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-rw-r--r--Documentation/ABI/testing/sysfs-ptp20
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diff --git a/Documentation/ABI/testing/sysfs-ptp b/Documentation/ABI/testing/sysfs-ptp
index 05aeedf17794..44806a678f12 100644
--- a/Documentation/ABI/testing/sysfs-ptp
+++ b/Documentation/ABI/testing/sysfs-ptp
@@ -54,6 +54,26 @@ Description:
This file contains the number of programmable periodic
output channels offered by the PTP hardware clock.
+What: /sys/class/ptp/ptpN/n_pins
+Date: March 2014
+Contact: Richard Cochran <richardcochran@gmail.com>
+Description:
+ This file contains the number of programmable pins
+ offered by the PTP hardware clock.
+
+What: /sys/class/ptp/ptpN/pins
+Date: March 2014
+Contact: Richard Cochran <richardcochran@gmail.com>
+Description:
+ This directory contains one file for each programmable
+ pin offered by the PTP hardware clock. The file name
+ is the hardware dependent pin name. Reading from this
+ file produces two numbers, the assigned function (see
+ the PTP_PF_ enumeration values in linux/ptp_clock.h)
+ and the channel number. The function and channel
+ assignment may be changed by two writing numbers into
+ the file.
+
What: /sys/class/ptp/ptpN/pps_avaiable
Date: September 2010
Contact: Richard Cochran <richardcochran@gmail.com>