Hi,
On Thu, Aug 07, 2014 at 05:27:56PM +0100, Jonathan Cameron wrote:
> >>>>> + + if (opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS) + return -EBUSY; + + if (chan->type != IIO_LIGHT)
> >>>>> + return -EINVAL; + + mutex_lock(&opt->lock); + + switch (mask) {
> >>>>
> >>>> is there no way to control the scale?
> >>>
> >>> yeah, but the HW does auto-scaling which works pretty well. Why would you want to control the scale manually ?
> >> On a slow device like this you probably wouldn't but for quicker devices the overhead of converting into a
> >> standard form in kernel might be excessive.
> >
> > hehe, even when you _do_ set the scale, you still have the top 4
> > bits as exponent, the difference is that you know what they are
> > before the conversion is done :-)
> Then you can junk them and let userspace use the known value to deal
> with the raw data.
alright, I'll leave that to a future patch then. Auto-ranging is so much
simpler.
--
balbi
Attachment:
signature.asc
Description: Digital signature
