[net] ptp: update adjfreq callback description

[net] ptp: update adjfreq callback description

[Jeff Kirsher]

From: Jacob Keller <jacob.e.keller@intel.com>

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>
---
 include/linux/ptp_clock_kernel.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index f2dc6d8..38a9935 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -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.
-- 
1.7.11.7

Re: [net] ptp: update adjfreq callback description

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Thu,  1 Nov 2012 15:30:16 -0700

> From: Jacob Keller <jacob.e.keller@intel.com>
> 
> 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>

Applied.