1 What: /sys/class/timecard/
2 Date: September 2021
3 Contact: Jonathan Lemon <jonathan.lemon@
4 Description: This directory contains files
5 providing a standardized inter
6 features of the OpenCompute ti
7
8 What: /sys/class/timecard/ocpN/
9 Date: September 2021
10 Contact: Jonathan Lemon <jonathan.lemon@
11 Description: This directory contains the at
12 registered.
13
14 What: /sys/class/timecard/ocpN/avail
15 Date: September 2021
16 Contact: Jonathan Lemon <jonathan.lemon@
17 Description: (RO) The list of available tim
18 uses for clock adjustments.
19
20 ==== ========================
21 NONE no adjustments
22 PPS adjustments come from th
23 TOD adjustments from the GNS
24 IRIG adjustments from externa
25 DCF adjustments from externa
26 ==== ========================
27
28 What: /sys/class/timecard/ocpN/avail
29 Date: September 2021
30 Contact: Jonathan Lemon <jonathan.lemon@
31 Description: (RO) Set of available destinat
32 input signal.
33
34 ===== =======================
35 10Mhz signal is used as the 1
36 PPS1 signal is sent to the P
37 PPS2 signal is sent to the P
38 TS1 signal is sent to times
39 TS2 signal is sent to times
40 TS3 signal is sent to times
41 TS4 signal is sent to times
42 IRIG signal is sent to the I
43 DCF signal is sent to the D
44 FREQ1 signal is sent to frequ
45 FREQ2 signal is sent to frequ
46 FREQ3 signal is sent to frequ
47 FREQ4 signal is sent to frequ
48 None signal input is disable
49 ===== =======================
50
51 What: /sys/class/timecard/ocpN/avail
52 Date: May 2021
53 Contact: Jonathan Lemon <jonathan.lemon@
54 Description: (RO) Set of available sources
55
56 ===== =======================
57 10Mhz output is from the 10Mh
58 PHC output PPS is from the
59 MAC output PPS is from the
60 GNSS1 output PPS is from the
61 GNSS2 output PPS is from the
62 IRIG output is from the PHC,
63 DCF output is from the PHC,
64 GEN1 output is from frequenc
65 GEN2 output is from frequenc
66 GEN3 output is from frequenc
67 GEN4 output is from frequenc
68 GND output is GND
69 VCC output is VCC
70 ===== =======================
71
72 What: /sys/class/timecard/ocpN/clock
73 Date: September 2021
74 Contact: Jonathan Lemon <jonathan.lemon@
75 Description: (RW) Contains the current sync
76 the PHC. May be changed by wr
77 values from the available_cloc
78
79 What: /sys/class/timecard/ocpN/clock
80 Date: March 2022
81 Contact: Jonathan Lemon <jonathan.lemon@
82 Description: (RO) Contains the current drif
83 for internal disciplining of t
84
85 What: /sys/class/timecard/ocpN/clock
86 Date: March 2022
87 Contact: Jonathan Lemon <jonathan.lemon@
88 Description: (RO) Contains the current offs
89 for internal disciplining of t
90
91 What: /sys/class/timecard/ocpN/freqX
92 Date: March 2022
93 Contact: Jonathan Lemon <jonathan.lemon@
94 Description: (RO) Optional directory contai
95 frequency counter <X>.
96
97 What: /sys/class/timecard/ocpN/freqX
98 Date: March 2022
99 Contact: Jonathan Lemon <jonathan.lemon@
100 Description: (RO) Contains the measured fre
101 measurement period.
102
103 What: /sys/class/timecard/ocpN/freqX
104 Date: March 2022
105 Contact: Jonathan Lemon <jonathan.lemon@
106 Description: (RW) Specifies the number of s
107 frequency should be measured o
108
109 What: /sys/class/timecard/ocpN/genX
110 Date: March 2022
111 Contact: Jonathan Lemon <jonathan.lemon@
112 Description: (RO) Optional directory contai
113 frequency generator <X>.
114
115 What: /sys/class/timecard/ocpN/genX/
116 Date: March 2022
117 Contact: Jonathan Lemon <jonathan.lemon@
118 Description: (RO) Specifies the signal duty
119
120 What: /sys/class/timecard/ocpN/genX/
121 Date: March 2022
122 Contact: Jonathan Lemon <jonathan.lemon@
123 Description: (RO) Specifies the signal peri
124
125 What: /sys/class/timecard/ocpN/genX/
126 Date: March 2022
127 Contact: Jonathan Lemon <jonathan.lemon@
128 Description: (RO) Specifies the signal phas
129
130 What: /sys/class/timecard/ocpN/genX/
131 Date: March 2022
132 Contact: Jonathan Lemon <jonathan.lemon@
133 Description: (RO) Specifies the signal pola
134
135 What: /sys/class/timecard/ocpN/genX/
136 Date: March 2022
137 Contact: Jonathan Lemon <jonathan.lemon@
138 Description: (RO) Either 0 or 1, showing if
139
140 What: /sys/class/timecard/ocpN/genX/
141 Date: March 2022
142 Contact: Jonathan Lemon <jonathan.lemon@
143 Description: (RO) Shows the time in <sec>.<
144 started running.
