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About Dennboy

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    The Netherlands
  • Interests
    high speed sensing, ADC, SPI, DMA, GPIO, hardware interrupts

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  1. Hi tparys, Thanks for your reply pointing to the upstream debian repo's, and sorry for posting an upstream bug here. I just looked up the dtc package in debian, and they appear to have it fixed in their newest update 1.4.7-4 from 27 january 2021 (see DTC debian changelog), it is now available in Armbian too, and seems to be working. Apparently it took some time to travel to the repo/mirrors, it wasn't yet available when I posted here. Kind regards, Dennis
  2. Dear all, My system logs: I consistency get a crash with dtc on both orangepi, nanopi neo+2, nanopi neo3 when I try to see the current devicetree via the filesystem, e.g.: $ dtc -I fs /sys/firmware/devicetree/base/ <stdout>: Warning (unit_address_vs_reg): /memory: node has a reg or ranges property, but no unit name <stdout>: Warning (clocks_property): /soc/spdif@1c21000:clocks: cell 0 is not a phandle reference <stdout>: Warning (clocks_property): /soc/spdif@1c21000:clocks: cell 2 is not a phandle reference .... /dts-v1/; / {
  3. I tried to override the interrupt affinity using a devicetree overlay, but also this seems to be ignored on sunxi. Anybody knows why? Is the affinity simply not implemented by sunxi? Below is the overlay to change the interrupt affinity. Devicetree before modification shows interrupt-affinity=<&cpu0>,<&cpu1>,<&cpu2>,<&cpu3>; /dts-v1/; /plugin/; / { compatible = "allwinner,sun8i-h3","allwinner,sun50i-h5","friendlyarm,nanopi-neo2"; fragment@1 { target-path = "/pmu"; __overlay__ {
  4. Hi, I experimented some further and set /proc/irq/default_smp_affinity to 1 for the first core, and it looks good on paper, but in practice most interrupts still go to the second core. echo 1 > /proc/irq/default_smp_affinity # dynamically load ADC kernel driver HomeCT2:~:% cat /proc/irq/162/smp_affinity 1 HomeCT2:~:% cat /proc/irq/162/effective_affinity 0 HomeCT2:~:% grep ads /proc/interrupts 66: 1397 0 0 0 sunxi_pio_edge 1 Edge ads131a04 162: 557 1394461 27 0 ads131a04-dev0 Edge ads131a04_cons
  5. Dear all, I'm frequently losing GPIO interrupts on various boards, which seem to be caused by bursty processes. When I shield the cores that have those interrupts according to /proc/interrupts with e..g. "cset shield --cpu=0,1" , way less interrupts are lost (e.g. for 4kHz interrupts one in hours instead of once per minute). Most of these (ADC) interrupts are handled by my own kernel module, but couldn't find how to restrict them to e.g. CPU0, and they are not movable using /proc/irq/*/smp_affinity. HomeCT1:~:% grep ads /proc/interrupts 66: 166559
  6. Hi Igor, Thanks very much for fixing this, building out-of-tree modules now works great in Armbian 20.02.1, on 5.10.12-sunxi (opi0) and 5.10.12-rockchip64 (neo3)! Kind regards, Dennis
  7. Yes Igor, for sure we are thankful for all your help here! I'm glad only toys got broken Hope you can teach your kid to repair toys some day I tried with the nanopineo2 (Armbian 20.11.6 Buster), the modules build fine but the installation reports SSL errors during installation of the module, that didn't appear on the orangepizero. The module(s) can be loaded and run after depmod -a. INSTALL pps_timer.ko At main.c:160: - SSL error:02001002:system library:fopen:No such file or directory: ../crypto/bio/bss_file.c:69 - SSL error:2006D080:BIO routines:BIO_new_file:no such file: ../cryp
  8. Hi @hjoe, Your fix seems to work beautifully on the orangepizero, thanks! My kernel module loads and runs beautifully. Tomorrow I'll try on nanopi neo2+ and neo3. @Igor Good luck with the family in these strange times. I hope things change for the best in the next months as more people get vacinated. Kind regards, Dennis
  9. Just retried with Armbian 20.11.7 kernel on nanopineo+2, but have the same issue on that board.
  10. Just retried with a very simple kernel module (added license in second attempt to get rid of kernel taint), with the same result. $ sudo modprobe ktest_module modprobe: ERROR: could not insert 'ktest_module': Exec format error $ dmesg|tail [ 24.151391] pps_timer: module PLT section(s) missing [ 33.784067] vcc3v0: disabling [ 33.784092] vcc5v0: disabling [ 33.784099] vcc-wifi: disabling [ 1413.944125] pps_timer: module PLT section(s) missing [ 7157.483985] ktest_module: module license 'unspecified' taints kernel. [ 7157.484004] Disabling lock debu
  11. Dear all, I can successfully build an out-of-tree module on 5.9 and 5.10.x kernels, but have trouble running them since Armbian 20.11.6. I fixed the missing problem using the receipt from a bugreport with an extra Makefile target: PWD=$(shell pwd) VER=$(shell uname -r) KERNEL_BUILD=/lib/modules/$(VER)/build # Later if you want to package the module binary you can provide an INSTALL_ROOT # INSTALL_ROOT=/tmp/install-root MY_CFLAGS += -g -DDEBUG # for newer 5.10.x kernels with x<=4 $(KERNEL_BUILD)/scripts/ $(KERNEL_BUILD)/scripts/ sudo
  12. Dear maintainers, I have my sensors configured to reboot every night via a user cronjob (0 0 * * * /sbin/reboot), 14 sensors do this without a problem. I've fixed the nanopi neo+2 reboot from NAND some months ago (by re-using friendlyarm first stage u-boot). I just stumbled upon a failed reboot with one of my nanopi neo+2 nodes, after two successful reboots. Looking at the /var/log.hdd/syslog, it got stuck in the shutdown procedure when the watchdog reported a failure. The /var/log.hdd/syslog.1 extracts below show the start of the watchdog, and the stop of the watchdog and it
  13. Hi Quanta, Depending on the type of serial connector, it may (partly) power the nanopi, I usually only connect the GND, RX and TX with my FT232RL USB to TTL Serial Adapter. I've seen cases where parts of the board didn't fully reset when the serial was still connected. You can of course start a separate thread about serial adaptor power issues, which may be a more general issue. My reboot problems however also seem to occur without the serial connected, i.e. can can notice it doesn't become reachable again after reboot is invoked remotely. Kind regards,
  14. Yes, I use the image from FriendlyArm mentioned on their website (in my case, I booted the image that was on the MMC when it got shipped, which is most likely the same one). To capture their first stage bootloader with dd, I analysed the nand-sata-install script to see what needed to be copied. It may be possible to directly fetch the bootloader part from the sdcard image, with a similar dd with if=sdcard.img when you have a linux PC. Since u-boot is opensource, we can probably ask FriendlyArm for their software/configuration changes to the first-stage u-boot in order to get this i
  15. Hi Quanta, Thanks for you reaction. In my case the (re)boot from sdcard do not fail, I only had failing EMMC re-boots. I think the older first stage u-boot from FriendlyArm is running at slower speed so there is less chance of failures. Your u-boot on the sdcard may be fixable with a similar procedure, i.e. by capturing the first stage u-boot bytes from FriendlyArm NEO image and writing it to the sdcard instead of the MMC I guess it would be possible to do this on a linux PC without first booting from the sdcard. Before changing the sdcard, you can of course make a backup on your hard-dri