Re: local macro

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On Wed, 6 Oct 2010 13:47:59 -0700, Guenter Roeck wrote:
> On Wed, 2010-10-06 at 15:54 -0400, Paul Thomas wrote:
> > > No, both of those are runtime options internal to the ads7871, and
> > > because we initiate a read by setting that register anyway there isn't
> > > any additional setup cost (at least there isn't any spi cost, there is
> > > a little additional code in show_voltage).
> > >
> > > Additionally gain & diff are initialized to a gain of 1 and single
> > > ended reads which will match how the driver works now.
> > >
> > > I'm open to other suggestions also.
> > >
> > > thanks,
> > > Paul
> > >
> > 
> > I had one other question. The chip gives you a valid conversion result
> > bit. Currently we're not checking it, if It's not a valid conversion,
> > then what should be returned?
> 
> Possibly EIO ?

Or EAGAIN if one can hope that the next conversion will be OK.


-- 
Jean Delvare

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