1 What: /sys/bus/counter/devices/count 1 What: /sys/bus/counter/devices/counterX/cascade_counts_enable
2 KernelVersion: 6.4 2 KernelVersion: 6.4
3 Contact: linux-iio@vger.kernel.org 3 Contact: linux-iio@vger.kernel.org
4 Description: 4 Description:
5 Indicates the cascading of Cou 5 Indicates the cascading of Counts on Counter X.
6 6
7 Valid attribute values are boo 7 Valid attribute values are boolean.
8 8
9 What: /sys/bus/counter/devices/count 9 What: /sys/bus/counter/devices/counterX/external_input_phase_clock_select
10 KernelVersion: 6.4 10 KernelVersion: 6.4
11 Contact: linux-iio@vger.kernel.org 11 Contact: linux-iio@vger.kernel.org
12 Description: 12 Description:
13 Selects the external clock pin 13 Selects the external clock pin for phase counting mode of
14 Counter X. 14 Counter X.
15 15
16 MTCLKA-MTCLKB: 16 MTCLKA-MTCLKB:
17 MTCLKA and MTCLKB pins 17 MTCLKA and MTCLKB pins are selected for the external
18 phase clock. 18 phase clock.
19 19
20 MTCLKC-MTCLKD: 20 MTCLKC-MTCLKD:
21 MTCLKC and MTCLKD pins 21 MTCLKC and MTCLKD pins are selected for the external
22 phase clock. 22 phase clock.
23 23
24 What: /sys/bus/counter/devices/count 24 What: /sys/bus/counter/devices/counterX/external_input_phase_clock_select_available
25 KernelVersion: 6.4 25 KernelVersion: 6.4
26 Contact: linux-iio@vger.kernel.org 26 Contact: linux-iio@vger.kernel.org
27 Description: 27 Description:
28 Discrete set of available valu 28 Discrete set of available values for the respective device
29 configuration are listed in th 29 configuration are listed in this file.
30 30
31 What: /sys/bus/counter/devices/count 31 What: /sys/bus/counter/devices/counterX/countY/count
32 KernelVersion: 5.2 32 KernelVersion: 5.2
33 Contact: linux-iio@vger.kernel.org 33 Contact: linux-iio@vger.kernel.org
34 Description: 34 Description:
35 Count data of Count Y represen 35 Count data of Count Y represented as a string.
36 36
37 What: /sys/bus/counter/devices/count 37 What: /sys/bus/counter/devices/counterX/countY/capture
38 KernelVersion: 6.1 38 KernelVersion: 6.1
39 Contact: linux-iio@vger.kernel.org 39 Contact: linux-iio@vger.kernel.org
40 Description: 40 Description:
41 Historical capture of the Coun 41 Historical capture of the Count Y count data.
42 42
43 What: /sys/bus/counter/devices/count 43 What: /sys/bus/counter/devices/counterX/countY/ceiling
44 KernelVersion: 5.2 44 KernelVersion: 5.2
45 Contact: linux-iio@vger.kernel.org 45 Contact: linux-iio@vger.kernel.org
46 Description: 46 Description:
47 Count value ceiling for Count 47 Count value ceiling for Count Y. This is the upper limit for the
48 respective counter. 48 respective counter.
49 49
50 What: /sys/bus/counter/devices/count 50 What: /sys/bus/counter/devices/counterX/countY/floor
51 KernelVersion: 5.2 51 KernelVersion: 5.2
52 Contact: linux-iio@vger.kernel.org 52 Contact: linux-iio@vger.kernel.org
53 Description: 53 Description:
54 Count value floor for Count Y. 54 Count value floor for Count Y. This is the lower limit for the
55 respective counter. 55 respective counter.
56 56
57 What: /sys/bus/counter/devices/count 57 What: /sys/bus/counter/devices/counterX/countY/count_mode
58 KernelVersion: 5.2 58 KernelVersion: 5.2
59 Contact: linux-iio@vger.kernel.org 59 Contact: linux-iio@vger.kernel.org
60 Description: 60 Description:
61 Count mode for channel Y. The 61 Count mode for channel Y. The ceiling and floor values for
62 Count Y are used by the count 62 Count Y are used by the count mode where required. The following
63 count modes are available: 63 count modes are available:
64 64
65 normal: 65 normal:
66 Counting is continuous 66 Counting is continuous in either direction.
67 67
68 range limit: 68 range limit:
69 An upper or lower limi 69 An upper or lower limit is set, mimicking limit switches
70 in the mechanical coun 70 in the mechanical counterpart. The upper limit is set to
71 the Count Y ceiling va 71 the Count Y ceiling value, while the lower limit is set
72 to the Count Y floor v 72 to the Count Y floor value. The counter freezes at
73 count = ceiling when c 73 count = ceiling when counting up, and at count = floor
74 when counting down. At 74 when counting down. At either of these limits, the
75 counting is resumed on 75 counting is resumed only when the count direction is
76 reversed. 76 reversed.
