quoted

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+	 * @dev: PHY device which has the LED
+	 * @index: Which LED of the PHY device or -1
+	 * @modes: bitmap of LED polarity modes
+	 *
+	 * Configure LED with all the required polarity modes in @modes
+	 * to make it correctly turn ON or OFF.

index == -1 should be explained.

If you are referring to the special way of setting the LED globally,
that is not a thing anymore. Rob pointed out that having the double
reference in DT is problematic and PHY driver should handle that
internally.

So it sounds like you need to change

quoted

quoted

+	 * @index: Which LED of the PHY device or -1

to remove the 'or -1'

   Andrew