TCPM separate power supply driver and cc manager

How would a TCPM-implementing device such as the fusb302 driver integrate with a buck-boost nvdc charger such as the bq25710?

I see the points here:
[Fusb302 driver](https://github.com/beagleboard/linux/blob/5ff7d8356e91ff8516c0bd37710829a7556b6790/drivers/usb/typec/tcpm/fusb302.c#L754 )
where you can turn on a declared "vbus" regulator or turn on "charge"?

and here:
[Tcpm driver](https://github.com/beagleboard/linux/blob/5ff7d8356e91ff8516c0bd37710829a7556b6790/drivers/usb/typec/tcpm/tcpm.c#L725)
that discusses setting limits and voltages.

But for a port that has a separate "charger" ic for managing the power (at least from the fusb) how can I attach the power control to the same tcpm driver?

I do see that there is a section for registering a power supply in tcpm, but it seems to be called from the section of the fusb302 driver that initializes the tcpm:
[Register Power Supply section](https://github.com/beagleboard/linux/blob/5ff7d8356e91ff8516c0bd37710829a7556b6790/drivers/usb/typec/tcpm/tcpm.c#L4634)
[Callout to above from port register that is called from fusb302 section](https://github.com/beagleboard/linux/blob/5ff7d8356e91ff8516c0bd37710829a7556b6790/drivers/usb/typec/tcpm/tcpm.c#L4724)

Any pointers are much appreciated!

Thanks!