HP TP Key mapping
HP TouchPad's Key Mapping for Device Buttons
This page is under construction and is served as a reference page for now
event0 is the volume
event0 has 4 keys - KEY_VOLUMEDOWN, KEY_VOLUMEUP, KEY_REPLY and ?
event0 is multiple gpio keys
KEY_REPLY looks to be the home button
event0 they names are self-explanitory except KEY_REPLY is the home key
event1 is pmic8058_pwrkey
event2 is headset
power button tap hits KEY_END over event1
tapping power sends KEY_END over event1, holding it sends KEY_POWER
--event0 is on the CPU itself.
--event2 could be from the Audio Processor
evtest /dev/input/event0
Input driver version is 1.0.0
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio-keys"
Supported events:
Event type 0 (Sync)
Event type 1 (Key)
Event code 114 (VolumeDown) Event code 115 (VolumeUp) Event code 232 (Reply) Event code 249 (?)
event type 5 (?)
evtest /dev/input/event1
Input driver version is 1.0.0
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "pmic8058_pwrkey"
Supported events:
Event type 0 (Sync)
Event type 1 (Key)
Event code 107 (End) Event code 116 (Power)
evtest /dev/input/event2
Input driver version is 1.0.0
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "headset"
Supported events:
Event type 0 (Sync) Event type 1 (Key)
Event code 164 (PlayPause)
Event type 5 (?) Event code 2 (?) Event code 4 (?)
sysfs locations
udevadm info --query=all --name=/dev/input/event0
/devices/platform/gpio-keys/input/input0/event0
E: UDEV_LOG=3
E: DEVPATH=/devices/platform/gpio-keys/input/input0/event0
E: MAJOR=13
E: MINOR=64
E: DEVNAME=input/event0
E: SUBSYSTEM=input
root@CryptksTouchPad:/# udevadm info --query=all --name=/dev/input/event1
P: /devices/i2c-6/6-0055/pm8058-pwrkey/input/input1/event1
E: UDEV_LOG=3
E: DEVPATH=/devices/i2c-6/6-0055/pm8058-pwrkey/input/input1/event1
E: MAJOR=13
E: MINOR=65
E: DEVNAME=input/event1
E: SUBSYSTEM=input
root@CryptksTouchPad:/# udevadm info --query=all --name=/dev/input/event2
P: /devices/platform/soc-audio.0/sound/card0/input2/event2
E: UDEV_LOG=3
E: DEVPATH=/devices/platform/soc-audio.0/sound/card0/input2/event2
E: MAJOR=13
E: MINOR=66
E: DEVNAME=input/event2
E: SUBSYSTEM=input