[PATCH v3 03/11] Input: add INPUT_PROP_HAPTIC_TOUCHPAD
From: Jonathan Denose <hidden>
Date: 2025-08-18 23:10:44
Also in:
linux-doc, lkml
Subsystem:
documentation, input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Jonathan Corbet, Dmitry Torokhov, Linus Torvalds
From: Angela Czubak <redacted> INPUT_PROP_HAPTIC_TOUCHPAD property is to be set for a device with simple haptic capabilities. Signed-off-by: Angela Czubak <redacted> Co-developed-by: Jonathan Denose <redacted> Signed-off-by: Jonathan Denose <redacted> --- Documentation/input/event-codes.rst | 14 ++++++++++++++ include/uapi/linux/input-event-codes.h | 1 + 2 files changed, 15 insertions(+)
diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst
index b4557462edd7b3fef9e9cd6c2c3cb2d05bb531ab..1ead9bb8d9c6451a81426665baab643f9e50216a 100644
--- a/Documentation/input/event-codes.rst
+++ b/Documentation/input/event-codes.rst@@ -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 ==========
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 3b2524e4b667d1e7cc02ff5cb674e7c2ac069a66..efe8c36d4ee9a938ffb1b0dd0ddd0ec6a3fcb8fe 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h@@ -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)
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2.51.0.rc1.193.gad69d77794-goog