On Nov 07, 2016 12:57, Peter Rosin wrote: > On 2016-11-07 12:37, Daniel Baluta wrote: > > On Mon, Oct 24, 2016 at 1:39 AM, Peter Rosin <peda@xxxxxxxxxx> wrote: > >> From: Jonathan Cameron <jic23@xxxxxxxxxx> > >> > >> A large number of attributes can only take a limited range of values. > >> Currently in IIO this is handled by directly registering additional > >> *_available attributes thus providing this information to userspace. > >> > >> It is desirable to provide this information via the core for much the same > >> reason this was done for the actual channel information attributes in the > >> first place. If it isn't there, then it can only really be accessed from > >> userspace. Other in kernel IIO consumers have no access to what valid > >> parameters are. > >> > >> Two forms are currently supported: > >> * list of values in one particular IIO_VAL_* format. > >> e.g. 1.300000 1.500000 1.730000 > >> * range specification with a step size: > >> e.g. [1.000000 0.500000 2.500000] > >> equivalent to 1.000000 1.5000000 2.000000 2.500000 > > > > Is there any driver using this format? :) > > Yes, soon. Hopefully. See patch 3/8 > iio: mcp4531: provide range of available raw values > https://patchwork.kernel.org/patch/9391283/ I would also like to add this to mcp4131.c and ds1803.c. -- Slawomir Stepien -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
