Steps to Lowest power

BBeck.1 · ‎2022-01-12

From my understanding of the documentation, my steps to lowest power (VBAT mode) on the STM32MP1-DK2 kit would be:

Connect Battery to VBAT
Set BREN in TF-A
Disable wake sources other than from PMIC and RTC
enter sleep via: "echo mem > /sys/power/state"

Is this correct? Am I missing any steps here?

Thanks,

Ben Beckwith

PatrickF · ‎2022-02-01

Hi @BBeck.1

Maybe DT need to be aligned in uBoot too.

Did you use the 'shutdown -h 0' command ?

Any console error/warning message or difference Vs default Starter Package DT?

Regards.

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PatrickF · ‎2022-02-02

Hi,

I got confirmation that it is working like I explained. TF-A device tree is enough.

Was double checked on ecosystems v3.0 and v3.1.

On DK1/DK2 board, you could check VDD shutdown on one of the BOOT switches with a voltmeter (GND point available next to it).

Regards.

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