On Sun, Jan 15, 2017 at 4:09 PM, Richard Ryniker <ryniker@xxxxxxxxxxxx> wrote: > Additional problem on Raspberry Pi (model 3): there is no: > > /sys/class/gpio The sysfs interface is deprecated [1] so I had disabled it on rawhide. I didn't intend on this change coming back into the stable releases but I must have screwed something up. It'll be back in F-25 with the 4.9.4 kernel which should be built today. > 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]# [1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0910d72afc69b25703f7be9bf7d13f18937a478 _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx
