ls -l /dev/gpio/
total 0
lrwxrwxrwx 1 root root 22 Nov  3 17:21 0 -> /sys/class/gpio/gpio32
lrwxrwxrwx 1 root root 22 Nov  3 17:21 1 -> /sys/class/gpio/gpio33
lrwxrwxrwx 1 root root 22 Nov  3 17:21 10 -> /sys/class/gpio/gpio26
lrwxrwxrwx 1 root root 23 Nov  3 17:21 105 -> /sys/class/gpio/gpio115
lrwxrwxrwx 1 root root 22 Nov  3 17:21 11 -> /sys/class/gpio/gpio27
lrwxrwxrwx 1 root root 22 Nov  3 17:21 12 -> /sys/class/gpio/gpio44
lrwxrwxrwx 1 root root 22 Nov  3 17:21 13 -> /sys/class/gpio/gpio45
lrwxrwxrwx 1 root root 22 Nov  3 17:21 14 -> /sys/class/gpio/gpio46
lrwxrwxrwx 1 root root 22 Nov  3 17:21 15 -> /sys/class/gpio/gpio47
lrwxrwxrwx 1 root root 22 Nov  3 17:21 17 -> /sys/class/gpio/gpio49
lrwxrwxrwx 1 root root 22 Nov  3 17:21 18 -> /sys/class/gpio/gpio50
lrwxrwxrwx 1 root root 22 Nov  3 17:21 31 -> /sys/class/gpio/gpio61
lrwxrwxrwx 1 root root 22 Nov  3 17:21 32 -> /sys/class/gpio/gpio62
lrwxrwxrwx 1 root root 22 Nov  3 17:21 33 -> /sys/class/gpio/gpio63
lrwxrwxrwx 1 root root 22 Nov  3 17:21 35 -> /sys/class/gpio/gpio65
lrwxrwxrwx 1 root root 22 Nov  3 17:21 4 -> /sys/class/gpio/gpio36
lrwxrwxrwx 1 root root 22 Nov  3 17:21 40 -> /sys/class/gpio/gpio70
lrwxrwxrwx 1 root root 22 Nov  3 17:21 41 -> /sys/class/gpio/gpio71
lrwxrwxrwx 1 root root 22 Nov  3 17:21 42 -> /sys/class/gpio/gpio72
lrwxrwxrwx 1 root root 22 Nov  3 17:21 43 -> /sys/class/gpio/gpio73
lrwxrwxrwx 1 root root 22 Nov  3 17:21 44 -> /sys/class/gpio/gpio74
lrwxrwxrwx 1 root root 22 Nov  3 17:21 45 -> /sys/class/gpio/gpio75
lrwxrwxrwx 1 root root 22 Nov  3 17:21 46 -> /sys/class/gpio/gpio76
lrwxrwxrwx 1 root root 22 Nov  3 17:21 47 -> /sys/class/gpio/gpio77
lrwxrwxrwx 1 root root 22 Nov  3 17:21 5 -> /sys/class/gpio/gpio37
lrwxrwxrwx 1 root root 22 Nov  3 17:21 56 -> /sys/class/gpio/gpio86
lrwxrwxrwx 1 root root 22 Nov  3 17:21 57 -> /sys/class/gpio/gpio87
lrwxrwxrwx 1 root root 22 Nov  3 17:21 58 -> /sys/class/gpio/gpio88
lrwxrwxrwx 1 root root 22 Nov  3 17:21 59 -> /sys/class/gpio/gpio89
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P8_3 -> /sys/class/gpio/gpio38
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P8_4 -> /sys/class/gpio/gpio39
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P8_5 -> /sys/class/gpio/gpio34
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P8_6 -> /sys/class/gpio/gpio35
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P9_15 -> /sys/class/gpio/gpio48
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P9_19 -> /sys/class/gpio/gpio13
lrwxrwxrwx 1 root root 22 Nov  3 17:21 P9_20 -> /sys/class/gpio/gpio12