Touchpad recognized as ps/2 mouse

[Egor Kuzmichev]

On laptop ASUS X55A
FreeBSD 12-RELEASE
Touchpad recognized as ps/2 mouse, as a result, can`t disable
'tap-to-click',
enable scrolling and other touchpad-related options.

asus% dmesg|grep psm
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0

asus% sysctl -a |grep syna
hw.psm.synaptics_support: 1

asus% sudo libinput-list-devices
...
Device:           Generic PS/2 mouse
Kernel:           /dev/input/event3
Group:            4
Seat:             seat0, default
Capabilities:     pointer
Tap-to-click:     n/a
...