The touchscreen drive is wacom, needn't idc file.
[ 999.540916] input: Wacom EHOMEWEI Finger as /devices/pci0000:00/0000:00:01.2/0000:01:00.0/usb1/1-1/1-1.1/1-1.1:1.0/0003:056A:0868.0006/input/input25
[ 999.541058] wacom 0003:056A:0868.0006: hidraw0: USB HID v1.10 Keyboard [EHOMEWEI EHOMEWEI] on usb-0000:01:00.0-1.1/input0
Wacom EHOMEWEI Finger can multi point touch.