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| author | Jacob Keller <jacob.e.keller@intel.com> | 2012-11-01 12:30:16 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-03 15:27:07 -0400 |
| commit | 87f4d7c1d36f44b0822053b7e5dedc31fdd0ab99 (patch) | |
| tree | 8dd58336991f514e7dcb00358e7e630f8718614e /include/linux/ptp_clock_kernel.h | |
| parent | 0481776b7a70f09acf7d9d97c288c3a8403fbfe4 (diff) | |
| download | lwn-87f4d7c1d36f44b0822053b7e5dedc31fdd0ab99.tar.gz lwn-87f4d7c1d36f44b0822053b7e5dedc31fdd0ab99.zip | |
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>
Diffstat (limited to 'include/linux/ptp_clock_kernel.h')
| -rw-r--r-- | include/linux/ptp_clock_kernel.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h index f2dc6d8fc680..38a993508327 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. |