how to enter SNVS or RTC mode on iMX8MM.
Section 3.1.6 on this document https://www.nxp.com/docs/en/nxp/data-sheets/IMX8MMCEC.pdf
says about a SNVS oower mode with just SNVS power rails active.
one can try linux poweroff command
thanks, i read that document, how to turn off these rails? Can it be done via Software?
for entering SNVS mode it is necessary to turn off all power supplies,
leave only VDD_SNVS_0P8 (0.8 V), NVCC_SNVS_1P8 (1.8 V) powered from
battery or other external source.