On Thu, Jan 17, 2019 at 05:34:34PM -0800, Richard Cochran wrote: > > @@ -17,6 +17,7 @@ Clock Properties: > > - fsl,tmr-fiper1 Fixed interval period pulse generator. > > - fsl,tmr-fiper2 Fixed interval period pulse generator. > > - fsl,max-adj Maximum frequency adjustment in parts per billion. > > + - fsl,extts-fifo Required if hardware uses external trigger stamp FIFO. > > Does this take a Boolean value? Please explain the semantics. How about this instead? The presence of this property indicates hardware support for the external trigger stamp FIFO. Thanks, Richard