Hi, I'm trying to hook up a PocketBeagle to a pololu Zumo chassis. After getting QEP0 to function I'm now struggling to get QEP2 going. Once I add the U-Boot overlay for it the PocketBeagle does not boot anymore. I'm guessing that I'm missing something in the device tree stuff for the PocketBeagle, and by now could use a nudge in the right direction :)
I verified that the hardware is ok by hooking things up to my old beaglebone white and the EQEP there reads things correctly. I'm using bone-debian-9.2-iot-armhf-2017-10-10-4gb.img with kernel 4.4.91-ti-r133 and the latest package updates. In my boot/uEnv.txt I have made the following changes: enable_uboot_overlays=1 uboot_overlay_addr0=/lib/firmware/pb_eqep0.dtbo #uboot_overlay_addr1=/lib/firmware/pb_eqep2.dtbo disable_uboot_overlay_emmc=1 disable_uboot_overlay_video=1 disable_uboot_overlay_audio=1 disable_uboot_overlay_wireless=1 #disable_uboot_overlay_adc=1 enable_uboot_cape_universal=1 For the pb_eqep0.dts I used the latest https://github.com/beagleboard/bb.org-overlays.git as a basis. With this overlay the eqep sysfs entries appear and the position can be read like on my BeagleBone. Once I uncomment the line with pb_eqep2.dtbo in the uEnv.txt the boot fails. I have collected the dts files and the u-boot output in this gist: https://gist.github.com/rklaren/09cf8a0a031a857421ae1501ca6d59dc I have tried: - just enabling the EQEP's by using config-pin but then the sysfs entries do not appear (or maybe something else needs to be disabled in the device-tree to make that work). - Merging the two dts/dtbo's but that leads to the same U-Boot output. Any pointers would be appreciated. Cheers, Ric -- 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/ba25a575-ea69-426a-aa17-3de09e54a06b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.