General SPI question

[Arnav Das]

Hi,

Thanks a lot and sorry for the mistakes. I have gone through the trm of the
adc as well as the omap driver. my question is that i want to interact the
adc to the board. now should i directly use the omap driver or should i mak
one of my own. if i make one of my own then i would like to know how would
the spi registers be changed by driver. should it include the omap2 driver
or is the fuctionality provided directly when i include spi.h.

another doubt: when and why is the spidev.c/h used?

i am deeply grateful towards you for helping me out
thanks
Arnav

On Fri, Apr 24, 2009 at 11:50 AM, David Brownell <david-b at pacbell.net>wrote:

> On Thursday 23 April 2009, Arnav Das wrote:
> > i am a newbie
>
> Lesson #1:  make sure your Subject: lines match the message
> topic (I did a partial repair) and don't post to the wrong
> list (e.g. PPC lists for OMAP questions).
>
>
> > and am doing a project on beagle board(running
> > omap3530). i am interfacing an adc(ads7886) to the beagleboard via
> > spi. need to know how the spi works
>
> Read the ads7886 data sheet, in this case.  It uses
> a subset of SPI ... no input commands, just a 12-bit
> sample returned each time chipselect pulses.
>
>
> > and how a module can access the
> > spi registers of the omap. if someones already made an adc driver can
> > they mail me?
>
> Use drivers/spi/omap2_mcspi.c on OMAP3 boards, at
> least to start with.  If you want streaming conversions
> you may want to use different modes than are currently
> supported by that driver.
>
> - Dave
>
>
>
>
>
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