1 What: /sys/bus/iio/devices/iio:deviceX
3 Contact: linux-iio@vger.kernel.org
5 Hardware chip or device accessed by one communication port.
6 Corresponds to a grouping of sensor channels. X is the IIO
9 What: /sys/bus/iio/devices/triggerX
11 Contact: linux-iio@vger.kernel.org
13 An event driven driver of data capture to an in kernel buffer.
14 May be provided by a device driver that also has an IIO device
15 based on hardware generated events (e.g. data ready) or
16 provided by a separate driver for other hardware (e.g.
17 periodic timer, GPIO or high resolution timer).
18 Contains trigger type specific elements. These do not
19 generalize well and hence are not documented in this file.
20 X is the IIO index of the trigger.
22 What: /sys/bus/iio/devices/iio:deviceX/buffer
24 Contact: linux-iio@vger.kernel.org
26 Directory of attributes relating to the buffer for the device.
28 What: /sys/bus/iio/devices/iio:deviceX/name
30 Contact: linux-iio@vger.kernel.org
32 Description of the physical chip / device for device X.
33 Typically a part number.
35 What: /sys/bus/iio/devices/iio:deviceX/current_timestamp_clock
37 Contact: linux-iio@vger.kernel.org
39 String identifying current posix clock used to timestamp
40 buffered samples and events for device X.
42 What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency
43 What: /sys/bus/iio/devices/iio:deviceX/buffer/sampling_frequency
44 What: /sys/bus/iio/devices/triggerX/sampling_frequency
46 Contact: linux-iio@vger.kernel.org
48 Some devices have internal clocks. This parameter sets the
49 resulting sampling frequency. In many devices this
50 parameter has an effect on input filters etc. rather than
51 simply controlling when the input is sampled. As this
52 effects data ready triggers, hardware buffers and the sysfs
53 direct access interfaces, it may be found in any of the
54 relevant directories. If it effects all of the above
55 then it is to be found in the base device directory.
57 What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available
58 What: /sys/bus/iio/devices/iio:deviceX/in_proximity_sampling_frequency_available
59 What: /sys/.../iio:deviceX/buffer/sampling_frequency_available
60 What: /sys/bus/iio/devices/triggerX/sampling_frequency_available
62 Contact: linux-iio@vger.kernel.org
64 When the internal sampling clock can only take a small
65 discrete set of values, this file lists those available.
67 What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio
69 Contact: linux-iio@vger.kernel.org
71 Hardware dependent ADC oversampling. Controls the sampling ratio
72 of the digital filter if available.
74 What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio_available
76 Contact: linux-iio@vger.kernel.org
78 Hardware dependent values supported by the oversampling filter.
80 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
81 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
82 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw
83 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw
85 Contact: linux-iio@vger.kernel.org
87 Raw (unscaled no bias removal etc.) voltage measurement from
88 channel Y. In special cases where the channel does not
89 correspond to externally available input one of the named
90 versions may be used. The number must always be specified and
91 unique to allow association with event codes. Units after
92 application of scale and offset are millivolts.
94 Channels with 'i' and 'q' modifiers always exist in pairs and both
95 channels refer to the same signal. The 'i' channel contains the in-phase
96 component of the signal while the 'q' channel contains the quadrature
99 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
100 KernelVersion: 2.6.35
101 Contact: linux-iio@vger.kernel.org
103 Raw (unscaled) differential voltage measurement equivalent to
104 channel Y - channel Z where these channel numbers apply to the
105 physically equivalent inputs when non differential readings are
106 separately available. In differential only parts, then all that
107 is required is a consistent labeling. Units after application
108 of scale and offset are millivolts.
110 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_raw
111 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_raw
113 Contact: linux-iio@vger.kernel.org
115 Raw (unscaled no bias removal etc.) current measurement from
116 channel Y. In special cases where the channel does not
117 correspond to externally available input one of the named
118 versions may be used. The number must always be specified and
119 unique to allow association with event codes. Units after
120 application of scale and offset are milliamps.
