> Sure, how about something like this:
> 
>                 /* TX clock internal delay mode is required for reliable
>                  * 1Gbps communication using the KSZ9031RNX phy present on
>                  * the Ebisu board, however, TX clock internal delay mode
>                  * isn't supported on r8a77990.  Thus, limit speed to
>                  * 100Mbps for reliable communication.
>                  */
> 		max-speed = <100>;

Yes, I like it. If DTs have kernel coding style, there should be a blank
'/*' at the beginning.