[PATCH] HID: multitouch: enable trackstick of Asus ExpertBook B2502

[Benjamin Tissoires <benjamin.tissoires@redhat.com>]

This device has a trackstick that is sent through the same HID device
than the touchpad.
Unfortunately there are 2 mice attached to that device descriptor, with
the first one for the touchpad when the second is for the trackstick.

Force all devices to be exported.

Cc: stable@vger.kernel.org # 5.8+
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2154204
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
 drivers/hid/hid-multitouch.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 91a4d3fc30e0..91ac72b32d45 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1860,6 +1860,12 @@ static const struct hid_device_id mt_devices[] = {
 			USB_VENDOR_ID_ASUSTEK,
 			USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
 
+	/* Asus ExpertBook with trackstick */
+	{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			USB_VENDOR_ID_ELAN,
+			0x3148) },
+
 	/* Atmel panels */
 	{ .driver_data = MT_CLS_SERIAL,
 		MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
-- 
2.38.1