122 What: /sys/bus/iio/devices/iio:deviceX/in_powerY_raw
124 Contact: linux-iio@vger.kernel.org
126 Raw (unscaled no bias removal etc.) power measurement from
127 channel Y. The number must always be specified and
128 unique to allow association with event codes. Units after
129 application of scale and offset are milliwatts.
131 What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
133 Contact: linux-iio@vger.kernel.org
135 Raw capacitance measurement from channel Y. Units after
136 application of scale and offset are nanofarads.
138 What: /sys/.../iio:deviceX/in_capacitanceY-in_capacitanceZ_raw
140 Contact: linux-iio@vger.kernel.org
142 Raw differential capacitance measurement equivalent to
143 channel Y - channel Z where these channel numbers apply to the
144 physically equivalent inputs when non differential readings are
145 separately available. In differential only parts, then all that
146 is required is a consistent labeling. Units after application
147 of scale and offset are nanofarads.
149 What: /sys/bus/iio/devices/iio:deviceX/in_temp_raw
150 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_raw
151 What: /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw
152 What: /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw
153 What: /sys/bus/iio/devices/iio:deviceX/in_temp_ambient_raw
154 What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_raw
155 KernelVersion: 2.6.35
156 Contact: linux-iio@vger.kernel.org
158 Raw (unscaled no bias removal etc.) temperature measurement.
159 If an axis is specified it generally means that the temperature
160 sensor is associated with one part of a compound device (e.g.
161 a gyroscope axis). The ambient and object modifiers distinguish
162 between ambient (reference) and distant temperature for contact-
163 less measurements. Units after application of scale and offset
164 are milli degrees Celsius.
166 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_input
167 KernelVersion: 2.6.38
168 Contact: linux-iio@vger.kernel.org
170 Scaled temperature measurement in milli degrees Celsius.
172 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw
173 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw
174 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw
175 KernelVersion: 2.6.35
176 Contact: linux-iio@vger.kernel.org
178 Acceleration in direction x, y or z (may be arbitrarily assigned
179 but should match other such assignments on device).
180 Has all of the equivalent parameters as per voltageY. Units
181 after application of scale and offset are m/s^2.
183 What: /sys/bus/iio/devices/iio:deviceX/in_gravity_x_raw
184 What: /sys/bus/iio/devices/iio:deviceX/in_gravity_y_raw
185 What: /sys/bus/iio/devices/iio:deviceX/in_gravity_z_raw
187 Contact: linux-iio@vger.kernel.org
189 Gravity in direction x, y or z (may be arbitrarily assigned
190 but should match other such assignments on device).
191 Units after application of scale and offset are m/s^2.
193 What: /sys/bus/iio/devices/iio:deviceX/in_angl_raw
195 Contact: linux-iio@vger.kernel.org
197 Angle of rotation. Units after application of scale and offset
200 What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_x_raw
201 What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_y_raw
203 Contact: linux-iio@vger.kernel.org
205 Relative position in direction x or y on a pad (may be
206 arbitrarily assigned but should match other such assignments on
208 Units after application of scale and offset are milli percents
209 from the pad's size in both directions. Should be calibrated by
212 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw
213 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
214 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
215 KernelVersion: 2.6.35
216 Contact: linux-iio@vger.kernel.org
218 Angular velocity about axis x, y or z (may be arbitrarily
219 assigned). Has all the equivalent parameters as per voltageY.
220 Units after application of scale and offset are radians per
223 What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw
224 What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw
225 What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw
226 KernelVersion: 2.6.35
227 Contact: linux-iio@vger.kernel.org
229 Inclination raw reading about axis x, y or z (may be
230 arbitrarily assigned). Data converted by application of offset
231 and scale to degrees.
