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