736e5e5a35
There are some constraints to the oscillators on the samd5x. - DFLL is fixed to run at 48 MHz - DPLL can run at 96 to 200 MHz Always use DFLL for frequencies <= 48 MHz. For frequencies >= 96 MHz, use DPLL directly. For frequencies < 96 MHz, clock DPLL at twice the desired frequency and use a divider.