--- zzzz-none-000/linux-3.10.107/Documentation/devicetree/bindings/leds/leds-pwm.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/devicetree/bindings/leds/leds-pwm.txt	2021-02-04 17:41:59.000000000 +0000
@@ -13,6 +13,8 @@
   For the pwms and pwm-names property please refer to:
   Documentation/devicetree/bindings/pwm/pwm.txt
 - max-brightness : Maximum brightness possible for the LED
+- active-low : (optional) For PWMs where the LED is wired to supply
+  rather than ground.
 - label :  (optional)
   see Documentation/devicetree/bindings/leds/common.txt
 - linux,default-trigger :  (optional)