diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2012-11-01 12:30:16 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-26 12:14:07 -0800 |
| commit | 6e216b4a2fa0eada850c943e6834e8e635e2fb9c (patch) | |
| tree | d983ab2913b73493eb155d7ad28c5005ad02c8ea /include | |
| parent | 26a10f1df3311011e4317fafd33002309587d963 (diff) | |
ptp: update adjfreq callback description
commit 87f4d7c1d36f44b0822053b7e5dedc31fdd0ab99 upstream.
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: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 945704c2ed6..00b9e619717 100644 --- a/include/linux/ptp_clock_kernel.h +++ b/include/linux/ptp_clock_kernel.h @@ -50,7 +50,8 @@ 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. |