77 77
78 non-recycle: 78 non-recycle:
79 The counter is disable 79 The counter is disabled whenever a counter overflow or
80 underflow takes place. 80 underflow takes place. The counter is re-enabled when a
81 new count value is loa 81 new count value is loaded to the counter via a preset
82 operation or direct wr 82 operation or direct write.
83 83
84 modulo-n: 84 modulo-n:
85 A count value boundary 85 A count value boundary is set between the Count Y floor
86 value and the Count Y 86 value and the Count Y ceiling value. The counter is
87 reset to the Count Y f 87 reset to the Count Y floor value at count = ceiling when
88 counting up, while the 88 counting up, while the counter is set to the Count Y
89 ceiling value at count 89 ceiling value at count = floor when counting down; the
90 counter does not freez 90 counter does not freeze at the boundary points, but
91 counts continuously th 91 counts continuously throughout.
92 92
93 interrupt on terminal count: 93 interrupt on terminal count:
94 The output signal is i 94 The output signal is initially low, and will remain low
95 until the counter reac 95 until the counter reaches zero. The output signal then
96 goes high and remains 96 goes high and remains high until a new preset value is
97 set. 97 set.
98 98
99 hardware retriggerable one-sho 99 hardware retriggerable one-shot:
100 The output signal is i 100 The output signal is initially high. The output signal
101 will go low by a trigg 101 will go low by a trigger input signal, and will remain
102 low until the counter 102 low until the counter reaches zero. The output will then
103 go high and remain hig 103 go high and remain high until the next trigger. A
104 trigger results in loa 104 trigger results in loading the counter to the preset
105 value and setting the 105 value and setting the output signal low, thus starting
106 the one-shot pulse. 106 the one-shot pulse.
107 107
108 rate generator: 108 rate generator:
109 The output signal is i 109 The output signal is initially high. When the counter
110 has decremented to 1, 110 has decremented to 1, the output signal goes low for one
111 clock pulse. The outpu 111 clock pulse. The output signal then goes high again, the
112 counter is reloaded to 112 counter is reloaded to the preset value, and the process
113 repeats in a periodic 113 repeats in a periodic manner as such.
114 114
115 square wave mode: 115 square wave mode:
116 The output signal is i 116 The output signal is initially high.
117 117
118 If the initial count i 118 If the initial count is even, the counter is decremented
119 by two on succeeding c 119 by two on succeeding clock pulses. When the count
120 expires, the output si 120 expires, the output signal changes value and the
121 counter is reloaded to 121 counter is reloaded to the preset value. The process
122 repeats in periodic ma 122 repeats in periodic manner as such.
123 123
124 If the initial count i 124 If the initial count is odd, the initial count minus one
125 (an even number) is lo 125 (an even number) is loaded and then is decremented by
126 two on succeeding cloc 126 two on succeeding clock pulses. One clock pulse after
127 the count expires, the 127 the count expires, the output signal goes low and the
128 counter is reloaded to 128 counter is reloaded to the preset value minus one.
129 Succeeding clock pulse 129 Succeeding clock pulses decrement the count by two. When
130 the count expires, the 130 the count expires, the output goes high again and the
131 counter is reloaded to 131 counter is reloaded to the preset value minus one. The
132 process repeats in a p 132 process repeats in a periodic manner as such.
133 133
134 software triggered strobe: 134 software triggered strobe:
135 The output signal is i 135 The output signal is initially high. When the count
136 expires, the output wi 136 expires, the output will go low for one clock pulse and
137 then go high again. Th 137 then go high again. The counting sequence is "triggered"
138 by setting the preset 138 by setting the preset value.
139 139
140 hardware triggered strobe: 140 hardware triggered strobe:
141 The output signal is i 141 The output signal is initially high. Counting is started
142 by a trigger input sig 142 by a trigger input signal. When the count expires, the
143 output signal will go 143 output signal will go low for one clock pulse and then
144 go high again. A trigg 144 go high again. A trigger results in loading the counter
145 to the preset value. 145 to the preset value.
