/home/user # ls -la /sys/class/gpio/
total 0
drwxr-xr-x    2 root     root             0 Jan  1 01:00 .
drwxr-xr-x   64 root     root             0 Jan  1 01:00 ..
--w-------    1 root     root          4096 Jan  1 01:01 export
lrwxrwxrwx    1 root     root             0 Jan  1 01:01 gpio623 -> ../../devices/platform/soc@0/500000.pinctrl/gpiochip0/gpio/gpio623
lrwxrwxrwx    1 root     root             0 Jan  1 01:00 gpiochip512 -> ../../devices/platform/soc@0/500000.pinctrl/gpio/gpiochip512
lrwxrwxrwx    1 root     root             0 Jan  1 01:00 gpiochip626 -> ../../devices/platform/i2c1/i2c-0/0-0021/gpio/gpiochip626
lrwxrwxrwx    1 root     root             0 Jan  1 01:00 gpiochip634 -> ../../devices/platform/soc@0/1c40000.spmi/spmi-0/0-00/1c40000.spmi:pmic@0:gpio@c000/gpio/gpiochip634
lrwxrwxrwx    1 root     root             0 Jan  1 01:00 gpiochip643 -> ../../devices/platform/soc@0/1c40000.spmi/spmi-0/0-02/1c40000.spmi:pmic@2:gpio@c000/gpio/gpiochip643
--w-------    1 root     root          4096 Jan  1 01:00 unexport
/home/user # cat /sys/class/gpio/gpio623/value
0
/home/user # echo 1 > /sys/class/gpio/gpio623/value
/home/user # cat /sys/class/gpio/gpio623/value
0
/home/user # dmesg
...
[   79.856769] sm6115-tlmm 500000.pinctrl: request pin 111 (GPIO_111) for 500000.pinctrl:623
[   79.856803] gpio gpiochip0: Persistence not supported for GPIO 111