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 -- 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
