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How to match GPIO number for export?


cvxx

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Hi,

 

Armbian_21.02.3_Odroidc1_focal_current_5.10.21

 

how do I find out which number do I need to provide to gpio export command?

Let's say I have physical pin 16, which is labeled by the manufacturer as `GPIOX.5` or `102`.

But that doesn't work with Armbian:

echo 102  > /sys/class/gpio/export

 

[ 1602.030617] export_store: invalid GPIO 102

How do I know the value to provide for /sys/class/gpio/export?

 

# cat /sys/kernel/debug/gpio
gpiochip1: GPIOs 413-428, parent: platform/c8100084.pinctrl, aobus-banks:
 gpio-416 (                    |TF_IO               ) out lo
 gpio-417 (                    |usb-hub-reset       ) out hi
 gpio-426 (                    |c1:blue:alive       ) out hi ACTIVE LOW

gpiochip0: GPIOs 429-511, parent: platform/c1109880.pinctrl, cbus-banks:
 gpio-456 (                    |regulator-tflash_vdd) out lo
 gpio-470 (                    |PHY reset           ) out hi ACTIVE LOW
 gpio-482 (                    |cd                  ) in  hi ACTIVE LOW
 gpio-492 (                    |reset               ) out hi ACTIVE LOW

Thanks

Edited by cvxx
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