Ошибки gpio (sysfs)

Контроллеры Wiren Board Wiren Board Smart Home rev. 3.5
1

Подскажите что значат данные ошибки:

[100050.040000] gpio-52 (sysfs): gpiod_request: status -16
[100050.040000] export_store: status -16
[100050.040000] gpio-50 (sysfs): gpiod_request: status -16
[100050.040000] export_store: status -16
[100050.040000] gpio-57 (sysfs): gpiod_request: status -16
[100050.040000] export_store: status -16
[100050.070000] gpio-54 (sysfs): gpiod_request: status -16
[100050.070000] export_store: status -16
[100050.070000] gpio-247 (sysfs): gpiod_request: status -16
[100050.070000] export_store: status -16
[100050.130000] gpio-246 (sysfs): gpiod_request: status -16
[100050.130000] export_store: status -16
[100050.130000] gpio-7 (sysfs): gpiod_request: status -16
[100050.130000] export_store: status -16
[100050.150000] gpio-6 (sysfs): gpiod_request: status -16
[100050.150000] export_store: status -16
[100050.150000] gpio-5 (sysfs): gpiod_request: status -16
[100050.150000] export_store: status -16
[100050.200000] gpio-1 (sysfs): gpiod_request: status -16
[100050.200000] export_store: status -16

Спасибо.

2

Предупреждение при экспорте о том, что gpio уже экспортировали раньше. Ничего плохого в этом нет.