diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-01 11:36:42 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-08-01 14:35:51 -0700 |
| commit | 9ab5ec59c8a9cc0e4b94252b48200b6023c716aa (patch) | |
| tree | fa9084e9bbb9eaf85689723d1b6e2c957f095a57 /arch/tile/include/gxio/mpipe.h | |
| parent | 84e181ba3607a4e1175d929c346c72f9bfa1ab02 (diff) | |
tile: support PTP using the tilegx mPIPE (IEEE 1588)
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/tile/include/gxio/mpipe.h')
| -rw-r--r-- | arch/tile/include/gxio/mpipe.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/tile/include/gxio/mpipe.h b/arch/tile/include/gxio/mpipe.h index eb7fee41c9b6..e37cf4f0cffd 100644 --- a/arch/tile/include/gxio/mpipe.h +++ b/arch/tile/include/gxio/mpipe.h @@ -1854,4 +1854,18 @@ extern int gxio_mpipe_set_timestamp(gxio_mpipe_context_t *context, extern int gxio_mpipe_adjust_timestamp(gxio_mpipe_context_t *context, int64_t delta); +/** Adjust the mPIPE timestamp clock frequency. + * + * @param context An initialized mPIPE context. + * @param ppb A 32-bit signed PPB (Parts Per Billion) value to adjust. + * The absolute value of ppb must be less than or equal to 1000000000. + * Values less than about 30000 will generally cause a GXIO_ERR_INVAL + * return due to the granularity of the hardware that converts reference + * clock cycles into seconds and nanoseconds. + * @return If the call was successful, zero; otherwise, a negative error + * code. + */ +extern int gxio_mpipe_adjust_timestamp_freq(gxio_mpipe_context_t* context, + int32_t ppb); + #endif /* !_GXIO_MPIPE_H_ */ |