AXP_SENSOR_VBUSV
sc->sc_sensor[AXP_SENSOR_VBUSV].units = ENVSYS_SVOLTS_DC;
sc->sc_sensor[AXP_SENSOR_VBUSV].state = ENVSYS_SINVALID;
sc->sc_sensor[AXP_SENSOR_VBUSV].flags = ENVSYS_FHAS_ENTROPY;
snprintf(sc->sc_sensor[AXP_SENSOR_VBUSV].desc,
sizeof(sc->sc_sensor[AXP_SENSOR_VBUSV].desc), "VBUS input voltage");
sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor[AXP_SENSOR_VBUSV]);
case AXP_SENSOR_VBUSV: