hwdb: deprecate the POINTINGSTICK_CONST_ACCEL property

The only known consumer of this property was libinput but it stopped using
this property since libinput 1.9 (released Oct 2017). This property is
arguably not one that should be in systemd anyway - it's not a
hardware-specific property but rather a factor of the acceleration method
employed by whatever userspace handles the events.

Deprecate it but leave the values in place for backwards compatibility.

diff --git a/hwdb/70-pointingstick.hwdb b/hwdb/70-pointingstick.hwdb
index 3f070e09de7f852efc8cabcf83d0ec8f65975f2d..f997912beb3fc5e22c59a944bc2b417cd04d0ee3 100644 (file)
--- a/hwdb/70-pointingstick.hwdb
+++ b/hwdb/70-pointingstick.hwdb
@@ -43,7 +43,7 @@
 #   udevadm info /dev/input/eventXX.
 #
 # Allowed properties are:
-#   POINTINGSTICK_CONST_ACCEL
+#   POINTINGSTICK_CONST_ACCEL (deprecated)
 #   POINTINGSTICK_SENSITIVITY
 #
 # Entries should be sorted with growing _SENSITIVITY and _CONST_ACCEL.
@@ -52,6 +52,11 @@
 #      POINTINGSTICK_CONST_ACCEL        #
 #########################################
 #
+# DO NOT USE THIS PROPERTY. This property is kept for backwards
+# compatibility. The only known consumer, libinput, stopped reading this
+# property in version 1.9.0. No new entries for this property should be
+# added.
+#
 # Trackpoint const accel settings are specified as
 #    POINTINGSTICK_CONST_ACCEL=<accel>
 #