Hi Robert, You are talking about the edma not being registered for the SPI when using overlays, right?
I’ve been working on adding DMA to the IIO ADC driver and I came across the same problem. It seems like prepare_unused_channel_list is only called the first time edma_alloc_channel is called. In prepare_unused_channel_list, it scans the device tree for “dmas” & “dma-cells” and sets up the edma_cc[0]->edma_unused. So similar to the problem you have with SPI, I had to add the ADC spec into the base devicetree because the overlay would not work. Regards, John > On May 27, 2016, at 6:34 AM, Robert Nelson <robertcnel...@gmail.com> wrote: > > > > On Fri, May 27, 2016 at 8:29 AM, Mattt C <matthieu.cl...@gmail.com > <mailto:matthieu.cl...@gmail.com>> wrote: > Hi, > > I got the exact same problem. I use the DTBO BB-SPIDEV0 with linux kernel > 4.1.15. The pinmux of SPI pins doesn't change when I load the SPI overlay. I > tried loading I2C1, pin P9_18 change its pinmux. When I load SPIDEV0, it > doesn't. > > BB-SPIDEV0 needs to be loaded at bootup, not later, as it will fail if > manually loaded... > > add it to /boot/uEnv.txt > > cape_enable=bone_capemgr.enable_partno=BB-SPIDEV0 > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ <https://rcn-ee.com/> > > -- > For more options, visit http://beagleboard.org/discuss > <http://beagleboard.org/discuss> > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAOCHtYh%3DmV%2BPb48zEjy3Zqh2HN_kq_iCAZB2KCcfmdVhAWqUzA%40mail.gmail.com > > <https://groups.google.com/d/msgid/beagleboard/CAOCHtYh%3DmV%2BPb48zEjy3Zqh2HN_kq_iCAZB2KCcfmdVhAWqUzA%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/AF448155-FF26-44DB-AC2E-AA7632AA82BD%40gmail.com. For more options, visit https://groups.google.com/d/optout.
