umcs7840_set_reg_sync
err = umcs7840_set_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, data);
static usb_error_t umcs7840_set_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t);
if (umcs7840_set_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))