[PATCH] Input: add short note about ABS_MISC+<n> axes
From: David Herrmann <hidden>
Date: 2013-12-16 15:23:43
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
We must not reassign those axes or we will break backwards-compat. Add a small note for that so we don't accidentally some day reuse these. Signed-off-by: David Herrmann <redacted> --- include/uapi/linux/input.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index a372627..da1125e 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h@@ -816,6 +816,10 @@ struct input_keymap_entry { #define ABS_MISC 0x28 +/* ABS_MISC+x is used by HID to assign to unknown axes. Note that they used to + * flow over into the MT definitions. For backwards-compatibility, we must + * not reassign [0x29-0x2e] */ + #define ABS_MT_SLOT 0x2f /* MT slot being modified */ #define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */ #define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */
--
1.8.5.1