Add support to set autosuspend delay via hwdb

hwdb.d/60-autosuspend.hwdb

@@ -24,8 +24,12 @@
 #
 # Allowed properties are:
 #    ID_AUTOSUSPEND=1
+#    ID_AUTOSUSPEND_DELAY_MS=####
 #    ID_PERSIST=0
 #
+# ID_AUTOSUSPEND_DELAY_MS adjusts the delay for autosuspend to something
+# different than the kernel default of 2000ms.
+#
 # ID_PERSIST=0 allows disabling the kernels USB "persist" feature, which allows
 # the continued use of devices after a power loss (due to suspend). Disable it
 # if the device will loose state without a USB power session and the driver

hwdb.d/parse_hwdb.py

@@ -135,6 +135,7 @@ def property_grammar():
              ('MOUSE_WHEEL_CLICK_COUNT', INTEGER),
              ('MOUSE_WHEEL_CLICK_COUNT_HORIZONTAL', INTEGER),
              ('ID_AUTOSUSPEND', Or((Literal('0'), Literal('1')))),
+             ('ID_AUTOSUSPEND_DELAY_MS', INTEGER),
              ('ID_AV_PRODUCTION_CONTROLLER', Or((Literal('0'), Literal('1')))),
              ('ID_PERSIST', Or((Literal('0'), Literal('1')))),
              ('ID_PDA', Or((Literal('0'), Literal('1')))),

rules.d/60-autosuspend.rules

@@ -15,4 +15,8 @@ ENV{ID_AUTOSUSPEND}=="1", TEST=="power/control", \
 ENV{ID_PERSIST}=="0", TEST=="power/persist", \
   ATTR{power/persist}="0"
 
+# Set up an autosuspend delay if hwdb say so
+ENV{ID_AUTOSUSPEND_DELAY_MS}!="", TEST=="power/control", \
+  ATTR{power/autosuspend_delay_ms}="$env{ID_AUTOSUSPEND_DELAY_MS}"
+
 LABEL="autosuspend_end"