https://sunplus.atlassian.net/wiki/spaces/doc/pages/1081311234
F2S Board SP7021 GPIO Control LED - SP7021 Released Document - Confluence
gpio controlboardledreleaseddocument
https://snapcraft.io/docs/reference/interfaces/gpio-control-interface/
gpio-control interface - Snap documentation
The gpio-control interface provides privileged access to all aspects of GPIO pins. For accessing specific GPIO pins with limited scope, see The gpio interface...
gpio controlinterfacesnapdocumentation