Re: [RFC|PATCH][2.6] Additional i2c adapter flags for i2c client isolation

Philip Pokorny
2004-04-05T14:38:36Z

Adrian Cox wrote:

>On Sat, 2004-04-03 at 15:30, Jean Delvare wrote:
>
>
>
>>I'm not sure that the function you propose would be really useful. I
>>guess that most people don't load i2c chip drivers they don't need. The
>>class filter you propose, added to the different I2C addresses, should
>>do the rest.
>>
>>
>
>What about using two DVB cards of different models to record off one
>multiplex while watching another?
>
>Only an explicit list of which chips should be probed on each I2C bus is
>safe for this sort of system.
>
>
>
You might be able to use the ignore= and force= parameters to the i2c
drivers to accomplish this. With ignore you can prevent a driver from
scanning an address (specify -1 as the bus to ignore that address on all
busses) and with force you can specify which bus/address to find the
specific chip.

I haven't read the code in detail yet, but if force doesn't already
override ignore, it probably should. I can't think of reason why you
would want ignore to override a force directive.

:v)