[U-Boot] [PATCH 13/17] post/i2c: Add ability to ignore I2C devices

Wolfgang Denk
2010-09-30T17:54:33Z

Dear Peter Tyser,

In message <1285868400.28947.19878.camel@petert> you wrote:
> > So the IGNORE_LIST is intended for devices that may or may not be
> > present, and neither state is considered an error?
>
> Correct. And also for devices that may or may not be present, but are
> impossible to determine if they should/shouldn't be present, so its
> impossible to determine what an error case is (if that makes sense...).
>
> I gave a few examples in the original patch of when this might be
> useful. Most of the examples could be better solved by a more
> complicated, dynamically generated I2C_ADDR_LIST (eg detect if an XMC
> card is present, and if so, add device 0x50 to the list of expected
> devices), but it seems like overkill for a simple POST.

Now I understand your intention. I didn't when reading the description
in the initial commit message. Maybe you can make this a bit more
explicit for slow thinkers like me.

Best regards,

Wolfgang Denk

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