How to turn on nrf5340 DCDC

[Август]

Hello,

Here is my work env.

NCS: v1.5.0

board: nrf5340dk

I found this way to open DCDC，but the nRF5340_PS_v1.0.pdf said  these register are Retained.Can you give me some advice.

NRF_REGULATORS_S->VREGRADIO.DCDCEN=REGULATORS_VREGRADIO_DCDCEN_DCDCEN_Enabled;
NRF_REGULATORS_S->VREGMAIN.DCDCEN=REGULATORS_VREGMAIN_DCDCEN_DCDCEN_Enabled;