mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 23:01:04 +07:00
d83e2a4ea2
s/avaiable/available/g This fixup is already in scripts/spelling.txt. The fix in Documentation/ABI/testing/sysfs-ptp affects documentation of a /sys entry: the /sys entry itself is correct. Signed-off-by: Chris Dunlop <chris@onthe.net.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
123 lines
4.2 KiB
Plaintext
123 lines
4.2 KiB
Plaintext
What: /sys/class/ptp/
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This directory contains files and directories
|
|
providing a standardized interface to the ancillary
|
|
features of PTP hardware clocks.
|
|
|
|
What: /sys/class/ptp/ptpN/
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This directory contains the attributes of the Nth PTP
|
|
hardware clock registered into the PTP class driver
|
|
subsystem.
|
|
|
|
What: /sys/class/ptp/ptpN/clock_name
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the name of the PTP hardware clock
|
|
as a human readable string. The purpose of this
|
|
attribute is to provide the user with a "friendly
|
|
name" and to help distinguish PHY based devices from
|
|
MAC based ones. The string does not necessarily have
|
|
to be any kind of unique id.
|
|
|
|
What: /sys/class/ptp/ptpN/max_adjustment
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the PTP hardware clock's maximum
|
|
frequency adjustment value (a positive integer) in
|
|
parts per billion.
|
|
|
|
What: /sys/class/ptp/ptpN/n_alarms
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the number of periodic or one shot
|
|
alarms offer by the PTP hardware clock.
|
|
|
|
What: /sys/class/ptp/ptpN/n_external_timestamps
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the number of external timestamp
|
|
channels offered by the PTP hardware clock.
|
|
|
|
What: /sys/class/ptp/ptpN/n_periodic_outputs
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the number of programmable periodic
|
|
output channels offered by the PTP hardware clock.
|
|
|
|
What: /sys/class/ptp/ptpN/n_pins
|
|
Date: March 2014
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file contains the number of programmable pins
|
|
offered by the PTP hardware clock.
|
|
|
|
What: /sys/class/ptp/ptpN/pins
|
|
Date: March 2014
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This directory contains one file for each programmable
|
|
pin offered by the PTP hardware clock. The file name
|
|
is the hardware dependent pin name. Reading from this
|
|
file produces two numbers, the assigned function (see
|
|
the PTP_PF_ enumeration values in linux/ptp_clock.h)
|
|
and the channel number. The function and channel
|
|
assignment may be changed by two writing numbers into
|
|
the file.
|
|
|
|
What: /sys/class/ptp/ptpN/pps_available
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file indicates whether the PTP hardware clock
|
|
supports a Pulse Per Second to the host CPU. Reading
|
|
"1" means that the PPS is supported, while "0" means
|
|
not supported.
|
|
|
|
What: /sys/class/ptp/ptpN/extts_enable
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This write-only file enables or disables external
|
|
timestamps. To enable external timestamps, write the
|
|
channel index followed by a "1" into the file.
|
|
To disable external timestamps, write the channel
|
|
index followed by a "0" into the file.
|
|
|
|
What: /sys/class/ptp/ptpN/fifo
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This file provides timestamps on external events, in
|
|
the form of three integers: channel index, seconds,
|
|
and nanoseconds.
|
|
|
|
What: /sys/class/ptp/ptpN/period
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This write-only file enables or disables periodic
|
|
outputs. To enable a periodic output, write five
|
|
integers into the file: channel index, start time
|
|
seconds, start time nanoseconds, period seconds, and
|
|
period nanoseconds. To disable a periodic output, set
|
|
all the seconds and nanoseconds values to zero.
|
|
|
|
What: /sys/class/ptp/ptpN/pps_enable
|
|
Date: September 2010
|
|
Contact: Richard Cochran <richardcochran@gmail.com>
|
|
Description:
|
|
This write-only file enables or disables delivery of
|
|
PPS events to the Linux PPS subsystem. To enable PPS
|
|
events, write a "1" into the file. To disable events,
|
|
write a "0" into the file.
|