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

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

From: Jussi Pakkanen <redacted>

commit 52965cc012f7a3cf35f06485ec275ebf3b3fddae upstream.

Some bcm5974 trackpads have a physical button beneath the physical surface.
This patch sets the property bit so user space applications can detect the
trackpad type and act accordingly.

Signed-off-by: Jussi Pakkanen <redacted>
Reviewed-by: Henrik Rydberg <redacted>
Signed-off-by: Dmitry Torokhov <redacted>
Cc: maximilian attems <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/input/mouse/bcm5974.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c

@@ -373,6 +373,9 @@ static void setup_events_to_report(struc
 	__set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
 	__set_bit(BTN_LEFT, input_dev->keybit);
 
+	if (cfg->caps & HAS_INTEGRATED_BUTTON)
+		__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
 	input_set_events_per_packet(input_dev, 60);
 }