isapnp@isa get
> around this? Is it simply possible because ISA doesn't have strict
> requirements on attach args? Will anybody scream bloody murder if I
> make 'addr' optional in i2c_attach_args?

I'm not sure. Many iic devices have at least partially hardcoded
addresses, usually you can choose between two by pulling a pin low or
high.
The problem is that these addresses aren't necessarily unique since the
address space is pretty small and not all devices can be reliably probed
( you can check if /a/ device is there but you can't always be sure it
really is what you're looking for )

Not that I'm an expert on iic stuff, but this is what I learned when
writing drivers for hardware monitors found in various Macs ( where I
cheated and used the OF device tree to find the iic addresses )

have fun
Michael

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