Now that we have support for key/switch masking in logind, we can relax
the rules by which logind picks the devices to watch a bit, after all we
won't wake up anymore for every single event, but instead only the
events we actually care about.
This should make power/suspend keys on normal usb/atkbd keyboards just
work.
Adding additional keys prevents this gpio-keys powerswitch from working,
e.g. this wouldn't poweroff:
button@23 {
label = "power-switch";
linux,code = <116>;
gpios = <&gpio 23 1>;
};
button@25 {
label = "KEY_A";
linux,code = <30>;
gpios = <&gpio 25 1>;
};
Changing ATTRS{keys}=="116" to ATTRS{keys}=="*116*" makes the
power-switch and the A key both work properly.
(David: rephrase and merge-commits)
On Dell and HP laptops the dock state/events (SW_DOCK) come from the "{Dell,HP}
WMI hotkeys" input devices. Tag them as power-switch so that login actually
considers them. Use a general match in case this affects other vendors, too.
Thanks to Andreas Schultz for debugging this!
https://launchpad.net/bugs/1450009
Many boards like hisilicon D02 board use standard gpio key to power down system.
A description of gpio-key in dts shown below,
gpio_keys {
compatible = "gpio-keys";
#address-cells = <1>;
#size-cells = <0>;
pwrbutton {
label = "Power Button";
gpios = <&porta 8 1>;
linux,code = <116>; // KEY_POWER, used by SC System Power Down
};
};
-bash-4.3# udevadm info -a /dev/input/event3
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/platform/gpio_keys/input/input3/event3':
KERNEL=="event3"
SUBSYSTEM=="input"
DRIVER==""
looking at parent device '/devices/platform/gpio_keys/input/input3':
KERNELS=="input3"
SUBSYSTEMS=="input"
DRIVERS==""
ATTRS{name}=="gpio_keys"
ATTRS{phys}=="gpio-keys/input0"
ATTRS{uniq}==""
ATTRS{properties}=="0"
looking at parent device '/devices/platform/gpio_keys':
KERNELS=="gpio_keys"
SUBSYSTEMS=="platform"
DRIVERS=="gpio-keys"
ATTRS{keys}=="116"
ATTRS{switches}==""
ATTRS{driver_override}=="(null)"
ATTRS{disabled_keys}==""
ATTRS{disabled_switches}==""
looking at parent device '/devices/platform':
KERNELS=="platform"
SUBSYSTEMS==""
DRIVERS==""
This PMIC is found on TI AM335x based boards like the beaglebone and
beaglebone black.
root@beaglebone-white:~# 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/ocp.3/44e0b000.i2c/i2c-0/0-0024/input/input0/event0':
KERNEL=="event0"
SUBSYSTEM=="input"
DRIVER==""
looking at parent device
'/devices/ocp.3/44e0b000.i2c/i2c-0/0-0024/input/input0':
KERNELS=="input0"
SUBSYSTEMS=="input"
DRIVERS==""
ATTRS{name}=="tps65217_pwr_but"
ATTRS{phys}==""
ATTRS{uniq}==""
ATTRS{properties}=="0"
looking at parent device '/devices/ocp.3/44e0b000.i2c/i2c-0/0-0024':
KERNELS=="0-0024"
SUBSYSTEMS=="i2c"
DRIVERS=="tps65217"
ATTRS{name}=="tps65217"
looking at parent device '/devices/ocp.3/44e0b000.i2c/i2c-0':
KERNELS=="i2c-0"
SUBSYSTEMS=="i2c"
DRIVERS==""
ATTRS{name}=="OMAP I2C adapter"
looking at parent device '/devices/ocp.3/44e0b000.i2c':
KERNELS=="44e0b000.i2c"
SUBSYSTEMS=="platform"
DRIVERS=="omap_i2c"
looking at parent device '/devices/ocp.3':
KERNELS=="ocp.3"
SUBSYSTEMS=="platform"
DRIVERS==""
