Input: add the ABS_MT_PRESSURE event

For pressure-based multi-touch devices, a direct way to send sensor
intensity data per finger is needed. This patch adds the ABS_MT_PRESSURE
event to the MT protocol.

Requested-by: Yoonyoung Shim <jy0922.shim@samsung.com>
Requested-by: Mika Kuoppala <mika.kuoppala@nokia.com>
Requested-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 30b503b..86cb2d2 100644 (file)
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -46,6 +46,7 @@ static unsigned int input_abs_bypass_init_data[] __initdata = {
        ABS_MT_TOOL_TYPE,
        ABS_MT_BLOB_ID,
        ABS_MT_TRACKING_ID,
+       ABS_MT_PRESSURE,
        0
 };
 static unsigned long input_abs_bypass[BITS_TO_LONGS(ABS_CNT)];

diff --git a/include/linux/input.h b/include/linux/input.h
index 7be8a65..735ceaf 100644 (file)
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -660,6 +660,7 @@ struct input_absinfo {
 #define ABS_MT_TOOL_TYPE       0x37    /* Type of touching device */
 #define ABS_MT_BLOB_ID         0x38    /* Group a set of packets as a blob */
 #define ABS_MT_TRACKING_ID     0x39    /* Unique ID of initiated contact */
+#define ABS_MT_PRESSURE                0x3a    /* Pressure on contact area */
 
 #define ABS_MAX                        0x3f
 #define ABS_CNT                        (ABS_MAX+1)