diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-ptp')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-ptp | 62 |
1 files changed, 51 insertions, 11 deletions
diff --git a/Documentation/ABI/testing/sysfs-ptp b/Documentation/ABI/testing/sysfs-ptp index 05aeedf17794..9c317ac7c47a 100644 --- a/Documentation/ABI/testing/sysfs-ptp +++ b/Documentation/ABI/testing/sysfs-ptp @@ -6,7 +6,7 @@ Description: providing a standardized interface to the ancillary features of PTP hardware clocks. -What: /sys/class/ptp/ptpN/ +What: /sys/class/ptp/ptp<N>/ Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -14,7 +14,7 @@ Description: hardware clock registered into the PTP class driver subsystem. -What: /sys/class/ptp/ptpN/clock_name +What: /sys/class/ptp/ptp<N>/clock_name Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -25,7 +25,7 @@ Description: MAC based ones. The string does not necessarily have to be any kind of unique id. -What: /sys/class/ptp/ptpN/max_adjustment +What: /sys/class/ptp/ptp<N>/max_adjustment Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -33,28 +33,68 @@ Description: frequency adjustment value (a positive integer) in parts per billion. -What: /sys/class/ptp/ptpN/n_alarms +What: /sys/class/ptp/ptp<N>/max_vclocks +Date: May 2021 +Contact: Yangbo Lu <yangbo.lu@nxp.com> +Description: + This file contains the maximum number of ptp vclocks. + Write integer to re-configure it. + +What: /sys/class/ptp/ptp<N>/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 +What: /sys/class/ptp/ptp<N>/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 +What: /sys/class/ptp/ptp<N>/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/pps_avaiable +What: /sys/class/ptp/ptp<N>/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/ptp<N>/n_vclocks +Date: May 2021 +Contact: Yangbo Lu <yangbo.lu@nxp.com> +Description: + This file contains the number of virtual PTP clocks in + use. By default, the value is 0 meaning that only the + physical clock is in use. Setting the value creates + the corresponding number of virtual clocks and causes + the physical clock to become free running. Setting the + value back to 0 deletes the virtual clocks and + switches the physical clock back to normal, adjustable + operation. + +What: /sys/class/ptp/ptp<N>/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/ptp<N>/pps_available Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -63,7 +103,7 @@ Description: "1" means that the PPS is supported, while "0" means not supported. -What: /sys/class/ptp/ptpN/extts_enable +What: /sys/class/ptp/ptp<N>/extts_enable Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -73,7 +113,7 @@ Description: To disable external timestamps, write the channel index followed by a "0" into the file. -What: /sys/class/ptp/ptpN/fifo +What: /sys/class/ptp/ptp<N>/fifo Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -81,7 +121,7 @@ Description: the form of three integers: channel index, seconds, and nanoseconds. -What: /sys/class/ptp/ptpN/period +What: /sys/class/ptp/ptp<N>/period Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: @@ -92,7 +132,7 @@ Description: period nanoseconds. To disable a periodic output, set all the seconds and nanoseconds values to zero. -What: /sys/class/ptp/ptpN/pps_enable +What: /sys/class/ptp/ptp<N>/pps_enable Date: September 2010 Contact: Richard Cochran <richardcochran@gmail.com> Description: |