To use a GPIO pin, you need to know its PIN number.

GPIO PIN number calculation method: Number = Range Base + Pin Index

1. Range Base refers to the base value of GPIO ranges.

2. Pin Index refers to the sorting of the GPIO pins you need to calculate in the corresponding ranges.

1. Get Range Base:

# cat /sys/kernel/debug/pinctrl/fe000000.apb4\:pinctrl\@4000-pinctrl-meson/gpio-ranges
GPIO ranges handled:
0: periphs-banks GPIOS [430 - 511] PINS [0 - 81]

2. Get Pin Index:

# cat /sys/kernel/debug/pinctrl/fe000000.apb4\:pinctrl\@4000-pinctrl-meson/pins
registered pins: 82
pin 22 (GPIOE_0)  fe000000.apb4:pinctrl@4000
pin 23 (GPIOE_1)  fe000000.apb4:pinctrl@4000
pin 0 (GPIOB_0)  fe000000.apb4:pinctrl@4000
pin 1 (GPIOB_1)  fe000000.apb4:pinctrl@4000
pin 2 (GPIOB_2)  fe000000.apb4:pinctrl@4000
pin 3 (GPIOB_3)  fe000000.apb4:pinctrl@4000
pin 4 (GPIOB_4)  fe000000.apb4:pinctrl@4000
...
pin 76 (GPIOZ_8)  fe000000.apb4:pinctrl@4000
pin 77 (GPIOZ_9)  fe000000.apb4:pinctrl@4000
pin 78 (GPIOZ_10)  fe000000.apb4:pinctrl@4000
...

3. Calculate Number:

Here is an example for GPIOZ_10:

GPIOZ_10 = Range Base + Pin Index = 430 + 78 = 508