for my ATSAMD51G18 I need exactly two things: a 120 MHz clock for the CPU core and 90 MHz for peripherals, both from an internal clock source. When I try to get this via Atmel START, the solution is really weird and incredibly complicated:
32 kHz OSCULP23K -> 32 kHz GCG3 -> 48 MHz DFLL48M -> 3.2 MHz GCG1 -> 120 MHz DPLL0 -> 120 Mhz GCG0 -> 120 Mhz CPU -> 90 MHz DPLL1 -> 90 Mhz GCG4 -> 90 MHz for peripherals
So...isn't there a more simple way to get these two clocks? May be with some non-START-code?