Dear Jonathan Cameron, The kernel version I am using is : --------------------------------------------------------------------- midas@ubuntu:~/Mala/Telemedicine/uclinux_source/uc2010_source/uclinux/2010R1$ svn info Path: . URL: svn://blackfin.uclinux.org/uclinux-dist/branches/2010R1 Repository Root: svn://blackfin.uclinux.org/uclinux-dist Repository UUID: 3e2a5524-39e8-4cb9-84a9-c49da69cba3a Revision: 10161 Node Kind: directory Schedule: normal Last Changed Author: vapier Last Changed Rev: 10136 Last Changed Date: 2011-04-02 22:36:15 +0530 (Sat, 02 Apr 2011) --------------------------------------------------------------------- Regards Mala On Tue, 23 Aug 2011 12:21:25 +0100, Jonathan Cameron wrote > On 08/23/11 09:18, malas wrote: > > > > Dear Michael Hennerich, > > > > > > I shall post iio quesris in this mail list as per your suggestions. > > > > AD7793 driver is built into kernel. The chip gets configured and am able to read data on > > continuous mode via spi interface using ad7793 driver at kernel level. > > > > While testing userspace test iio-ring to read data from ring buffer, generic_buffer code > > was executed, it proceeds till opening /sys/bus/iio/devices/device0:buffer0 and > > Read call fails. > Question 1: What's the kernel and where did you get it from? (Interfaces are moving > fast so it's plausible you've fallen in a hole where userspace wasn't matching > kernelspace). > > > > In fs I can list the iio device ad7793 with following properties get/set. > > > > root:/> ls /sys/bus/iio/devices/device0\:buffer0/ > > bytes_per_datum enable power subsystem > > dev length scan_elements uevent > > root:/> > > > > I find access0 and event0 missing in this list. Is that the reason for read() fails. > Yes. Question is why and without kernel version I don't know where to look > I'm afraid. > > > > > Please help. > > > > Thanks > > Mala > > -- > > Open WebMail Project (http://openwebmail.org) > > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- Open WebMail Project (http://openwebmail.org) -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
