How can I turn off the power of imx8mq in uboot?

[huanxin_jiang]

How can I turn off the power of imx8mq in uboot? I tried setting TOP of SNVS LPCR register to 1 but it always trigger a reboot immediately. 

[igorpadykov]

Hi Huanxin

one can try to install R718 on EVK so PMIC_ON_REQ signal was

able to turn off pmic

Design Files for the i.MX 8M Evaluation Kit (EVKB)

Best regards
igor
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[karangajjar]

Hi Huanxin Jiang ,

Can you please let us know if you are using imx8MQ evk or custom board? As on i.MX8MQ evk, if we write 1 to TOP command board does goes to power off state.

Regards,

Karan Gajjar

[huanxin_jiang]

Thanks Karan and I can also turn off the board if I enter the uboot console and run a "mw" command to set the TOP bit. My failure happened at some later stage (later than the entry to the u-boot main loop) so I'll have a further check.

Huanxin