Sorry, I did not explicitly mention that. I did use the new staging kernel referred by Michael Hennerich and integrated with 2010RC5 uclinux dist . On Tue, 23 Aug 2011 12:39:53 +0100, Hennerich, Michael wrote > malas wrote on 2011-08-23: > > > > > > Dear Jonathan Cameron, > > > > The kernel version I am using is : > > Didn't you say that you use the staging kernel? > > http://blackfin.uclinux.org/gf/project/uclinux-dist/forum/?_forum_action=MessageReply&message_id=102839&action=ForumBrowse > > Or copied drivers/staging/iio over to your Blackfin kernel tree? > > > > > --------------------------------------------------------------------- > > midas@ubuntu:~/Mala/Telemedicine/uclinux_source/uc2010_source/uclinux/2 > > 010R1$ 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 > >>> > > > > > > Greetings, > Michael > > -- > Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen > Sitz der Gesellschaft: Muenchen; Registergericht: Muenchen HRB 40368; > Geschaeftsfuehrer:Dr.Carsten Suckrow, Thomas Wessel, William A. Martin, > Margaret Seif -- 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
