diff options
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-timecard | 94 |
1 files changed, 93 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-timecard b/Documentation/ABI/testing/sysfs-timecard index 5bf78486a469..220478156297 100644 --- a/Documentation/ABI/testing/sysfs-timecard +++ b/Documentation/ABI/testing/sysfs-timecard @@ -37,8 +37,15 @@ Description: (RO) Set of available destinations (sinks) for a SMA PPS2 signal is sent to the PPS2 selector TS1 signal is sent to timestamper 1 TS2 signal is sent to timestamper 2 + TS3 signal is sent to timestamper 3 + TS4 signal is sent to timestamper 4 IRIG signal is sent to the IRIG-B module DCF signal is sent to the DCF module + FREQ1 signal is sent to frequency counter 1 + FREQ2 signal is sent to frequency counter 2 + FREQ3 signal is sent to frequency counter 3 + FREQ4 signal is sent to frequency counter 4 + None signal input is disabled ===== ================================================ What: /sys/class/timecard/ocpN/available_sma_outputs @@ -50,10 +57,16 @@ Description: (RO) Set of available sources for a SMA output signal. 10Mhz output is from the 10Mhz reference clock PHC output PPS is from the PHC clock MAC output PPS is from the Miniature Atomic Clock - GNSS output PPS is from the GNSS module + GNSS1 output PPS is from the first GNSS module GNSS2 output PPS is from the second GNSS module IRIG output is from the PHC, in IRIG-B format DCF output is from the PHC, in DCF format + GEN1 output is from frequency generator 1 + GEN2 output is from frequency generator 2 + GEN3 output is from frequency generator 3 + GEN4 output is from frequency generator 4 + GND output is GND + VCC output is VCC ===== ================================================ What: /sys/class/timecard/ocpN/clock_source @@ -75,6 +88,85 @@ Contact: Jonathan Lemon <jonathan.lemon@gmail.com> Description: (RO) Contains the current offset value used by the firmware for internal disciplining of the atomic clock. +What: /sys/class/timecard/ocpN/freqX +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Optional directory containing the sysfs nodes for + frequency counter <X>. + +What: /sys/class/timecard/ocpN/freqX/frequency +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Contains the measured frequency over the specified + measurement period. + +What: /sys/class/timecard/ocpN/freqX/seconds +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RW) Specifies the number of seconds from 0-255 that the + frequency should be measured over. Write 0 to disable. + +What: /sys/class/timecard/ocpN/genX +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Optional directory containing the sysfs nodes for + frequency generator <X>. + +What: /sys/class/timecard/ocpN/genX/duty +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Specifies the signal duty cycle as a percentage from 1-99. + +What: /sys/class/timecard/ocpN/genX/period +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Specifies the signal period in nanoseconds. + +What: /sys/class/timecard/ocpN/genX/phase +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Specifies the signal phase offset in nanoseconds. + +What: /sys/class/timecard/ocpN/genX/polarity +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Specifies the signal polarity, either 1 or 0. + +What: /sys/class/timecard/ocpN/genX/running +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Either 0 or 1, showing if the signal generator is running. + +What: /sys/class/timecard/ocpN/genX/start +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RO) Shows the time in <sec>.<nsec> that the signal generator + started running. + +What: /sys/class/timecard/ocpN/genX/signal +Date: March 2022 +Contact: Jonathan Lemon <jonathan.lemon@gmail.com> +Description: (RW) Used to start the signal generator, and summarize + the current status. + + The signal generator may be started by writing the signal + period, followed by the optional signal values. If the + optional values are not provided, they default to the current + settings, which may be obtained from the other sysfs nodes. + + period [duty [phase [polarity]]] + + echo 500000000 > signal # 1/2 second period + echo 1000000 40 100 > signal + echo 0 > signal # turn off generator + + Period and phase are specified in nanoseconds. Duty cycle is + a percentage from 1-99. Polarity is 1 or 0. + + Reading this node will return: + + period duty phase polarity start_time + What: /sys/class/timecard/ocpN/gnss_sync Date: September 2021 Contact: Jonathan Lemon <jonathan.lemon@gmail.com> |