146 146
147 What: /sys/bus/counter/devices/count 147 What: /sys/bus/counter/devices/counterX/countY/count_mode_available
148 What: /sys/bus/counter/devices/count 148 What: /sys/bus/counter/devices/counterX/countY/error_noise_available
149 What: /sys/bus/counter/devices/count 149 What: /sys/bus/counter/devices/counterX/countY/function_available
150 What: /sys/bus/counter/devices/count 150 What: /sys/bus/counter/devices/counterX/countY/prescaler_available
151 What: /sys/bus/counter/devices/count 151 What: /sys/bus/counter/devices/counterX/countY/signalZ_action_available
152 KernelVersion: 5.2 152 KernelVersion: 5.2
153 Contact: linux-iio@vger.kernel.org 153 Contact: linux-iio@vger.kernel.org
154 Description: 154 Description:
155 Discrete set of available valu 155 Discrete set of available values for the respective Count Y
156 configuration are listed in th 156 configuration are listed in this file. Values are delimited by
157 newline characters. 157 newline characters.
158 158
159 What: /sys/bus/counter/devices/count 159 What: /sys/bus/counter/devices/counterX/countY/direction
160 KernelVersion: 5.2 160 KernelVersion: 5.2
161 Contact: linux-iio@vger.kernel.org 161 Contact: linux-iio@vger.kernel.org
162 Description: 162 Description:
163 Read-only attribute that indic 163 Read-only attribute that indicates the count direction of Count
164 Y. Two count directions are av 164 Y. Two count directions are available: forward and backward.
165 165
166 Some counter devices are able 166 Some counter devices are able to determine the direction of
167 their counting. For example, q 167 their counting. For example, quadrature encoding counters can
168 determine the direction of mov 168 determine the direction of movement by evaluating the leading
169 phase of the respective A and 169 phase of the respective A and B quadrature encoding signals.
170 This attribute exposes such co 170 This attribute exposes such count directions.
171 171
172 What: /sys/bus/counter/devices/count 172 What: /sys/bus/counter/devices/counterX/countY/enable
173 KernelVersion: 5.2 173 KernelVersion: 5.2
174 Contact: linux-iio@vger.kernel.org 174 Contact: linux-iio@vger.kernel.org
175 Description: 175 Description:
176 Whether channel Y counter is e 176 Whether channel Y counter is enabled. Valid attribute values are
177 boolean. 177 boolean.
178 178
179 This attribute is intended to 179 This attribute is intended to serve as a pause/unpause mechanism
180 for Count Y. Suppose a counter 180 for Count Y. Suppose a counter device is used to count the total
181 movement of a conveyor belt: t 181 movement of a conveyor belt: this attribute allows an operator
182 to temporarily pause the count 182 to temporarily pause the counter, service the conveyor belt,
183 and then finally unpause the c 183 and then finally unpause the counter to continue where it had
184 left off. 184 left off.
185 185
186 What: /sys/bus/counter/devices/count 186 What: /sys/bus/counter/devices/counterX/countY/error_noise
187 KernelVersion: 5.2 187 KernelVersion: 5.2
188 Contact: linux-iio@vger.kernel.org 188 Contact: linux-iio@vger.kernel.org
189 Description: 189 Description:
190 Read-only attribute that indic 190 Read-only attribute that indicates whether excessive noise is
191 present at the channel Y count 191 present at the channel Y counter inputs.
192 192
193 What: /sys/bus/counter/devices/count 193 What: /sys/bus/counter/devices/counterX/countY/function
194 KernelVersion: 5.2 194 KernelVersion: 5.2
195 Contact: linux-iio@vger.kernel.org 195 Contact: linux-iio@vger.kernel.org
196 Description: 196 Description:
197 Count function mode of Count Y 197 Count function mode of Count Y; count function evaluation is
198 triggered by conditions specif 198 triggered by conditions specified by the Count Y signalZ_action
199 attributes. The following coun 199 attributes. The following count functions are available:
200 200
201 increase: 201 increase:
202 Accumulated count is i 202 Accumulated count is incremented.
203 203
204 decrease: 204 decrease:
205 Accumulated count is d 205 Accumulated count is decremented.
206 206
207 pulse-direction: 207 pulse-direction:
208 Rising edges on signal 208 Rising edges on signal A updates the respective count.
209 The input level of sig 209 The input level of signal B determines direction.
210 210
211 quadrature x1 a: 211 quadrature x1 a:
212 If direction is forwar 212 If direction is forward, rising edges on quadrature pair
213 signal A updates the r 213 signal A updates the respective count; if the direction
214 is backward, falling e 214 is backward, falling edges on quadrature pair signal A
215 updates the respective 215 updates the respective count. Quadrature encoding
216 determines the directi 216 determines the direction.
