From 568ebc5985f5d849814117e40967b5d2e739405c Mon Sep 17 00:00:00 2001
From: Dong Zhu <bluezhudong@gmail.com>
Date: Tue, 17 Sep 2013 15:32:35 +0800
Subject: [PATCH] ptp: add the PTP_SYS_OFFSET ioctl to the testptp program

This patch add a method into testptp.c to measure the time offset
between phc and system clock through the ioctl PTP_SYS_OFFSET.

Signed-off-by: Dong Zhu <bluezhudong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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