linux-kernel - [PATCH 7/8 v3] Input: add BTN_TOOL_QUINTTAP for reporting 5 fingers on touchpad

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Message-Id: <1313169407-4358-8-git-send-email-djkurtz@chromium.org>
Date:	Sat, 13 Aug 2011 01:16:46 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	chase.douglas@...onical.com, dmitry.torokhov@...il.com,
	rydberg@...omail.se
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	olofj@...omium.org, chris@...bagwell.com,
	Daniel Kurtz <djkurtz@...omium.org>
Subject: [PATCH 7/8 v3] Input: add BTN_TOOL_QUINTTAP for reporting 5 fingers on touchpad

"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@...omium.org>
Acked-by: Chase Douglas <chase.douglas@...onical.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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