1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/usb/input/appletouch.c b/drivers/usb/input/appletouch.c
index 4825db4b2566..69c445620f15 100644
--- a/drivers/usb/input/appletouch.c
+++ b/drivers/usb/input/appletouch.c
@@ -47,6 +47,14 @@
 #define GEYSER3_ISO_PRODUCT_ID  0x0218
 #define GEYSER3_JIS_PRODUCT_ID  0x0219
 
+/*
+ * Geyser IV: same as Geyser III according to Info.plist in AppleUSBTrackpad.kext
+ * -> same IOClass (AppleUSBGrIIITrackpad), same acceleration tables
+ */
+#define GEYSER4_ANSI_PRODUCT_ID 0x021A
+#define GEYSER4_ISO_PRODUCT_ID  0x021B
+#define GEYSER4_JIS_PRODUCT_ID  0x021C
+
 #define ATP_DEVICE(prod)                                        \
         .match_flags = USB_DEVICE_ID_MATCH_DEVICE |             \
                        USB_DEVICE_ID_MATCH_INT_CLASS |          \
@@ -68,10 +76,16 @@ static struct usb_device_id atp_table [] = {
         { ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
         { ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
 
+        /* Core Duo MacBook & MacBook Pro */
         { ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
         { ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
         { ATP_DEVICE(GEYSER3_JIS_PRODUCT_ID) },
 
+        /* Core2 Duo MacBook & MacBook Pro */
+        { ATP_DEVICE(GEYSER4_ANSI_PRODUCT_ID) },
+        { ATP_DEVICE(GEYSER4_ISO_PRODUCT_ID) },
+        { ATP_DEVICE(GEYSER4_JIS_PRODUCT_ID) },
+
         /* Terminating entry */
         { }
 };
@@ -108,7 +122,7 @@ MODULE_DEVICE_TABLE (usb, atp_table);
  */
 #define ATP_THRESHOLD    5
 
-/* MacBook Pro (Geyser 3) initialization constants */
+/* MacBook Pro (Geyser 3 & 4) initialization constants */
 #define ATP_GEYSER3_MODE_READ_REQUEST_ID 1
 #define ATP_GEYSER3_MODE_WRITE_REQUEST_ID 9
 #define ATP_GEYSER3_MODE_REQUEST_VALUE 0x300
@@ -181,7 +195,10 @@ static inline int atp_is_geyser_3(struct atp *dev)
 
         return (productId == GEYSER3_ANSI_PRODUCT_ID) ||
                 (productId == GEYSER3_ISO_PRODUCT_ID) ||
-                (productId == GEYSER3_JIS_PRODUCT_ID);
+                (productId == GEYSER3_JIS_PRODUCT_ID) ||
+                (productId == GEYSER4_ANSI_PRODUCT_ID) ||
+                (productId == GEYSER4_ISO_PRODUCT_ID) ||
+                (productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,