umcs7840_get_reg_sync
err = umcs7840_get_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, &data);
static usb_error_t umcs7840_get_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t *);
umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_GPIO, &data);
if (!umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_MODE, &data)) {
if (umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, &data))
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data))
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data))
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))