Re: [PATCH] i2c: mux: create proper topology in sysfs

Guenter Roeck
2014-11-04T14:16:37Z

On 11/03/2014 11:33 PM, Wolfram Sang wrote:
>>> What is your muxing setup?
>>>
>> Complicated ;-).
>
> ...
>
> Ooooookay... well, for testing these patches, your setup is absolutely
> awesome, of course :D May I ask what you are doing with that amount of
> I2C?
>

The HW folks are trying to have one bus per device. So a card with 48x10GE
needs 48 I2C busses, plus one or more busses for its other devices.

Some of the HW tends to block its I2C bus if looked at in a wrong way,
so that isn't actually too bad. The bus master selectors let either
one of the main controller CPUs or the CPU on a line card have access
to the bus.

Guenter