Wanted to add /proc info:
purism@pureos:~$ cat /proc/bus/input/devices
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="gpio-keys"
P: Phys=gpio-keys/input0
S: Sysfs=/devices/platform/gpio-keys/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=c000000000000 0
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="bd718xx-pwrkey"
P: Phys=gpio-keys/input0
S: Sysfs=/devices/platform/soc@0/30800000.bus/30a20000.i2c/i2c-0/0-004b/gpio-keys.0.auto/input/input1
U: Uniq=
H: Handlers=kbd event1
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="pwm-vibrator"
P: Phys=
S: Sysfs=/devices/platform/vibrator/input/input2
U: Uniq=
H: Handlers=event2
B: PROP=0
B: EV=200001
B: FF=107030000 0
I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="30370000.snvs:snvs-powerkey"
P: Phys=snvs-pwrkey/input0
S: Sysfs=/devices/platform/soc@0/30000000.bus/30370000.snvs/30370000.snvs:snvs-powerkey/input/input3
U: Uniq=
H: Handlers=kbd event3
B: PROP=0
B: EV=3
B: KEY=10000000000000 0
I: Bus=0018 Vendor=0000 Product=0000 Version=0000
N: Name="EP0700M09"
P: Phys=
S: Sysfs=/devices/platform/soc@0/30800000.bus/30a40000.i2c/i2c-2/2-0038/input/input4
U: Uniq=
H: Handlers=event4 mouse0
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003
I: Bus=0018 Vendor=0000 Product=0000 Version=0000
N: Name="WM8962 Beep Generator"
P: Phys=2-001a
S: Sysfs=/devices/platform/soc@0/30800000.bus/30a40000.i2c/i2c-2/2-001a/input/input6
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=40001
B: SND=6
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="wm8962 Headphones"
P: Phys=ALSA
S: Sysfs=/devices/platform/sound/sound/card1/input5
U: Uniq=
H: Handlers=event6
B: PROP=0
B: EV=21
B: SW=4
purism@pureos:~$