gpiochi412 as example

`root@OpenWrt:~# ls /sys/class/gpio/`
`export gpio432 gpiochip412 unexport`

how can i wrote the code

`(change_gw@OpenWrt)8> gpio:open_chip("/dev/gpiochip412").`
`{error,enoent}`

`gpio:open_chip("/dev/gpiochip0").`
`{ok,#Ref<0.172490437.1821769745.83712>}`

`gpio:open_lines(Chip, [1], [output], [0], "my-application").`
`{error,16}`

`gpio:open_lines(Chip, [1], [output], [0], "my-application").`
`{error,ebadf}`

Start by reproducing the OpenWrt commands and the calls to gpio:open_chip/1 and gpio:open_lines/5 shown in the issue. Trace those entry points to determine why gpiochip412 returns enoent and the subsequent line operations return error 16 or ebadf. Done means identifying the cause and documenting a reproducible resolution for the reported device.

Written by the indexing model from the issue text.