--- zzzz-none-000/linux-3.10.107/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt	2021-02-04 17:41:59.000000000 +0000
@@ -4,11 +4,9 @@
 - compatible: Must be "ti,<soc>-ehrpwm".
   for am33xx - compatible = "ti,am33xx-ehrpwm";
   for da850  - compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
-- #pwm-cells: Should be 3. Number of cells being used to specify PWM property.
-  First cell specifies the per-chip index of the PWM to use, the second
-  cell is the period in nanoseconds and bit 0 in the third cell is used to
-  encode the polarity of PWM output. Set bit 0 of the third in PWM specifier
-  to 1 for inverse polarity & set to 0 for normal polarity.
+- #pwm-cells: should be 3. See pwm.txt in this directory for a description of
+  the cells format. The only third cell flag supported by this binding is
+  PWM_POLARITY_INVERTED.
 - reg: physical base address and size of the registers map.
 
 Optional properties: