On 08/23/11 13:43, malas wrote: > YES : Gregs updated kernel taken from link below: > > http://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6.git Right now that's pretty much mainline. See comments below and please reply inline as it makes this sort of discussion much easier to follow. > > > On Tue, 23 Aug 2011 13:39:12 +0100, Jonathan Cameron wrote >> On 08/23/11 13:17, malas wrote: >>> >>> >>> Sorry, I did not explicitly mention that. I did use the new staging kernel referred by >>> Michael Hennerich and integrated with 2010RC5 uclinux dist . >> >> Hmm. As in current contents of Greg KH's staging/staging-next? >> >> I'll assume so... See below. >> >>> >>> 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. >> Ah, this does look like a missmatch in interfaces between userspace and kernel. >> >> At this point in time we have scrapped the event0 chrdev (done via polling on >> the access one) and the access one has be flattened into device0\:buffer0/ >> (read dev). >> >> Looks like the generic_buffer.c example does line up though. Where did the >> 'test iio-ring' come from? Is that one yours Michael? >>>>>> >>>>>>> >>>>>>> Please help. >>>>>>> >>>>>>> Thanks >>>>>>> Mala >>>>>>> -- >>>>>>> Open WebMail Project (http://openwebmail.org) >>> > > > -- > 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