233 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
234 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
235 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw
236 KernelVersion: 2.6.35
237 Contact: linux-iio@vger.kernel.org
239 Magnetic field along axis x, y or z (may be arbitrarily
240 assigned). Data converted by application of offset
243 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw
244 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw
245 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw
246 KernelVersion: 2.6.36
247 Contact: linux-iio@vger.kernel.org
249 Highest value since some reset condition. These
250 attributes allow access to this and are otherwise
251 the direct equivalent of the <type>Y[_name]_raw attributes.
253 What: /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw
254 KernelVersion: 2.6.36
255 Contact: linux-iio@vger.kernel.org
257 A computed peak value based on the sum squared magnitude of
258 the underlying value in the specified directions.
260 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw
261 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw
263 Contact: linux-iio@vger.kernel.org
265 Raw pressure measurement from channel Y. Units after
266 application of scale and offset are kilopascal.
268 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_input
269 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_input
271 Contact: linux-iio@vger.kernel.org
273 Scaled pressure measurement from channel Y, in kilopascal.
275 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw
277 Contact: linux-iio@vger.kernel.org
279 Raw humidity measurement of air. Units after application of
280 scale and offset are milli percent.
282 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input
284 Contact: linux-iio@vger.kernel.org
286 Scaled humidity measurement in milli percent.
288 What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw
290 Contact: linux-iio@vger.kernel.org
292 Averaged raw measurement from channel X. The number of values
293 used for averaging is device specific. The converting rules for
294 normal raw values also applies to the averaged raw values.
296 What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
297 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
298 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
299 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
300 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
301 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
302 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset
303 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset
304 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset
305 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset
306 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_offset
307 What: /sys/bus/iio/devices/iio:deviceX/in_current_offset
308 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset
309 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset
310 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_offset
311 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_offset
312 What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
313 What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset
314 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
315 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset
316 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset
317 What: /sys/bus/iio/devices/iio:deviceX/in_magn_offset
318 What: /sys/bus/iio/devices/iio:deviceX/in_rot_offset
319 What: /sys/bus/iio/devices/iio:deviceX/in_angl_offset
320 KernelVersion: 2.6.35
321 Contact: linux-iio@vger.kernel.org
323 If known for a device, offset to be added to <type>[Y]_raw prior
324 to scaling by <type>[Y]_scale in order to obtain value in the
325 <type> units as specified in <type>[Y]_raw documentation.
326 Not present if the offset is always 0 or unknown. If Y or
327 axis <x|y|z> is not present, then the offset applies to all
328 in channels of <type>.
329 May be writable if a variable offset can be applied on the
330 device. Note that this is different to calibbias which
331 is for devices (or drivers) that apply offsets to compensate
332 for variation between different instances of the part, typically
333 adjusted by using some hardware supported calibration procedure.
334 Calibbias is applied internally, offset is applied in userspace
337 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
338 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale
339 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale
340 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
341 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale
342 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale
343 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale
344 What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale
345 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
346 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
347 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_scale
348 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale
349 What: /sys/bus/iio/devices/iio:deviceX/in_current_scale
350 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale
351 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale
352 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_scale
353 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_scale
354 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale
355 What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
356 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
357 What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale
358 What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale
359 What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
360 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
361 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
362 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
363 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_scale
364 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_scale
365 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_scale
366 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
367 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
368 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
369 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
370 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
371 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
372 What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale
373 What: /sys/bus/iio/devices/iio:deviceX/in_angl_scale
374 KernelVersion: 2.6.35
375 Contact: linux-iio@vger.kernel.org
377 If known for a device, scale to be applied to <type>Y[_name]_raw
378 post addition of <type>[Y][_name]_offset in order to obtain the
379 measured value in <type> units as specified in
380 <type>[Y][_name]_raw documentation. If shared across all in
381 channels then Y and <x|y|z> are not present and the value is
382 called <type>[Y][_name]_scale. The peak modifier means this
383 value is applied to <type>Y[_name]_peak_raw values.
