hwdb: Make remote controllable lights work out-of-the-box

Give access to USB/Bluetooth lights such as the Logitech Litra family of
devices.

The Logitech devices in particular are accessible through USB
and Bluetooth.

hwdb.d/70-lights.hwdb

@@ -0,0 +1,24 @@
+# This file is part of systemd.
+#
+# Database for remote controllable lights that should be accessible to the seat owner,
+# such as Bluetooth or USB lights that are used in conjuction with the computer like
+# streaming lights.
+#
+# To add local entries, copy this file to
+#   /etc/udev/hwdb.d/
+# and add your rules there. To load the new rules execute (as root):
+#   systemd-hwdb update
+#   udevadm trigger
+
+################
+# Logitech
+################
+# Litra Beam
+bluetooth:v046dpc901*
+usb:v046dpc901*
+ ID_AV_LIGHTS=1
+
+# Litra Glow
+bluetooth:v046dpc900*
+usb:v046dpc900*
+ ID_AV_LIGHTS=1

hwdb.d/parse_hwdb.py

@@ -159,6 +159,7 @@ def property_grammar():
              ('ID_AUTOSUSPEND', Or((Literal('0'), Literal('1')))),
              ('ID_AUTOSUSPEND_DELAY_MS', INTEGER),
              ('ID_AV_PRODUCTION_CONTROLLER', Or((Literal('0'), Literal('1')))),
+             ('ID_AV_LIGHTS', Or((Literal('0'), Literal('1')))),
              ('ID_PERSIST', Or((Literal('0'), Literal('1')))),
              ('ID_PDA', Or((Literal('0'), Literal('1')))),
              ('ID_INPUT', id_input_setting),

rules.d/70-uaccess.rules.in

@@ -99,6 +99,10 @@ SUBSYSTEM=="hidraw", ENV{ID_AV_PRODUCTION_CONTROLLER}=="1", TAG+="uaccess"
 # This also allows accessing HID devices with the libusb backend of hidapi.
 SUBSYSTEM=="usb", ENV{ID_AV_PRODUCTION_CONTROLLER}=="1", TAG+="uaccess"
 
+# USB and Bluetooth controllable lights
+SUBSYSTEM=="hidraw", ENV{ID_AV_LIGHTS}=="1", TAG+="uaccess"
+SUBSYSTEM=="usb", ENV{ID_AV_LIGHTS}=="1", TAG+="uaccess"
+
 # Hardware wallets
 SUBSYSTEM=="usb", ENV{ID_HARDWARE_WALLET}=="1", TAG+="uaccess"
 SUBSYSTEM=="hidraw", ENV{ID_HARDWARE_WALLET}=="1", TAG+="uaccess"