I have a custom DTS I use for a custom cape on the BBB. The .dts file compiles well, I move the .dtbo to /lib/firmware, and then run
sudo update-initramfs -uk `uname -r` In /boot/uEnv.txt I have listed my custom overlay: cat /boot/uEnv.txt uname_r=4.4.16-bone-rt-r11 ####################uuid=81b9a3e8-1ff6-4797-b2eb-f4517ab96628 dtb=am335x-boneblack-emmc-overlay.dtb cape_enable=bone_capemgr.enable_partno=BB-APA-01,BB-ADC uuid=1b14b637-50ab-491b-9568-ace879cb1ef2 After the BBB boots I can see my pins muxed correctly. For example, in my .dts file I have a line for P9_17 to be an output, pulled, pulled: 0x15c 0x17 /* P9_17 87 | I can look at this pin and see GPIO 87 matches what my .dtbo is telling to be: cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pins | grep 87 pin 28 (44e10870.0) 00000026 pinctrl-single pin 29 (44e10874.0) 00000006 pinctrl-single pin 30 (44e10878.0) 0000000f pinctrl-single pin 31 (44e1087c.0) 0000000f pinctrl-single *pin 87 (44e1095c.0) 00000017 pinctrl-single * However, when the BBB boots and go export gpio 87 and look at its direction I see at as an input: root:gpio# echo 87 > export root:gpio# cat gpio87/direction in Why is that? Thanks in advance -- 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/47bb8b68-94ad-46ab-a84f-9f8577e7dd98%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