385 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias
386 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias
387 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
388 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
389 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
390 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
391 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
392 What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
393 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias
394 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias
395 KernelVersion: 2.6.35
396 Contact: linux-iio@vger.kernel.org
398 Hardware applied calibration offset (assumed to fix production
401 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
402 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
403 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
404 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
405 What /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
406 What /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
407 What /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
408 What /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
409 What /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
410 What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
411 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
412 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
413 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
414 what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
415 what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
416 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
417 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
418 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale
419 KernelVersion: 2.6.35
420 Contact: linux-iio@vger.kernel.org
422 Hardware applied calibration scale factor (assumed to fix
423 production inaccuracies). If shared across all channels,
424 <type>_calibscale is used.
426 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
427 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
428 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
429 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
431 Contact: linux-iio@vger.kernel.org
433 Gender of the user (e.g.: male, female) used by some pedometers
434 to compute the stride length, distance, speed and activity
437 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
438 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
439 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
440 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
442 Contact: linux-iio@vger.kernel.org
444 Lists all available gender values (e.g.: male, female).
446 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
447 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
448 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
449 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
451 Contact: linux-iio@vger.kernel.org
453 Height of the user (in meters) used by some pedometers
454 to compute the stride length, distance, speed and activity
457 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
459 Contact: linux-iio@vger.kernel.org
461 Weight of the user (in kg). It is needed by some pedometers
462 to compute the calories burnt by the user.
464 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
465 What: /sys/.../iio:deviceX/in_anglvel_scale_available
466 What: /sys/.../iio:deviceX/in_magn_scale_available
467 What: /sys/.../iio:deviceX/in_illuminance_scale_available
468 What: /sys/.../iio:deviceX/in_intensity_scale_available
469 What: /sys/.../iio:deviceX/in_proximity_scale_available
470 What: /sys/.../iio:deviceX/in_voltageX_scale_available
471 What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available
472 What: /sys/.../iio:deviceX/out_voltageX_scale_available
473 What: /sys/.../iio:deviceX/out_altvoltageX_scale_available
474 What: /sys/.../iio:deviceX/in_capacitance_scale_available
475 What: /sys/.../iio:deviceX/in_pressure_scale_available
476 What: /sys/.../iio:deviceX/in_pressureY_scale_available
477 KernelVersion: 2.6.35
478 Contact: linux-iio@vger.kernel.org
480 If a discrete set of scale values is available, they
481 are listed in this attribute.
483 What /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain
484 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_red_hardwaregain
485 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_green_hardwaregain
486 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_hardwaregain
487 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_hardwaregain
488 KernelVersion: 2.6.35
489 Contact: linux-iio@vger.kernel.org
491 Hardware applied gain factor. If shared across all channels,
492 <type>_hardwaregain is used.
494 What: /sys/.../in_accel_filter_low_pass_3db_frequency
495 What: /sys/.../in_magn_filter_low_pass_3db_frequency
496 What: /sys/.../in_anglvel_filter_low_pass_3db_frequency
498 Contact: linux-iio@vger.kernel.org
500 If a known or controllable low pass filter is applied
501 to the underlying data channel, then this parameter
502 gives the 3dB frequency of the filter in Hz.
504 What: /sys/.../in_accel_filter_high_pass_3db_frequency
505 What: /sys/.../in_anglvel_filter_high_pass_3db_frequency
506 What: /sys/.../in_magn_filter_high_pass_3db_frequency
508 Contact: linux-iio@vger.kernel.org
510 If a known or controllable high pass filter is applied
511 to the underlying data channel, then this parameter
512 gives the 3dB frequency of the filter in Hz.
514 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
515 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
516 KernelVersion: 2.6.37
517 Contact: linux-iio@vger.kernel.org
519 Raw (unscaled, no bias etc.) output voltage for
520 channel Y. The number must always be specified and
521 unique if the output corresponds to a single channel.