217 217
218 quadrature x1 b: 218 quadrature x1 b:
219 If direction is forwar 219 If direction is forward, rising edges on quadrature pair
220 signal B updates the r 220 signal B updates the respective count; if the direction
221 is backward, falling e 221 is backward, falling edges on quadrature pair signal B
222 updates the respective 222 updates the respective count. Quadrature encoding
223 determines the directi 223 determines the direction.
224 224
225 quadrature x2 a: 225 quadrature x2 a:
226 Any state transition o 226 Any state transition on quadrature pair signal A updates
227 the respective count. 227 the respective count. Quadrature encoding determines the
228 direction. 228 direction.
229 229
230 quadrature x2 b: 230 quadrature x2 b:
231 Any state transition o 231 Any state transition on quadrature pair signal B updates
232 the respective count. 232 the respective count. Quadrature encoding determines the
233 direction. 233 direction.
234 234
235 quadrature x4: 235 quadrature x4:
236 Any state transition o 236 Any state transition on either quadrature pair signals
237 updates the respective 237 updates the respective count. Quadrature encoding
238 determines the directi 238 determines the direction.
239 239
240 What: /sys/bus/counter/devices/count 240 What: /sys/bus/counter/devices/counterX/countY/name
241 KernelVersion: 5.2 241 KernelVersion: 5.2
242 Contact: linux-iio@vger.kernel.org 242 Contact: linux-iio@vger.kernel.org
243 Description: 243 Description:
244 Read-only attribute that indic 244 Read-only attribute that indicates the device-specific name of
245 Count Y. If possible, this sho 245 Count Y. If possible, this should match the name of the
246 respective channel as it appea 246 respective channel as it appears in the device datasheet.
247 247
248 What: /sys/bus/counter/devices/count 248 What: /sys/bus/counter/devices/counterX/countY/prescaler
249 KernelVersion: 5.2 249 KernelVersion: 5.2
250 Contact: linux-iio@vger.kernel.org 250 Contact: linux-iio@vger.kernel.org
251 Description: 251 Description:
252 Configure the prescaler value 252 Configure the prescaler value associated with Count Y.
253 On the FlexTimer, the counter 253 On the FlexTimer, the counter clock source passes through a
254 prescaler (i.e. a counter). Th 254 prescaler (i.e. a counter). This acts like a clock
255 divider. 255 divider.
256 256
257 What: /sys/bus/counter/devices/count 257 What: /sys/bus/counter/devices/counterX/countY/preset
258 KernelVersion: 5.2 258 KernelVersion: 5.2
259 Contact: linux-iio@vger.kernel.org 259 Contact: linux-iio@vger.kernel.org
260 Description: 260 Description:
261 If the counter device supports 261 If the counter device supports preset registers -- registers
262 used to load counter channels 262 used to load counter channels to a set count upon device-defined
263 preset operation trigger event 263 preset operation trigger events -- the preset count for channel
264 Y is provided by this attribut 264 Y is provided by this attribute.
265 265
266 What: /sys/bus/counter/devices/count 266 What: /sys/bus/counter/devices/counterX/countY/preset_enable
267 KernelVersion: 5.2 267 KernelVersion: 5.2
268 Contact: linux-iio@vger.kernel.org 268 Contact: linux-iio@vger.kernel.org
269 Description: 269 Description:
270 Whether channel Y counter pres 270 Whether channel Y counter preset operation is enabled. Valid
271 attribute values are boolean. 271 attribute values are boolean.
