LKM shutdown

[Robert Cachro]

Hi,

We developed an LKM for the Beaglebone Black running Debian which runs an ISR that responds to power loss on a GPIO pin. The proper way to shutdown the beaglebone in user space is "sudo shutdown -h now". However, this does not work in linux kernel space. Our solution was to import 

#include <linux/reboot.h> 

and use 

kernel_power_off();

Is this the proper way to shutdown the Beaglebone in kernel space? Viewing the kern.log it seems to work but the status LEDs remain on.

Thanks,

Robert

[Robert Nelson]

It's actually an acpi call through the Real TIme Clock to properly
shut it down..

Ever since we moved to systemd, you can use:

sudo systemctl poweroff

Pre-Systemd era, we relied on the acpi package to be installed to
property shut things down..

so yeah, trace what "systemctl poweroff" does and then it'll work..

Regards,

--
Robert Nelson
https://rcn-ee.com/

[robert...@gmail.com]

As always very helpful.. Thank you Robert.