4b65cac846
via the new DIGIIO_SETALTPIN ioctl, and allow the port's ALTPIN setting to be queried via DIGIIO_GETALTPIN. The initial state and lock devices are normally used to set and/or lock ALTPIN settings although the device itself may also be used. ALTPIN settings are applied per-device and apply to both the callin and callout device at the same time.