[U-Boot] [PATCH] 7/12 Multiadapter/multibus I2C, drivers part 4

[Heiko Schocher]

Hello ksi,

ksi at koi8.net wrote:
> On Mon, 16 Feb 2009, Wolfgang Denk wrote:
> 
>> Dear ksi at koi8.net,
>>
>> In message <Pine.LNX.4.64ksi.0902152224290.17769 at home-gw.koi8.net> you wrote:
>>>> Yes, good point. But do we need more then one i2c adapter when running
>>>> from flash? I see only one reason to use i2c when running from flash:
>>>> accessing SPD EEprom ... and this "bus" could always be the first
>>>> hw adapter. All other accesses to i2c should be moved to run when
>>>> we are in ram.
>>> You can have, e.g. TWO SPD EEPROMs on different busses. And please remember
>>> that infamous "640K ought to be enough for anybody..."
>> This is a very unlikely hypothetical case. Based on such assumptions
>> you can design any arbitrary complexity in any code.
>>
>> For now, please lets assume that there is no such usage mode, and
>> that we do not add complexity to support it.
>>
>>
>>> I don't think there is a viable reason to object unless somebody came up
>>> with something better.
>> Well, complex code  that  is  difficult  to  read  and  difficult  to
>> understand is a very viable reason to object, me thinks.
> 
> The code is not all that complex. Most of the code is the same, there is
> just a thin HAL over it. And it is _NOT_ for reading two SPDs on different
> busses, it is for consistency and uniformity. Reading two SPDs is a free
> bonus, there is no a single line of additional code for this.

If the current pointer is writeable, this is also possible ...

bye
Heiko
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