DC Power IN Power-ON Switch Reset Switch -- Batt Required

[pfeerick]

You can test if your powerbutton sends a keycode with evtest, the driver basically registers the button like another keyboard:

Code:

ubuntu@pine64:~$ sudo apt-get install evtest

Reading package lists... Done
Building dependency tree
Reading state information... Done
evtest is already the newest version (1:1.33-1).
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.

ubuntu@pine64:~$ sudo evtest

No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      sunxi-keyboard
/dev/input/event1:      axp81x-supplyer
/dev/input/event2:      sunxi-ths
/dev/input/event3:      audiocodec sunxi Audio Jack
/dev/input/event4:      sunxi_ir_recv
/dev/input/event5:      MCE IR Keyboard/Mouse (sunxi-rc-recv)

Select the device event number [0-5]: 1

Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "axp81x-supplyer"
Supported events:
 Event type 0 (EV_SYN)
 Event type 1 (EV_KEY)
   Event code 116 (KEY_POWER)
 Event type 2 (EV_REL)
Properties:
Testing ... (interrupt to exit)
Event: time 1466799328.888825, type 1 (EV_KEY), code 116 (KEY_POWER), value 1
Event: time 1466799328.888825, -------------- SYN_REPORT ------------
Event: time 1466799328.999256, type 1 (EV_KEY), code 116 (KEY_POWER), value 0
Event: time 1466799328.999256, -------------- SYN_REPORT ------------
Event: time 1466799329.630542, type 1 (EV_KEY), code 116 (KEY_POWER), value 1
Event: time 1466799329.630542, -------------- SYN_REPORT ------------
Event: time 1466799329.798206, type 1 (EV_KEY), code 116 (KEY_POWER), value 0
Event: time 1466799329.798206, -------------- SYN_REPORT ------------

ubuntu@pine64:~$

Thanks for that! Now I know my button is working!

So, next my next question is : Do you know any (simple!) way to get the pine64 to respond to it? I'm using debian, and would like to make it trigger a shutdown. I keeps seeing mention of xbindkeys seeming to be able to do this, but I want a headless machine to be able to do this, not one with X11.

Edit: So, after a little more digging, and coming across a wiki page about udev and sleep buttons, I sort of followed the instructions and ended up with this for a udev rule, and it works!

Code:

pfeerick@pine64:~$ more /etc/udev/rules.d/70-power-switch-my.rules
ACTION=="remove", GOTO="power_switch_my_end"
SUBSYSTEM=="input", KERNEL=="event1", ATTRS{name}=="axp81x-supplyer", TAG+="power-switch"
LABEL="power_switch_my_end"

I then executed the following commands to freshen things up, and voila... pressing the power button causes the pine64 to instantly start shutting down! Now to see if I can make it trigger a delayed shutdown - say with 1 minutes grace... 

Code:

sudo systemctl restart systemd-udevd
sudo udevadm trigger
sudo systemctl restart systemd-logind

As a side-note, connecting the battery can be annoying - when the battery is connected, when I tell the pine64 to poweroff / halt, it powers itself back up again.