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linux/drivers/ptp
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Nikhil Gupta 24a7fffb25 ptp_qoriq: fix latency in ptp_qoriq_adjtime() operation 
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>
2023-01-20 18:20:38 -08:00
..
Kconfig ptp: ocp: Select CRC16 in the Kconfig. 2022-07-27 18:11:34 -07:00
Makefile ptp: add ptp virtual clock driver framework 2021-07-01 13:08:18 -07:00
ptp_chardev.c ptp: only allow phase values lower than 1 period 2020-08-05 12:06:44 -07:00
ptp_clock.c ptp: remove the .adjfreq interface function 2022-11-11 10:58:39 +00:00
ptp_clockmatrix.c ptp: ptp_clockmatrix: fix is_single_shot 2022-05-25 21:51:32 -07:00
ptp_clockmatrix.h ptp: ptp_clockmatrix: return -EBUSY if phase pull-in is in progress 2022-05-17 17:49:04 -07:00
ptp_dte.c ptp: convert remaining drivers to adjfine interface 2022-11-11 10:58:39 +00:00
ptp_idt82p33.c ptp: idt82p33: remove PEROUT_ENABLE_OUTPUT_MASK 2022-11-25 10:34:08 +00:00
ptp_idt82p33.h ptp: idt82p33: remove PEROUT_ENABLE_OUTPUT_MASK 2022-11-25 10:34:08 +00:00
ptp_ines.c net_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX 2021-12-14 12:28:24 +00:00
ptp_kvm_arm.c ptp: arm/arm64: Enable ptp_kvm for arm/arm64 2021-04-07 16:33:20 +01:00
ptp_kvm_common.c drivers: convert unsupported .adjfreq to .adjfine 2022-10-31 11:14:16 +00:00
ptp_kvm_x86.c ptp: fix error print of ptp_kvm on X86_64 platform 2021-10-15 11:19:25 +01:00
ptp_ocp.c net: devlink: let the core report the driver name instead of the drivers 2022-11-30 21:49:38 -08:00
ptp_pch.c ptp_phc: convert .adjfreq to .adjfine 2022-11-11 10:58:39 +00:00
ptp_private.h ptp: Speed up vclock lookup 2022-05-10 09:48:09 +02:00
ptp_qoriq_debugfs.c
ptp_qoriq.c ptp_qoriq: fix latency in ptp_qoriq_adjtime() operation 2023-01-20 18:20:38 -08:00
ptp_sysfs.c ptp: Add cycles support for virtual clocks 2022-05-10 09:48:08 +02:00
ptp_vclock.c ptp: Speed up vclock lookup 2022-05-10 09:48:09 +02:00
ptp_vmw.c Networking changes for 6.2. 2022-12-13 15:47:48 -08:00