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-rw-r--r--dts/include/dt-bindings/input/linux-event-codes.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/dts/include/dt-bindings/input/linux-event-codes.h b/dts/include/dt-bindings/input/linux-event-codes.h
index 3eb5a4c..ae366b8 100644
--- a/dts/include/dt-bindings/input/linux-event-codes.h
+++ b/dts/include/dt-bindings/input/linux-event-codes.h
@@ -752,6 +752,15 @@
#define ABS_MISC 0x28
+/*
+ * 0x2e is reserved and should not be used in input drivers.
+ * It was used by HID as ABS_MISC+6 and userspace needs to detect if
+ * the next ABS_* event is correct or is just ABS_MISC + n.
+ * We define here ABS_RESERVED so userspace can rely on it and detect
+ * the situation described above.
+ */
+#define ABS_RESERVED 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) */