Commit 7075ae4a authored by Angela Czubak's avatar Angela Czubak Committed by Benjamin Tissoires
Browse files

Input: add INPUT_PROP_HAPTIC_TOUCHPAD 



INPUT_PROP_HAPTIC_TOUCHPAD property is to be set for a device with simple
haptic capabilities.

Signed-off-by: default avatarAngela Czubak <aczubak@google.com>
Co-developed-by: default avatarJonathan Denose <jdenose@google.com>
Signed-off-by: default avatarJonathan Denose <jdenose@google.com>
Acked-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarBenjamin Tissoires <bentiss@kernel.org>
parent 08a72a22

Documentation/input/event-codes.rst

+14 −0
Original line number Diff line number Diff line
@@ -400,6 +400,20 @@ can report through the rotational axes (absolute and/or relative rx, ry, rz). 
All other axes retain their meaning. A device must not mix

regular directional axes and accelerometer axes on the same event node.



INPUT_PROP_HAPTIC_TOUCHPAD

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



The INPUT_PROP_HAPTIC_TOUCHPAD property indicates that device:

- supports simple haptic auto and manual triggering

- can differentiate between at least 5 fingers

- uses correct resolution for the X/Y (units and value)

- reports correct force per touch, and correct units for them (newtons or grams)

- follows the MT protocol type B



Summing up, such devices follow the MS spec for input devices in

Win8 and Win8.1, and in addition support the Simple haptic controller HID table,

and report correct units for the pressure.



Guidelines

==========

include/uapi/linux/input-event-codes.h

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@@ -27,6 +27,7 @@ 
#define INPUT_PROP_TOPBUTTONPAD		0x04	/* softbuttons at top of pad */

#define INPUT_PROP_POINTING_STICK	0x05	/* is a pointing stick */

#define INPUT_PROP_ACCELEROMETER	0x06	/* has accelerometer */

#define INPUT_PROP_HAPTIC_TOUCHPAD	0x07	/* is a haptic touchpad */



#define INPUT_PROP_MAX			0x1f

#define INPUT_PROP_CNT			(INPUT_PROP_MAX + 1)