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1588 driver loses about 1us in adjtime operation at PTP slave This is because adjtime operation uses a slow non-atomic tmr_cnt_read() followed by tmr_cnt_write() operation. In the above sequence, since the timer counter operation keeps incrementing, it leads to latency. The tmr_offset register (which is added to TMR_CNT_H/L register giving the current time) must be programmed with the delta nanoseconds. Signed-off-by: Nikhil Gupta <nikhil.gupta@nxp.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20230119204034.7969-1-nikhil.gupta@nxp.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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| bestcomm | ||
| edac.h | ||
| enetc_mdio.h | ||
| ftm.h | ||
| guts.h | ||
| mc.h | ||
| ptp_qoriq.h | ||