[PATCH 4.19 040/118] HID: multitouch: Add pointstick support for Cirque Touchpad

[Greg Kroah-Hartman]

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 12d43aacf9a74d0eb66fd0ea54ebeb79ca28940f ]

Cirque Touchpad/Pointstick combo is similar to Alps devices, it requires
MT_CLS_WIN_8_DUAL to expose its pointstick as a mouse.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/hid/hid-ids.h        | 3 +++
 drivers/hid/hid-multitouch.c | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index a2d25055cd7f..b71c3600f470 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -271,6 +271,9 @@
 
 #define USB_VENDOR_ID_CIDC		0x1677
 
+#define I2C_VENDOR_ID_CIRQUE		0x0488
+#define I2C_PRODUCT_ID_CIRQUE_121F	0x121F
+
 #define USB_VENDOR_ID_CJTOUCH		0x24b8
 #define USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020	0x0020
 #define USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040	0x0040
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index da954f3f4da7..2faf5421fdd0 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1822,6 +1822,12 @@ static const struct hid_device_id mt_devices[] = {
 		MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 			USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 
+	/* Cirque devices */
+	{ .driver_data = MT_CLS_WIN_8_DUAL,
+		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
+			I2C_VENDOR_ID_CIRQUE,
+			I2C_PRODUCT_ID_CIRQUE_121F) },
+
 	/* CJTouch panels */
 	{ .driver_data = MT_CLS_NSMU,
 		MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
-- 
2.19.1