From: Richard Cochran <richardcochran@gmail.com>
Date: Sun, 21 Dec 2014 18:46:57 +0000 (+0100)
Subject: timecounter: provide a helper function to shift the time.
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~134^2~328^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=796c1efd6fa0ed696d550b68f4410ab1a1749d01;p=pandora-kernel.git

timecounter: provide a helper function to shift the time.

Some PTP Hardware Clock drivers use a struct timecounter to represent
their clock. To adjust the time by a given offset, these drivers all
perform a two step read/write of their timecounter. However, it is
better and simpler just to adjust the offset in one step. This patch
introduces a little routine to help drivers implement the adjtime
method.

Suggested-by: Janusz Użycki <j.uzycki@elproma.com.pl>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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