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Subject[PATCH 8/9 v4] Input: add BTN_TOOL_QUINTTAP for reporting 5 fingers on touchpad
Date
"4-finger scroll" is a gesture supported by some applications and
operating systems.

"Resting thumb" is when a clickpad user rests a finger (e.g., a
thumb), in a "click zone" (typically the bottom of the touchpad) in
anticipation of click+move=select gestures.

Thus, "4-finger scroll + resting thumb" is a 5-finger gesture.
To allow userspace to detect this gesture, we send BTN_TOOL_QUINTTAP.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Chase Douglas <chase.douglas@canonical.com>
---
drivers/input/input-mt.c | 1 +
include/linux/input.h | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
index c48c81f..9150ee7 100644
--- a/drivers/input/input-mt.c
+++ b/drivers/input/input-mt.c
@@ -117,6 +117,7 @@ void input_mt_report_finger_count(struct input_dev *dev, int count)
input_event(dev, EV_KEY, BTN_TOOL_DOUBLETAP, count == 2);
input_event(dev, EV_KEY, BTN_TOOL_TRIPLETAP, count == 3);
input_event(dev, EV_KEY, BTN_TOOL_QUADTAP, count == 4);
+ input_event(dev, EV_KEY, BTN_TOOL_QUINTTAP, count == 5);
}
EXPORT_SYMBOL(input_mt_report_finger_count);

diff --git a/include/linux/input.h b/include/linux/input.h
index 068784e..4de4b46 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -503,6 +503,7 @@ struct input_keymap_entry {
#define BTN_TOOL_FINGER 0x145
#define BTN_TOOL_MOUSE 0x146
#define BTN_TOOL_LENS 0x147
+#define BTN_TOOL_QUINTTAP 0x148 /* Five fingers on trackpad */
#define BTN_TOUCH 0x14a
#define BTN_STYLUS 0x14b
#define BTN_STYLUS2 0x14c
--
1.7.3.1


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