[PATCH] HID: multitouch: Add support for Google Rose Touchpad

[Wei-Ning Huang <wnhuang@chromium.org>]

Add Google Rose Touchpad USB PID and required quirks.

Signed-off-by: Wei-Ning Huang <wnhuang@chromium.org>
---
 drivers/hid/hid-ids.h        |  3 +++
 drivers/hid/hid-multitouch.c | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 8ca1e8ce0af2..91c4a89615d7 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -425,6 +425,9 @@
 #define USB_VENDOR_ID_GOODTOUCH		0x1aad
 #define USB_DEVICE_ID_GOODTOUCH_000f	0x000f
 
+#define USB_VENDOR_ID_GOOGLE		0x18d1
+#define USB_DEVICE_ID_GOOGLE_TOUCH_ROSE	0x5028
+
 #define USB_VENDOR_ID_GOTOP		0x08f2
 #define USB_DEVICE_ID_SUPER_Q2		0x007f
 #define USB_DEVICE_ID_GOGOPEN		0x00ce
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 24d5b6deb571..5052aca8b984 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -161,6 +161,7 @@ static void mt_post_parse(struct mt_device *td);
 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS	0x0109
 #define MT_CLS_LG				0x010a
 #define MT_CLS_VTL				0x0110
+#define MT_CLS_GOOGLE				0x0111
 
 #define MT_DEFAULT_MAXCONTACT	10
 #define MT_MAX_MAXCONTACT	250
@@ -278,6 +279,12 @@ static struct mt_class mt_classes[] = {
 			MT_QUIRK_CONTACT_CNT_ACCURATE |
 			MT_QUIRK_FORCE_GET_FEATURE,
 	},
+	{ .name = MT_CLS_GOOGLE,
+		.quirks = MT_QUIRK_ALWAYS_VALID |
+			MT_QUIRK_CONTACT_CNT_ACCURATE |
+			MT_QUIRK_SLOT_IS_CONTACTID |
+			MT_QUIRK_HOVERING
+	},
 	{ }
 };
 
@@ -1569,6 +1576,11 @@ static const struct hid_device_id mt_devices[] = {
 		MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 			USB_DEVICE_ID_XIROKU_CSR2) },
 
+	/* Google MT devices */
+	{ .driver_data = MT_CLS_GOOGLE,
+		HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
+			USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
+
 	/* Generic MT device */
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
 
-- 
2.12.2