522 While DAC like devices typically use out_voltage,
523 a continuous frequency generating device, such as
524 a DDS or PLL should use out_altvoltage.
526 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
527 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
528 KernelVersion: 2.6.37
529 Contact: linux-iio@vger.kernel.org
531 Raw (unscaled, no bias etc.) output voltage for an aggregate of
532 channel Y, channel Z, etc. This interface is available in cases
533 where a single output sets the value for multiple channels
536 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
537 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
538 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
539 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
540 KernelVersion: 2.6.38
541 Contact: linux-iio@vger.kernel.org
543 Specifies the output powerdown mode.
544 DAC output stage is disconnected from the amplifier and
545 1kohm_to_gnd: connected to ground via an 1kOhm resistor,
546 2.5kohm_to_gnd: connected to ground via a 2.5kOhm resistor,
547 6kohm_to_gnd: connected to ground via a 6kOhm resistor,
548 20kohm_to_gnd: connected to ground via a 20kOhm resistor,
549 90kohm_to_gnd: connected to ground via a 90kOhm resistor,
550 100kohm_to_gnd: connected to ground via an 100kOhm resistor,
551 125kohm_to_gnd: connected to ground via an 125kOhm resistor,
552 500kohm_to_gnd: connected to ground via a 500kOhm resistor,
553 640kohm_to_gnd: connected to ground via a 640kOhm resistor,
554 three_state: left floating.
555 For a list of available output power down options read
556 outX_powerdown_mode_available. If Y is not present the
557 mode is shared across all outputs.
559 What: /sys/.../iio:deviceX/out_voltageY_powerdown_mode_available
560 What: /sys/.../iio:deviceX/out_voltage_powerdown_mode_available
561 What: /sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available
562 What: /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
563 KernelVersion: 2.6.38
564 Contact: linux-iio@vger.kernel.org
566 Lists all available output power down modes.
567 If Y is not present the mode is shared across all outputs.
569 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
570 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
571 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
572 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
573 KernelVersion: 2.6.38
574 Contact: linux-iio@vger.kernel.org
576 Writing 1 causes output Y to enter the power down mode specified
577 by the corresponding outY_powerdown_mode. DAC output stage is
578 disconnected from the amplifier. Clearing returns to normal
579 operation. Y may be suppressed if all outputs are controlled
582 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
584 Contact: linux-iio@vger.kernel.org
586 Output frequency for channel Y in Hz. The number must always be
587 specified and unique if the output corresponds to a single
590 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
592 Contact: linux-iio@vger.kernel.org
594 Phase in radians of one frequency/clock output Y
595 (out_altvoltageY) relative to another frequency/clock output
596 (out_altvoltageZ) of the device X. The number must always be
597 specified and unique if the output corresponds to a single
600 What: /sys/bus/iio/devices/iio:deviceX/events
601 KernelVersion: 2.6.35
602 Contact: linux-iio@vger.kernel.org
604 Configuration of which hardware generated events are passed up
607 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en
608 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en
609 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en
610 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en
611 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en
612 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en
613 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en
614 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en
615 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en
616 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en
617 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en
618 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en
619 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en
620 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en
621 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
622 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
623 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
624 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
625 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_rising_en
626 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_falling_en
627 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_rising_en
628 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_falling_en
629 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_en
630 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_en
631 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_rising_en
632 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_falling_en
633 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
634 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
635 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
636 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en
637 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_either_en
638 What: /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en
639 What: /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en
640 KernelVersion: 2.6.37
641 Contact: linux-iio@vger.kernel.org
643 Event generated when channel passes a threshold in the specified
644 (_rising|_falling) direction. If the direction is not specified,
645 then either the device will report an event which ever direction
646 a single threshold value is passed in (e.g.
