LP87524J-Q1: programming, and clock synchronization questions

Part Number:LP87524J-Q1

Team, can you please help answer customer's questions:

1. For LP87524J PMIC register configuration, do we need a programming kit or is this done via the AWR1642?

2. I believe that LP87524J PMIC has an internal clock (please confirm).

3. PMIC Datasheet says that it supports switching clock synchronization to an external clock.  For instance, in my schematic PMIC clock is tied to AWR1642. Does this imply PMIC will be driven by AWR1642’s clock? If so, how does PMIC turn ON if it depends on AWR1642 to turn it ON while the AWR1642 is still OFF during initialization? 

Thanks!

Viktorija