145
146 What: /sys/class/timecard/ocpN/genX/
147 Date: March 2022
148 Contact: Jonathan Lemon <jonathan.lemon@
149 Description: (RW) Used to start the signal
150 the current status.
151
152 The signal generator may be st
153 period, followed by the option
154 optional values are not provid
155 settings, which may be obtaine
156
157 period [duty [phase [polar
158
159 echo 500000000 > signal
160 echo 1000000 40 100 > signal
161 echo 0 > signal
162
163 Period and phase are specified
164 a percentage from 1-99. Polar
165
166 Reading this node will return:
167
168 period duty phase polarity
169
170 What: /sys/class/timecard/ocpN/gnss_
171 Date: September 2021
172 Contact: Jonathan Lemon <jonathan.lemon@
173 Description: (RO) Indicates whether a valid
174 or when the signal was lost.
175
176 What: /sys/class/timecard/ocpN/i2c
177 Date: September 2021
178 Contact: Jonathan Lemon <jonathan.lemon@
179 Description: This optional attribute links
180
181 What: /sys/class/timecard/ocpN/irig_
182 Date: September 2021
183 Contact: Jonathan Lemon <jonathan.lemon@
184 Description: (RW) An integer from 0-7 indic
185 of the IRIG-B output signal: B
186
187 What: /sys/class/timecard/ocpN/pps
188 Date: September 2021
189 Contact: Jonathan Lemon <jonathan.lemon@
190 Description: This optional attribute links
191
192 What: /sys/class/timecard/ocpN/ptp
193 Date: September 2021
194 Contact: Jonathan Lemon <jonathan.lemon@
195 Description: This attribute links to the as
196
197 What: /sys/class/timecard/ocpN/seria
198 Date: September 2021
199 Contact: Jonathan Lemon <jonathan.lemon@
200 Description: (RO) Provides the serial numbe
201
202 What: /sys/class/timecard/ocpN/sma1
203 What: /sys/class/timecard/ocpN/sma2
204 What: /sys/class/timecard/ocpN/sma3
205 What: /sys/class/timecard/ocpN/sma4
206 Date: September 2021
207 Contact: Jonathan Lemon <jonathan.lemon@
208 Description: (RW) These attributes specify
209 on the associated SMA connecto
210 or source.
211
212 The display format of the attr
213 list of signals, prefixed by t
214
215 The signal direction may be ch
216 prefixing the signal list with
217 If neither prefix is present,
218
219 The output signal may be chang
220 values from the available_sma_
221
222 The input destinations may be
223 values from the available_sma_
224 separated by spaces. If there
225 destinations between connector
226 connector is given priority.
227
228 Note that not all input combin
229
230 The 10Mhz reference clock inpu
231 on SMA1 and may not be combine
232
233 What: /sys/class/timecard/ocpN/tod_c
234 Date: March 2022
235 Contact: Jonathan Lemon <jonathan.lemon@
236 Description: (RW) The incoming GNSS signal
237 format messages do not provide
238 correction value for the incom
239
240 If UBX_LS is enabled, this sho
241 taken from the UBX-NAV-TIMELS
242
243 What: /sys/class/timecard/ocpN/ts_wi
244 Date: September 2021
245 Contact: Jonathan Lemon <jonathan.lemon@
246 Description: (RW) When retrieving the PHC w
247 ioctl, a system timestamp is m
248 time is retrieved. The midpoi
249 timestamps is usually taken to
250 with the PHC time. This estim
251 on PCI latencies, and when the
252
253 The attribute value reduces th
254 number of nanoseconds, so the
255 retrieved PHC time.
256
257 The initial value is set based
258 the estimated point where the
259 value may be changed by writin
260
261 What: /sys/class/timecard/ocpN/tty
262 Date: August 2024
263 Contact: Vadim Fedorenko <vadim.fedorenk
264 Description: (RO) Directory containing the
265
266 What: /sys/class/timecard/ocpN/tty/t
267 What: /sys/class/timecard/ocpN/tty/t
268 Date: August 2024
269 Contact: Jonathan Lemon <jonathan.lemon@
270 Description: (RO) These optional attributes
271 ports associated with the GNSS
272
273 What: /sys/class/timecard/ocpN/tty/t
274 Date: August 2024
275 Contact: Jonathan Lemon <jonathan.lemon@
276 Description: (RO) This optional attribute c
277 port associated with the Minia
278
279 What: /sys/class/timecard/ocpN/tty/t
280 Date: August 2024
281 Contact: Jonathan Lemon <jonathan.lemon@
282 Description: (RO) This optional attribute c
283 port which outputs the PHC tim
284
285 What: /sys/class/timecard/ocpN/utc_t
286 Date: September 2021
287 Contact: Jonathan Lemon <jonathan.lemon@
288 Description: (RW) The DCF and IRIG output s
289 TimeCard operates on TAI. Thi
290 offset in seconds, which is ad
291 these formats.
292
293 The offset may be changed by w
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