i.MX8Mmini EVK SNVS RTC can't backup

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i.MX8Mmini EVK SNVS RTC can't backup

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Danube
Contributor IV

Hi

We test CPU SNVS RTC backup function. When we set "reboot" command.

We see CPU date in first login time.

BSP is Linux-4.14.78

We use 4.14.78 default demo image

Log file

NXP i.MX Release Distro 4.14-sumo imx8mmevk ttymxc1

imx8mmevk login: root
Last login: Fri May 10 10:22:35 UTC 2019 on tty7
[   10.340923] audit: type=1006 audit(1557483758.779:3): pid=3700 uid=0 old-auid=4294967295 auid=0 tty=(none) old-ses=4294967295 ses=2 res=1
root@imx8mmevk:~# date
Fri May 10 10:22:41 UTC 2019

~~~ Wait about 1 min

root@imx8mmevk:~# date
Fri May 10 10:23:42 UTC 2019


NXP i.MX Release Distro 4.14-sumo imx8mmevk ttymxc1

imx8mmevk login: root
Last login: Fri May 10 10:22:35 UTC 2019 on tty7
[   10.118980] audit: type=1006 audit(1557483758.671:3): pid=3703 uid=0 old-auid=4294967295 auid=0 tty=(none) old-ses=4294967295 ses=2 res=1
root@imx8mmevk:~# date
Fri May 10 10:22:39 UTC 2019

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weidong_sun
NXP TechSupport
NXP TechSupport

Hello Apollo,

  Operate RTC hardware, you should use "hwclock" command to update time in RTC.

Try it, please!
Have a nice day!

BR,

Weidong

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