--- On Wed, 9/1/10, Feng Tang <[email protected]> wrote:

> > 
> > What's the case where platform code could
> > know "better" than the driver?
> 
> Grant also asked me the same question.


I saw him ask a different question (which
I quoted) ...


 Yes, driver itself
> know the bits_per_word info best in most case, but there
> is
> some device (Option GTM501L spi modem) which supports
> multiple
> bits_per_mode option, and here platform code
is the good place to set it.


Not unless it knows which mode the driver uses...
a kind of layering violation.

> 
> So if we can set it before
> registering board info, then the second spi_setup can be
> removed for many drivers.

that doesn't seem to me like it'd be a startup
cost that's easily observed; hard for me to
worry about it, but I can see what you mean.


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