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