hidpp10: add Leds entry to .device file

For the device I have I do not see a way to get
this information by querying the device.

If the value is set in the .device file it will
override anything that the hidpp10 driver itself
would have found.

data/devices/data-parse-test.py

@@ -120,7 +120,7 @@ def check_profile_type_str(string):
 
 
 def check_section_hidpp10(section):
-    permitted = ['Profiles', 'ProfileType', 'DpiRange', 'DpiList', 'DeviceIndex']
+    permitted = ['Profiles', 'ProfileType', 'DpiRange', 'DpiList', 'DeviceIndex', 'Leds']
     for key in section.keys():
         assert(key in permitted)
 
@@ -155,6 +155,13 @@ def check_section_hidpp10(section):
     except KeyError:
         pass
 
+    try:
+        leds = int(section['Leds'])
+        # 10 is arbitrarily chosen
+        assert(leds > 0 and leds < 10)
+    except KeyError:
+        pass
+
 
 def check_section_hidpp20(section):
     permitted = ['DeviceIndex']

data/devices/device.example

@@ -42,6 +42,9 @@ DpiList=50;200;400;800
 # Should be unset unless required
 # DeviceIndex=1
 
+# The number of LEDs
+Leds=1
+
 
 [Driver/hidpp20]
 # The HID++ 2.0 device index