from https://certification.ubuntu.com/hardware/201709-25724/
IEI Integration Corp DELL081C:00 044E:121F Touchpad


part of result of xinput --list :
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ DELL081C:00 044E:121F Mouse             	id=15	[slave  pointer  (2)]
⎜   ↳ DELL081C:00 044E:121F Touchpad          	id=16	[slave  pointer  (2)]
⎜   ↳ PixArt USB Optical Mouse                	id=12	[slave  pointer  (2)]
⎜   ↳ ELAN25B6:00 04F3:0732                   	id=14	[slave  pointer  (2)]
⎣

part of result of udevadm info -e :

P: /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:11/DLL081C:00
E: DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:11/DLL081C:00
E: MODALIAS=
E: SUBSYSTEM=acpi
P: /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:6b/DELL081C:00
E: DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:6b/DELL081C:00
E: ID_VENDOR_FROM_DATABASE=Dell Inc.
E: MODALIAS=acpi:DELL081C:PNP0C50:
E: SUBSYSTEM=acpi
E: USEC_INITIALIZED=20463825
P: /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00
E: DRIVER=i2c_hid
E: ID_VENDOR_FROM_DATABASE=Dell Inc.
E: MODALIAS=acpi:DELL081C:PNP0C50:
E: SUBSYSTEM=i2c
E: USEC_INITIALIZED=21698436


P: /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input23
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input23
E: EV=17
E: ID_FOR_SEAT=input-pci-0000_00_15_1-platform-i2c_designware_1
E: ID_INPUT=1
E: ID_INPUT_MOUSE=1
E: ID_PATH=pci-0000:00:15.1-platform-i2c_designware.1
E: ID_PATH_TAG=pci-0000_00_15_1-platform-i2c_designware_1
E: ID_SERIAL=noserial
E: KEY=70000 0 0 0 0
E: MODALIAS=input:b0018v044Ep121Fe0100-e0,1,2,4,k110,111,112,r0,1,6,8,am4,lsfw
E: MSC=10
E: NAME="DELL081C:00 044E:121F Mouse"
E: PHYS="i2c-DELL081C:00"
E: PRODUCT=18/44e/121f/100
E: PROP=0
E: REL=143
E: SUBSYSTEM=input
E: TAGS=:seat:
E: UNIQ=""
E: USEC_INITIALIZED=21719684

P: /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input24
E: ABS=260800000000003
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input24
E: EV=1b
E: ID_FOR_SEAT=input-pci-0000_00_15_1-platform-i2c_designware_1
E: ID_INPUT=1
E: ID_INPUT_TOUCHPAD=1
E: ID_PATH=pci-0000:00:15.1-platform-i2c_designware.1
E: ID_PATH_TAG=pci-0000_00_15_1-platform-i2c_designware_1
E: ID_SERIAL=noserial
E: KEY=e520 30000 0 0 0 0
E: MODALIAS=input:b0018v044Ep121Fe0100-e0,1,3,4,k110,111,145,148,14A,14D,14E,14F,ra0,1,2F,35,36,39,m5,lsfw
E: MSC=20
E: NAME="DELL081C:00 044E:121F Touchpad"
E: PHYS="i2c-DELL081C:00"
E: PRODUCT=18/44e/121f/100
E: PROP=1
E: SUBSYSTEM=input
E: TAGS=:seat:
E: UNIQ=""
E: USEC_INITIALIZED=21719800

P: /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input24/event20
N: input/event20
S: input/by-path/pci-0000:00:15.1-platform-i2c_designware.1-event-mouse
E: DEVLINKS=/dev/input/by-path/pci-0000:00:15.1-platform-i2c_designware.1-event-mouse
E: DEVNAME=/dev/input/event20
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00/0018:044E:121F.0005/input/input24/event20
E: ID_INPUT=1
E: ID_INPUT_HEIGHT_MM=49
E: ID_INPUT_TOUCHPAD=1
E: ID_INPUT_WIDTH_MM=99
E: ID_PATH=pci-0000:00:15.1-platform-i2c_designware.1
E: ID_PATH_TAG=pci-0000_00_15_1-platform-i2c_designware_1
E: ID_SERIAL=noserial
E: LIBINPUT_DEVICE_GROUP=18/44e/121f:i2c-DELL081C:00
E: LIBINPUT_MODEL_TOUCHPAD_VISIBLE_MARKER=1
E: MAJOR=13
E: MINOR=84
E: SUBSYSTEM=input
E: USEC_INITIALIZED=21778372

P: /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-8/i2c-DELL081C:00
E: DRIVER=i2c_hid
E: ID_VENDOR_FROM_DATABASE=Dell Inc.
E: MODALIAS=acpi:DELL081C:PNP0C50:
E: SUBSYSTEM=i2c
E: USEC_INITIALIZED=21698436



P: /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:6a/ELAN25B6:00
E: DEVPATH=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:6a/ELAN25B6:00
E: ID_VENDOR_FROM_DATABASE=ELAD srl
E: MODALIAS=acpi:ELAN25B6:PNP0C50:
E: SUBSYSTEM=acpi
E: USEC_INITIALIZED=20463631

P: /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-7/i2c-ELAN25B6:00
E: DEVPATH=/devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-7/i2c-ELAN25B6:00
E: DRIVER=i2c_hid
E: ID_VENDOR_FROM_DATABASE=ELAD srl
E: MODALIAS=acpi:ELAN25B6:PNP0C50:
E: SUBSYSTEM=i2c
E: USEC_INITIALIZED=21695963