[PATCH 1/3] Input: Add new property INPUT_PROP_COMPOSITE
From: Roderick Colenbrander <hidden>
Date: 2017-08-18 02:02:09
Subsystem:
documentation, input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Jonathan Corbet, Dmitry Torokhov, Linus Torvalds
From: Roderick Colenbrander <roderick.colenbrander@sony.com> This new property can be set on subdevices part of a composite input device. The purpose of the constant is to notify other kernel components (e.g. joydev) and user space that a device is a composite device. Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com> --- Documentation/input/event-codes.rst | 12 ++++++++++++ include/uapi/linux/input-event-codes.h | 1 + 2 files changed, 13 insertions(+)
diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst
index a8c0873..d56a32e 100644
--- a/Documentation/input/event-codes.rst
+++ b/Documentation/input/event-codes.rst@@ -356,6 +356,18 @@ 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_COMPOSITE +-------------------- + +The functionality of some advanced input devices is exposed through several +event devices. For example a gamepad with motion sensors could be exposed as +a gamepad device with axes / buttons and a separate motion sensor device. + +The INPUT_PROP_COMPOSITE flag is set on all sub devices making up a larger +composite device. This flag allows user space applications in addition to +other kernel drivers (e.g. joydev) to easily determine whether a device +is part of a composite device. + Guidelines ==========
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 1798910..da3fa83 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h@@ -26,6 +26,7 @@ #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_COMPOSITE 0x07 /* is part of a composite device */ #define INPUT_PROP_MAX 0x1f #define INPUT_PROP_CNT (INPUT_PROP_MAX + 1)
--
2.9.4