647 <type>[Y][_name]_<raw|input>_thresh_value) or
648 <type>[Y][_name]_<raw|input>_thresh_rising_value and
649 <type>[Y][_name]_<raw|input>_thresh_falling_value may take
650 different values, but the device can only enable both thresholds
652 Note the driver will assume the last p events requested are
653 to be enabled where p is how many it supports (which may vary
654 depending on the exact set requested. So if you want to be
655 sure you have set what you think you have, check the contents of
656 these attributes after everything is configured. Drivers may
657 have to buffer any parameters so that they are consistent when
658 a given event type is enabled at a future point (and not those for
659 whatever event was previously enabled).
661 What: /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en
662 What: /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en
663 What: /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en
664 What: /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en
665 What: /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en
666 What: /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en
667 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en
668 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en
669 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en
670 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en
671 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en
672 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en
673 What: /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en
674 What: /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en
675 What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
676 What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
677 What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
678 What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
679 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_rising_en
680 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_falling_en
681 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_rising_en
682 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_falling_en
683 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_rising_en
684 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_falling_en
685 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_rising_en
686 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_falling_en
687 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
688 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
689 What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
690 What: /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en
691 What: /sys/.../iio:deviceX/events/in_tempY_roc_rising_en
692 What: /sys/.../iio:deviceX/events/in_tempY_roc_falling_en
693 KernelVersion: 2.6.37
694 Contact: linux-iio@vger.kernel.org
696 Event generated when channel passes a threshold on the rate of
697 change (1st differential) in the specified (_rising|_falling)
698 direction. If the direction is not specified, then either the
699 device will report an event which ever direction a single
700 threshold value is passed in (e.g.
701 <type>[Y][_name]_<raw|input>_roc_value) or
702 <type>[Y][_name]_<raw|input>_roc_rising_value and
703 <type>[Y][_name]_<raw|input>_roc_falling_value may take
704 different values, but the device can only enable both rate of
705 change thresholds or neither.
706 Note the driver will assume the last p events requested are
707 to be enabled where p is however many it supports (which may
708 vary depending on the exact set requested. So if you want to be
709 sure you have set what you think you have, check the contents of
710 these attributes after everything is configured. Drivers may
711 have to buffer any parameters so that they are consistent when
712 a given event type is enabled a future point (and not those for
713 whatever event was previously enabled).
715 What: /sys/.../events/in_accel_thresh_rising_value
716 What: /sys/.../events/in_accel_thresh_falling_value
717 What: /sys/.../events/in_accel_x_raw_thresh_rising_value
718 What: /sys/.../events/in_accel_x_raw_thresh_falling_value
719 What: /sys/.../events/in_accel_y_raw_thresh_rising_value
720 What: /sys/.../events/in_accel_y_raw_thresh_falling_value
721 What: /sys/.../events/in_accel_z_raw_thresh_rising_value
722 What: /sys/.../events/in_accel_z_raw_thresh_falling_value
723 What: /sys/.../events/in_anglvel_x_raw_thresh_rising_value
724 What: /sys/.../events/in_anglvel_x_raw_thresh_falling_value
725 What: /sys/.../events/in_anglvel_y_raw_thresh_rising_value
726 What: /sys/.../events/in_anglvel_y_raw_thresh_falling_value
727 What: /sys/.../events/in_anglvel_z_raw_thresh_rising_value
728 What: /sys/.../events/in_anglvel_z_raw_thresh_falling_value
729 What: /sys/.../events/in_magn_x_raw_thresh_rising_value
730 What: /sys/.../events/in_magn_x_raw_thresh_falling_value
731 What: /sys/.../events/in_magn_y_raw_thresh_rising_value
732 What: /sys/.../events/in_magn_y_raw_thresh_falling_value
733 What: /sys/.../events/in_magn_z_raw_thresh_rising_value
734 What: /sys/.../events/in_magn_z_raw_thresh_falling_value
735 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_rising_value
736 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_falling_value
737 What: /sys/.../events/in_rot_from_north_true_raw_thresh_rising_value
738 What: /sys/.../events/in_rot_from_north_true_raw_thresh_falling_value
739 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_rising_value
740 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_falling_value
741 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_rising_value
742 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_falling_value
743 What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
744 What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
745 What: /sys/.../events/in_voltageY_raw_thresh_rising_value
746 What: /sys/.../events/in_voltageY_raw_thresh_falling_value
747 What: /sys/.../events/in_tempY_raw_thresh_rising_value
748 What: /sys/.../events/in_tempY_raw_thresh_falling_value
749 What: /sys/.../events/in_illuminance0_thresh_falling_value
750 what: /sys/.../events/in_illuminance0_thresh_rising_value
751 what: /sys/.../events/in_proximity0_thresh_falling_value
752 what: /sys/.../events/in_proximity0_thresh_rising_value
753 KernelVersion: 2.6.37
754 Contact: linux-iio@vger.kernel.org
756 Specifies the value of threshold that the device is comparing
757 against for the events enabled by
758 <type>Y[_name]_thresh[_rising|falling]_en.
