mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
4.2 KiB
122 lines
4.2 KiB
What: /sys/class/ptp/ |
|
Date: September 2010 |
|
Contact: Richard Cochran <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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 <[email protected]> |
|
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.
|
|
|