Is the STM32F main PLL spread spectrum clocking enabled ?

[mirov]

Reading the datasheet I see that the part provides spread spectrum clocking for the main PLL. And there's some code in stm32f4xx_ll_rcc.h (for example) that seems to provide some support. But I haven't been able to find a place where it is actually utilized. It may help out with GPS desense and long lock times. My FC status reports clocks running at 48/96Mhz and if they are actually running at exactly those frequencies the harmonics will miss the GPS passband.

So is spread spectrum clocking actually turned on ?

-Russ