Commit 87f4d7c1 authored Nov 01, 2012 by Jacob Keller Committed by David S. Miller Nov 03, 2012

ptp: update adjfreq callback description



This patch updates the adjfreq callback description to include a note that the
delta in ppb is always relative to the base frequency, and not to the current
frequency of the hardware clock.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
CC: stable@vger.kernel.org [v3.5+]
CC: Richard Cochran <richard.cochran@gmail.com>
CC: John Stultz <john.stultz@linaro.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 0481776b

include/linux/ptp_clock_kernel.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -54,7 +54,8 @@ struct ptp_clock_request {
		* clock operations
		*
		* @adjfreq: Adjusts the frequency of the hardware clock.
		* parameter delta: Desired period change in parts per billion.
		* parameter delta: Desired frequency offset from nominal frequency
		* in parts per billion
		*
		* @adjtime: Shifts the time of the hardware clock.
		* parameter delta: Desired change in nanoseconds.