272 272
273 What: /sys/bus/counter/devices/count 273 What: /sys/bus/counter/devices/counterX/countY/signalZ_action
274 KernelVersion: 5.2 274 KernelVersion: 5.2
275 Contact: linux-iio@vger.kernel.org 275 Contact: linux-iio@vger.kernel.org
276 Description: 276 Description:
277 Action mode of Count Y for Sig 277 Action mode of Count Y for Signal Z. This attribute indicates
278 the condition of Signal Z that 278 the condition of Signal Z that triggers the count function
279 evaluation for Count Y. The fo 279 evaluation for Count Y. The following action modes are
280 available: 280 available:
281 281
282 none: 282 none:
283 Signal does not trigge 283 Signal does not trigger the count function. In
284 Pulse-Direction count 284 Pulse-Direction count function mode, this Signal is
285 evaluated as Direction 285 evaluated as Direction.
286 286
287 rising edge: 287 rising edge:
288 Low state transitions 288 Low state transitions to high state.
289 289
290 falling edge: 290 falling edge:
291 High state transitions 291 High state transitions to low state.
292 292
293 both edges: 293 both edges:
294 Any state transition. 294 Any state transition.
295 295
296 What: /sys/bus/counter/devices/count 296 What: /sys/bus/counter/devices/counterX/countY/num_overflows
297 KernelVersion: 6.1 297 KernelVersion: 6.1
298 Contact: linux-iio@vger.kernel.org 298 Contact: linux-iio@vger.kernel.org
299 Description: 299 Description:
300 This attribute indicates the n 300 This attribute indicates the number of overflows of count Y.
301 301
302 What: /sys/bus/counter/devices/count 302 What: /sys/bus/counter/devices/counterX/cascade_counts_enable_component_id
303 What: /sys/bus/counter/devices/count 303 What: /sys/bus/counter/devices/counterX/external_input_phase_clock_select_component_id
304 What: /sys/bus/counter/devices/count 304 What: /sys/bus/counter/devices/counterX/countY/capture_component_id
305 What: /sys/bus/counter/devices/count 305 What: /sys/bus/counter/devices/counterX/countY/ceiling_component_id
306 What: /sys/bus/counter/devices/count 306 What: /sys/bus/counter/devices/counterX/countY/floor_component_id
307 What: /sys/bus/counter/devices/count 307 What: /sys/bus/counter/devices/counterX/countY/count_mode_component_id
308 What: /sys/bus/counter/devices/count 308 What: /sys/bus/counter/devices/counterX/countY/direction_component_id
309 What: /sys/bus/counter/devices/count 309 What: /sys/bus/counter/devices/counterX/countY/enable_component_id
310 What: /sys/bus/counter/devices/count 310 What: /sys/bus/counter/devices/counterX/countY/error_noise_component_id
311 What: /sys/bus/counter/devices/count 311 What: /sys/bus/counter/devices/counterX/countY/prescaler_component_id
312 What: /sys/bus/counter/devices/count 312 What: /sys/bus/counter/devices/counterX/countY/preset_component_id
313 What: /sys/bus/counter/devices/count 313 What: /sys/bus/counter/devices/counterX/countY/preset_enable_component_id
314 What: /sys/bus/counter/devices/count 314 What: /sys/bus/counter/devices/counterX/countY/signalZ_action_component_id
315 What: /sys/bus/counter/devices/count 315 What: /sys/bus/counter/devices/counterX/countY/num_overflows_component_id
316 What: /sys/bus/counter/devices/count 316 What: /sys/bus/counter/devices/counterX/signalY/cable_fault_component_id
317 What: /sys/bus/counter/devices/count 317 What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id
318 What: /sys/bus/counter/devices/count 318 What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id
319 What: /sys/bus/counter/devices/count 319 What: /sys/bus/counter/devices/counterX/signalY/index_polarity_component_id
320 What: /sys/bus/counter/devices/count 320 What: /sys/bus/counter/devices/counterX/signalY/polarity_component_id
321 What: /sys/bus/counter/devices/count 321 What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_component_id
322 What: /sys/bus/counter/devices/count 322 What: /sys/bus/counter/devices/counterX/signalY/frequency_component_id
323 KernelVersion: 5.16 323 KernelVersion: 5.16
324 Contact: linux-iio@vger.kernel.org 324 Contact: linux-iio@vger.kernel.org
325 Description: 325 Description:
326 Read-only attribute that indic 326 Read-only attribute that indicates the component ID of the
327 respective extension or Synaps 327 respective extension or Synapse.
