Additional problem on Raspberry Pi (model 3): there is no: /sys/class/gpio This does exist with the 4.8.15-300 kernel, but it has problems: [root@RPi3-1 gpiochip970]# echo 993 >/sys/class/gpio/export [root@RPi3-1 gpiochip970]# echo 1 > /sys/class/gpio/gpio993/value bash: echo: write error: Operation not permitted [root@RPi3-1 gpiochip970]# ls -l /sys/class/gpio/gpio993 lrwxrwxrwx. 1 root root 0 Jan 15 10:24 /sys/class/gpio/gpio993 -> ../../devices/platform/soc/3f200000.gpio/gpiochip0/gpio/gpio993 [root@RPi3-1 gpiochip970]# ls -l /sys/devices/platform/soc/3f200000.gpio/gpiochip0/gpio/gpio993 total 0 -rw-r--r--. 1 root root 4096 Jan 15 10:24 active_low lrwxrwxrwx. 1 root root 0 Jan 15 10:24 device -> ../../../gpiochip0 -rw-r--r--. 1 root root 4096 Jan 15 10:24 direction -rw-r--r--. 1 root root 4096 Jan 15 10:24 edge drwxr-xr-x. 2 root root 0 Jan 15 10:24 power lrwxrwxrwx. 1 root root 0 Jan 15 10:24 subsystem -> ../../../../../../../class/gpio -rw-r--r--. 1 root root 4096 Jan 15 10:24 uevent -rw-rw-rw-. 1 root root 4096 Jan 15 10:27 value [root@RPi3-1 gpiochip970]# echo 1 > /sys/devices/platform/soc/3f200000.gpio/gpiochip0/gpio/gpio993/value bash: echo: write error: Operation not permitted [root@RPi3-1 gpiochip970]# _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx
