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Subject[PATCH 2/4] input: bcm5974: Add quad-finger tapping
The integrated button on the new unibody Macbooks presents a need to
report explicit four-finger actions. Evidently, the finger pressing
the button is also touching the trackpad, so in order to fully support
three-finger actions, the driver must be able to report four-finger
actions. This patch adds a new button, BTN_TOOL_QUADTAP, which
achieves this.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
drivers/input/mouse/bcm5974.c | 4 +++-
include/linux/input.h | 1 +
2 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index e97462e..a170574 100644
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -258,6 +258,7 @@ static void setup_events_to_report(struct input_dev *input_dev,
__set_bit(BTN_TOOL_FINGER, input_dev->keybit);
__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
+ __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
__set_bit(BTN_LEFT, input_dev->keybit);
}

@@ -328,7 +329,8 @@ static int report_tp_state(struct bcm5974 *dev, int size)
input_report_key(input, BTN_TOUCH, dev->fingers > 0);
input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1);
input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2);
- input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers > 2);
+ input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3);
+ input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3);

input_report_abs(input, ABS_PRESSURE, abs_p);
input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
diff --git a/include/linux/input.h b/include/linux/input.h
index b86fb55..0082b24 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -443,6 +443,7 @@ struct input_absinfo {
#define BTN_STYLUS2 0x14c
#define BTN_TOOL_DOUBLETAP 0x14d
#define BTN_TOOL_TRIPLETAP 0x14e
+#define BTN_TOOL_QUADTAP 0x14f /* Four fingers on trackpad */

#define BTN_WHEEL 0x150
#define BTN_GEAR_DOWN 0x150
--
1.5.6.3


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