How to upgrade Synaptics rmi_f34 driver online？

[chcmq]

config RMI4_F34 bool "RMI4 Function 34 (Device reflash)" select FW_LOADER help Say Y here if you want to add support for RMI4 function 34.

  Function 34 provides support for upgrading the firmware on the RMI4
  device via the firmware loader interface. This is triggered using a
  sysfs attribute.

How do I upgrade my new Synaptics rmi_f34 firmware？