I believe GPIO is broken because the Raspbery Pi hardware platform is not correctly recognized, but I have not had available time to look carefully. [root@RPi3-1 ryniker]# uname -a Linux RPi3-1 4.8.4-301.fc25.armv7hl #1 SMP Tue Oct 25 02:01:39 UTC 2016 armv7l armv7l armv7l GNU/Linux Simple test to demonstrate failure: [root@RPi3-1 ryniker]# echo 23 >/sys/class/gpio/export bash: echo: write error: Invalid argument [root@RPi3-1 ryniker]# Suspicious symptom: look at /proc/cpuinfo and see: Hardware : Generic DT based system Revision : 0000 Serial : 00000000b9dd7fd3 Using Raspbian, where GPIO works, /proc/cpuinfo reports: Hardware : BCM2709 Revision : a22082 Serial : 00000000e0b59fb5 I suspect the required files may be present in Fedora, possibly one of these: /boot/dtb-4.8.4-301.fc25.armv7hl/bcm2836-rpi-2-b.dtb /boot/dtb-4.8.4-301.fc25.armv7hl/bcm2837-rpi-3-b.dtb but they may not be used because of some failure to correctly identify the hardware platform. On the other hand: [ryniker@RPi3-1 ~]$ echo $(cat /sys/firmware/devicetree/base/model) Raspberry Pi 3 Model B [ryniker@RPi3-1 ~]$ seems to get it right, therefore it is not complete failure to recognize the platform, maybe just a partial failure because names have evolved so some match fails. And it remains possible some configuration data is simply absent, or incorrect. _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx
