stm32mp15x emmc reboot stuck-up

[MWoło.2]

Hi,

I have a problem with hanging up my board occasionally when an issue from the console reboot.

I read about and the internet says this is a problem with the EMMC memory's power cycle.

So I followed by a link

https://github.com/orangepi-xunlong/openwrt/commit/14d3a99e17f2ec6097eeef97530cba2d62c58d3c#diff-1335d7b270cc58c5342d5e2843730580bfe5d8048d765abb753050095929d85d

but still, after a few reboots my board stacked.

My final message from the console is as follows

 

[ OK ] Stopped Create Static Device Nodes in /dev. 
[ OK ] Reached target System Shutdown. 
[ OK ] Reached target Late Shutdown Services. 
[ OK ] Finished System Reboot. 
[ OK ] Reached target System Reboot. 
[ 32.494373] watchdog: watchdog0: watchdog did not stop! 
[ 32.522678] systemd-shutdown[1]: Using hardware watchdog 'STM32 Independent 0
[ 32.533457] systemd-shutdown[1]: Watchdog running with a timeout of 2min. 
[ 32.559399] systemd-shutdown[1]: Syncing filesystems and block devices. 
[ 32.687090] systemd-shutdown[1]: Sending SIGTERM to remaining processes... 
[ 32.713669] systemd-journald[685]: Received SIGTERM from PID 1 (systemd-shut.
[ 32.738780] systemd-shutdown[1]: Sending SIGKILL to remaining processes... 
[ 32.764536] systemd-shutdown[1]: Unmounting file systems. 
[ 32.774792] [1459]: Remounting '/' read-only with options 'n/a'. 
[ 32.798594] EXT4-fs (mmcblk1p8): re-mounted. Opts: (null). Quota mode: disab.
[ 32.825938] systemd-shutdown[1]: All filesystems unmounted. 
[ 32.830174] systemd-shutdown[1]: Deactivating swaps. 
[ 32.835585] systemd-shutdown[1]: All swaps deactivated. 
[ 32.840200] systemd-shutdown[1]: Detaching loop devices. 
[ 32.854929] systemd-shutdown[1]: All loop devices detached. 
[ 32.859153] systemd-shutdown[1]: Stopping MD devices. 
[ 32.865032] systemd-shutdown[1]: All MD devices stopped. 
[ 32.869346] systemd-shutdown[1]: Detaching DM devices. 
[ 32.875192] systemd-shutdown[1]: All DM devices detached. 
[ 32.879905] systemd-shutdown[1]: All filesystems, swaps, loop devices, MD de.
[ 32.924796] systemd-shutdown[1]: Syncing filesystems and block devices. 
[ 32.930334] systemd-shutdown[1]: Rebooting. 
[ 33.167515] reboot: Restarting system 
INFO: PSCI Power Domain Map: 
INFO: Domain Node : Level 1, parent_node -1, State ON (0x0) 
INFO: Domain Node : Level 0, parent_node 0, State ON (0x0) 
INFO: CPU Node : MPID 0x0, parent_node 0, State ON (0x0) 
INFO: CPU Node : MPID 0x1, parent_node 0, State ON (0x0) 

 

How to resolve this issue?

Thanks

BR

Michał

[PatrickF]

Hi @MWoło.2 

this might come up from a know limitation, not linked to eMMC.

In case your board did not use STPMIC1 for supply (which issue a power cycle on VDDCORE in case of reset), you should connect NRST to NRST_CORE with a 1nF capacitor as listed in ES0438 "Incorrect reset of glitch-free kernel clock switch" or AN5031 "Discrete supplies example 3.3 V I/Os with DDR3L"

Regards,

[MWoło.2]

Hi Patrick,

it's working. I take care of everything else without connecting through the cap that two mentioned NRST.

Thanks a lot, the topic can be closed.

Best Regards

Michał