328 328
329 What: /sys/bus/counter/devices/count 329 What: /sys/bus/counter/devices/counterX/countY/spike_filter_ns
330 KernelVersion: 5.14 330 KernelVersion: 5.14
331 Contact: linux-iio@vger.kernel.org 331 Contact: linux-iio@vger.kernel.org
332 Description: 332 Description:
333 If the counter device supports 333 If the counter device supports programmable spike filter this
334 attribute indicates the value 334 attribute indicates the value in nanoseconds where noise pulses
335 shorter or equal to configured 335 shorter or equal to configured value are ignored. Value 0 means
336 filter is disabled. 336 filter is disabled.
337 337
338 What: /sys/bus/counter/devices/count 338 What: /sys/bus/counter/devices/counterX/events_queue_size
339 KernelVersion: 5.16 339 KernelVersion: 5.16
340 Contact: linux-iio@vger.kernel.org 340 Contact: linux-iio@vger.kernel.org
341 Description: 341 Description:
342 Size of the Counter events que 342 Size of the Counter events queue in number of struct
343 counter_event data structures. 343 counter_event data structures. The number of elements will be
344 rounded-up to a power of 2. 344 rounded-up to a power of 2.
345 345
346 What: /sys/bus/counter/devices/count 346 What: /sys/bus/counter/devices/counterX/name
347 KernelVersion: 5.2 347 KernelVersion: 5.2
348 Contact: linux-iio@vger.kernel.org 348 Contact: linux-iio@vger.kernel.org
349 Description: 349 Description:
350 Read-only attribute that indic 350 Read-only attribute that indicates the device-specific name of
351 the Counter. This should match 351 the Counter. This should match the name of the device as it
352 appears in its respective data 352 appears in its respective datasheet.
353 353
354 What: /sys/bus/counter/devices/count 354 What: /sys/bus/counter/devices/counterX/num_counts
355 KernelVersion: 5.2 355 KernelVersion: 5.2
356 Contact: linux-iio@vger.kernel.org 356 Contact: linux-iio@vger.kernel.org
357 Description: 357 Description:
358 Read-only attribute that indic 358 Read-only attribute that indicates the total number of Counts
359 belonging to the Counter. 359 belonging to the Counter.
360 360
361 What: /sys/bus/counter/devices/count 361 What: /sys/bus/counter/devices/counterX/num_signals
362 KernelVersion: 5.2 362 KernelVersion: 5.2
363 Contact: linux-iio@vger.kernel.org 363 Contact: linux-iio@vger.kernel.org
364 Description: 364 Description:
365 Read-only attribute that indic 365 Read-only attribute that indicates the total number of Signals
366 belonging to the Counter. 366 belonging to the Counter.
367 367
368 What: /sys/bus/counter/devices/count 368 What: /sys/bus/counter/devices/counterX/signalY/cable_fault
369 KernelVersion: 5.7 369 KernelVersion: 5.7
370 Contact: linux-iio@vger.kernel.org 370 Contact: linux-iio@vger.kernel.org
371 Description: 371 Description:
372 Read-only attribute that indic 372 Read-only attribute that indicates whether a differential
373 encoder cable fault (not conne 373 encoder cable fault (not connected or loose wires) is detected
374 for the respective channel of 374 for the respective channel of Signal Y. Valid attribute values
375 are boolean. Detection must fi 375 are boolean. Detection must first be enabled via the
376 corresponding cable_fault_enab 376 corresponding cable_fault_enable attribute.
377 377
378 What: /sys/bus/counter/devices/count 378 What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable
379 KernelVersion: 5.7 379 KernelVersion: 5.7
380 Contact: linux-iio@vger.kernel.org 380 Contact: linux-iio@vger.kernel.org
381 Description: 381 Description:
382 Whether detection of different 382 Whether detection of differential encoder cable faults for the
383 respective channel of Signal Y 383 respective channel of Signal Y is enabled. Valid attribute
384 values are boolean. 384 values are boolean.
385 385
386 What: /sys/bus/counter/devices/count 386 What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler
387 KernelVersion: 5.7 387 KernelVersion: 5.7
388 Contact: linux-iio@vger.kernel.org 388 Contact: linux-iio@vger.kernel.org
389 Description: 389 Description:
390 Filter clock factor for input 390 Filter clock factor for input Signal Y. This prescaler value
391 affects the inputs of both qua 391 affects the inputs of both quadrature pair signals.
