NEXUS_REGISTER
if ((i2c->pcf8584_attachflags & NEXUS_REGISTER) != 0) {
i2c->pcf8584_attachflags |= NEXUS_REGISTER;
if ((smbus->smbus_attachflags & NEXUS_REGISTER) != 0) {
smbus->smbus_attachflags |= NEXUS_REGISTER;