Hi Lars, Thanks a lot for getting back to me. I've attached my code - it's pretty simple, I just copied an existing driver. As I mentioned individual reads are working fine (if i cat in_voltage0_raw) but buffered reads are failing. I've tracked the issue to industrialio-buffer.c in iio_compute_scan_bytes() which always returns zero because, i believe, the mask is 0. I haven't been able to find any docs on what 'scan masks' mean but I have seen a few drivers that supply available scan masks. Should I be specifying scan masks? Thanks! -chris On Wednesday, February 27, 2013 at 11:07 AM, Lars-Peter Clausen wrote: > On 02/26/2013 08:56 PM, Chris Micali wrote: > > Hello Lars, > > > > I'm doing a bit of hacking on a IIO driver based on some of your drivers on a 3.8 kernel (specifically writing a driver for a TI SPI adc.) I've been able to get a driver up and working such that I can read directly from the in_voltage0_raw on sysfs and get the correct values but I can't seem to get buffered access working (via iio_cmdsrv.) I've had a hard time finding any docs on this stuff and I was wondering if you could give me any pointers on where to look or who else perhaps to ask about this stuff? Any pointers would be very much appreciated! > > > > Thanks, > > Chris > > > > Hi, > > I'm afraid except for the the documentation in > drivers/staging/iio/Documentation/, the kernel doc comments and the skeleton > driver (drivers/staging/iio/iio_simple_dummy*) there is not much additional > documentation available. > > The general place to ask questions about IIO is the IIO mailinglist. I've > put it on CC, hope you don't mind. > > I think we can help you best if you post your code. > > - Lars
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