Systemd/src/login/70-power-switch.rules
Koen Kooi 492d7a3038 logind: add support for TPS65217 Power Button
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==""
2014-09-27 19:29:45 -04:00

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# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
ACTION=="remove", GOTO="power_switch_end"
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"
LABEL="power_switch_end"