392 392
393 What: /sys/bus/counter/devices/count 393 What: /sys/bus/counter/devices/counterX/signalY/index_polarity
394 KernelVersion: 5.2 394 KernelVersion: 5.2
395 Contact: linux-iio@vger.kernel.org 395 Contact: linux-iio@vger.kernel.org
396 Description: 396 Description:
397 Active level of index input Si 397 Active level of index input Signal Y; irrelevant in
398 non-synchronous load mode. 398 non-synchronous load mode.
399 399
400 What: /sys/bus/counter/devices/count 400 What: /sys/bus/counter/devices/counterX/signalY/index_polarity_available
401 What: /sys/bus/counter/devices/count 401 What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available
402 KernelVersion: 5.2 402 KernelVersion: 5.2
403 Contact: linux-iio@vger.kernel.org 403 Contact: linux-iio@vger.kernel.org
404 Description: 404 Description:
405 Discrete set of available valu 405 Discrete set of available values for the respective Signal Y
406 configuration are listed in th 406 configuration are listed in this file.
407 407
408 What: /sys/bus/counter/devices/count 408 What: /sys/bus/counter/devices/counterX/signalY/polarity
409 KernelVersion: 6.1 409 KernelVersion: 6.1
410 Contact: linux-iio@vger.kernel.org 410 Contact: linux-iio@vger.kernel.org
411 Description: 411 Description:
412 Active level of Signal Y. The 412 Active level of Signal Y. The following polarity values are
413 available: 413 available:
414 414
415 positive: 415 positive:
416 Signal high state cons 416 Signal high state considered active level (rising edge).
417 417
418 negative: 418 negative:
419 Signal low state consi 419 Signal low state considered active level (falling edge).
420 420
421 What: /sys/bus/counter/devices/count 421 What: /sys/bus/counter/devices/counterX/signalY/name
422 KernelVersion: 5.2 422 KernelVersion: 5.2
423 Contact: linux-iio@vger.kernel.org 423 Contact: linux-iio@vger.kernel.org
424 Description: 424 Description:
425 Read-only attribute that indic 425 Read-only attribute that indicates the device-specific name of
426 Signal Y. If possible, this sh 426 Signal Y. If possible, this should match the name of the
427 respective signal as it appear 427 respective signal as it appears in the device datasheet.
428 428
429 What: /sys/bus/counter/devices/count 429 What: /sys/bus/counter/devices/counterX/signalY/signal
430 KernelVersion: 5.2 430 KernelVersion: 5.2
431 Contact: linux-iio@vger.kernel.org 431 Contact: linux-iio@vger.kernel.org
432 Description: 432 Description:
433 Signal level state of Signal Y 433 Signal level state of Signal Y. The following signal level
434 states are available: 434 states are available:
435 435
436 low: 436 low:
437 Low level state. 437 Low level state.
438 438
439 high: 439 high:
440 High level state. 440 High level state.
441 441
442 What: /sys/bus/counter/devices/count 442 What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode
443 KernelVersion: 5.2 443 KernelVersion: 5.2
444 Contact: linux-iio@vger.kernel.org 444 Contact: linux-iio@vger.kernel.org
445 Description: 445 Description:
446 Configure the counter associat 446 Configure the counter associated with Signal Y for
447 non-synchronous or synchronous 447 non-synchronous or synchronous load mode. Synchronous load mode
448 cannot be selected in non-quad 448 cannot be selected in non-quadrature (Pulse-Direction) clock
449 mode. 449 mode.
450 450
451 non-synchronous: 451 non-synchronous:
452 A logic low level is t 452 A logic low level is the active level at this index
453 input. The index funct 453 input. The index function (as enabled via preset_enable)
454 is performed directly 454 is performed directly on the active level of the index
455 input. 455 input.
456 456
457 synchronous: 457 synchronous:
458 Intended for interfaci 458 Intended for interfacing with encoder Index output in
459 quadrature clock mode. 459 quadrature clock mode. The active level is configured
460 via index_polarity. Th 460 via index_polarity. The index function (as enabled via
461 preset_enable) is perf 461 preset_enable) is performed synchronously with the
462 quadrature clock on th 462 quadrature clock on the active level of the index input.
463 463
464 What: /sys/bus/counter/devices/count 464 What: /sys/bus/counter/devices/counterX/signalY/frequency
465 KernelVersion: 6.1 465 KernelVersion: 6.1
466 Contact: linux-iio@vger.kernel.org 466 Contact: linux-iio@vger.kernel.org
467 Description: 467 Description:
468 Read-only attribute that indic 468 Read-only attribute that indicates the signal Y frequency, in Hz.
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