On Tue, Aug 9, 2016 at 8:51 PM, Paul Knopf <pkn...@medxchange.com> wrote: > Hey guys, > > I am having an issue with trying to get my power button (i.MX6) to shutdown > the OS. > > My kernel has no configuration options for acpi, and acpid gives me the > following error: > > ------- > root@seco-uq7-dl-256mbx4:~# /usr/sbin/acpid > RTNETLINK1 answers: No such file or directory > acpid: error talking to the kernel via netlink > ------- > > So, my guess is that I have to use udev. If I use udevadm monitor, no events > get raised when I press the power switch. > > After digging through the kernel source code (Linux seco-uq7-dl-256mbx4 > 3.0.101 #1 SMP PREEMPT Thu Jun 2 10:49:45 PDT 2016 armv7l GNU/Linux) and the > imx6 drivers, I finally found something that may help me. > > 1. I found the power button driver in the OS at > /sys/bus/platform/drivers/imx_seco_pwrb. > > 2. Some more info that may be helpful. > > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/power_button/enable > disable > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/power_button/en_flash > disable > root@seco-uq7-dl-256mbx4:~# ls /sys/bus/platform/drivers/imx_seco_pwrb/ > bind uevent unbind > 3. I found /proc/ectrl/events/event_state/power_button which stores the > current state of the power button. > > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > active > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > active > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > active > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > inactive > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > inactive > root@seco-uq7-dl-256mbx4:~# cat /proc/ectrl/events/event_state/power_button > inactive > My embedded operating system is using sysvinit, if that helps. > > I effectively need the power button to perform a shutdown -h now. Any ideas > why it isn't currently? > > Thanks, > Paul Knopf > Software Engineer > Med X Change, Inc > pkn...@medxchange.com > > -- > _______________________________________________ > yocto mailing list > yocto@yoctoproject.org > https://lists.yoctoproject.org/listinfo/yocto >
>From what I read online this should be done in userspace. As I am not familiar with udev I made the following script: #!/bin/sh echo "monitoring poweroff key" cat /dev/input/by-path/platform-gpio-keys-event | read -n 1 echo "shutting down" /sbin/shutdown -hP now Regards, Mark -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
