[LinuxBIOS] SPD as debug channel

[Segher Boessenkool]

>> Since you need I2C, you need to get parts of the south bridge
>> working.
>
> Even though it's on the DIMM? Ugh. :(
>
>> So, its basically the same amount of work as with the USB debug
>> port.
>
> Yeah. Not much point to it then.

Well at least it's an I/O BAR instead of a memory BAR, quite a
bit easier to do portably.

>> Question is: Will we see systems without USB (debug port) but with
>> DDR2 sockets?
>
> See wiki page with list of EHCI chips that lack the debug port. On
> the other hand maybe all boards using them will have a serial port?

Lots of boards don't have USB...  Remember, the desktop market
is only a very small percentage of the total (Linux) market!


Segher