[systemd-devel] [PATCH 2/2] logind: add support for gpio-keys Power Button

[Koen Kooi]

This might be too broad since it will listen on *all* gpio-keys based
input devices for a power button press, but such is life.

root at arietta-g25:~# udevadm info -a /dev/input/event0

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/keys/input/input0/event0':
    KERNEL=="event0"
    SUBSYSTEM=="input"
    DRIVER==""

  looking at parent device '/devices/keys/input/input0':
    KERNELS=="input0"
    SUBSYSTEMS=="input"
    DRIVERS==""
    ATTRS{name}=="keys"
    ATTRS{phys}=="gpio-keys/input0"
    ATTRS{uniq}==""
    ATTRS{properties}=="0"

  looking at parent device '/devices/keys':
    KERNELS=="keys"
    SUBSYSTEMS=="platform"
    DRIVERS=="gpio-keys"
    ATTRS{keys}=="116"
    ATTRS{switches}==""
    ATTRS{driver_override}=="(null)"
    ATTRS{disabled_keys}==""
    ATTRS{disabled_switches}==""
---
 src/login/70-power-switch.rules | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/login/70-power-switch.rules b/src/login/70-power-switch.rules
index 695d246..7bbe096 100644
--- a/src/login/70-power-switch.rules
+++ b/src/login/70-power-switch.rules
@@ -11,5 +11,6 @@ SUBSYSTEM=="input", KERNEL=="event*", SUBSYSTEMS=="acpi", TAG+="power-switch"
 SUBSYSTEM=="input", KERNEL=="event*", KERNELS=="thinkpad_acpi", TAG+="power-switch"
 SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="twl4030_pwrbutton", TAG+="power-switch"
 SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="tps65217_pwr_but", TAG+="power-switch"
+SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="keys", TAG+="power-switch"
 
 LABEL="power_switch_end"
-- 
1.9.0