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-rw-r--r--Documentation/devicetree/bindings/ptp/ptp-qoriq.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt b/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
index c5d0e7998e2b..8e7f8551d190 100644
--- a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
+++ b/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
@@ -17,6 +17,8 @@ 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 The presence of this property indicates hardware
+ support for the external trigger stamp FIFO.
These properties set the operational parameters for the PTP
clock. You must choose these carefully for the clock to work right.