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Dinesh Neelapu 8fda6e80c1 PTP PMC example and system configuartion changes. (r8) 
Updated a small change suggested by ron.

Change-Id: I574cb950642ae6e96c0e888a7d358a7aa9aed944
Signed-off-by: Dinesh Neelapu <dinesh.neelapu@windriver.com>
2023-07-24 14:40:30 +00:00

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Instance Specific Considerations

ptp4l

Default global parameters

  • tx_timestamp_timeout 20
  • summary_interval 6
  • clock_servo linreg
  • network_transport L2
  • time_stamping hardware
  • delay_mechanism E2E
  • boundary_clock_jbod 1
  • uds_address /var/run/ptp4l-<instance name>
  • uds_ro_address /var/run/ptp4l-<instance name>ro

Default interface parameters

NONE

Required user-supplied parameters

domainNumber <number>

Other requirements

An interface with a port must be assigned to the ptp4l instance in order for it to start.

Note

It is recommended to configure one ptp4l instance per . Some designs have a single shared between all the ports on the , while others may have one per port. Refer to the documentation to determine if a has multiple . Configuring a ptp4l instance with multiple interfaces, each with its own results in degraded timing accuracy or other undesirable behaviors. This means that a given ptp4l instance should only be configured with interfaces that are on the same and share a .

phc2sys

Default global parameters

cmdline_opts '-a -r -R 2 -u 600'

Default interface parameters

NONE

Required user-supplied parameters

domainNumber <number>

This should match with the associated ptp4l instance.

uds_address <path>

This value needs to be the same as the uds_address for the ptp4l instance that phc2sys is tracking.

Other requirements

The cmdline_opts are defaulted to support interaction with ptp4l. If phc2sys is instead being used with ts2phc, this parameter will have to be updated. See ptp-instance-examples-517dce312f56 for more information.

Note

The cmdline_opts parameter overrides all default command line flags for the service. This means that when setting cmdline_opts, the full list of desired flags should be set.

ts2phc

Default global parameters

  • ts2phc.pulsewidth 100000000
  • leapfile /usr/share/zoneinfo/leap-seconds.list
  • cmdline_opts '-s nmea'

Default interface parameters

ts2phc.extts_polarity rising

Required user-supplied parameters

This value is the path to the GNSS serial port that is connected, it will be named differently on each system.

ts2phc.nmea_serialport=/dev/ttyGNSS_BBDD_0

Other requirements

An interface with a port must be assigned to the ts2phc instance in order for time to be synced from GNSS to the .

clock

Default global parameters

There are no supported global parameters for clock type.

Default interface parameters

NONE

Required user-supplied parameters

NONE

Other requirements

The clock type instance is a special instance used for configuring the control parameters of the Westport Channel or Logan Beach clock interface parameters.

These parameters can be applied to the interface of a clock instance parameters:

  • sma1 input/output
  • sma2 input/output
  • u.fl1 output
  • u.fl2 input
  • synce_rclka enabled
  • synce_rclkb enabled