759 If separate attributes exist for the two directions, but
760 direction is not specified for this attribute, then a single
761 threshold value applies to both directions.
762 The raw or input element of the name indicates whether the
763 value is in raw device units or in processed units (as _raw
764 and _input do on sysfs direct channel read attributes).
766 What: /sys/.../events/in_accel_scale
767 What: /sys/.../events/in_accel_peak_scale
768 What: /sys/.../events/in_anglvel_scale
769 What: /sys/.../events/in_magn_scale
770 What: /sys/.../events/in_rot_from_north_magnetic_scale
771 What: /sys/.../events/in_rot_from_north_true_scale
772 What: /sys/.../events/in_voltage_scale
773 What: /sys/.../events/in_voltage_supply_scale
774 What: /sys/.../events/in_temp_scale
775 What: /sys/.../events/in_illuminance_scale
776 What: /sys/.../events/in_proximity_scale
778 Contact: linux-iio@vger.kernel.org
780 Specifies the conversion factor from the standard units
781 to device specific units used to set the event trigger
784 What: /sys/.../events/in_accel_x_thresh_rising_hysteresis
785 What: /sys/.../events/in_accel_x_thresh_falling_hysteresis
786 What: /sys/.../events/in_accel_x_thresh_either_hysteresis
787 What: /sys/.../events/in_accel_y_thresh_rising_hysteresis
788 What: /sys/.../events/in_accel_y_thresh_falling_hysteresis
789 What: /sys/.../events/in_accel_y_thresh_either_hysteresis
790 What: /sys/.../events/in_accel_z_thresh_rising_hysteresis
791 What: /sys/.../events/in_accel_z_thresh_falling_hysteresis
792 What: /sys/.../events/in_accel_z_thresh_either_hysteresis
793 What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis
794 What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis
795 What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis
796 What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis
797 What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis
798 What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis
799 What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis
800 What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis
801 What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis
802 What: /sys/.../events/in_magn_x_thresh_rising_hysteresis
803 What: /sys/.../events/in_magn_x_thresh_falling_hysteresis
804 What: /sys/.../events/in_magn_x_thresh_either_hysteresis
805 What: /sys/.../events/in_magn_y_thresh_rising_hysteresis
806 What: /sys/.../events/in_magn_y_thresh_falling_hysteresis
807 What: /sys/.../events/in_magn_y_thresh_either_hysteresis
808 What: /sys/.../events/in_magn_z_thresh_rising_hysteresis
809 What: /sys/.../events/in_magn_z_thresh_falling_hysteresis
810 What: /sys/.../events/in_magn_z_thresh_either_hysteresis
811 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_hysteresis
812 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_hysteresis
813 What: /sys/.../events/in_rot_from_north_magnetic_thresh_either_hysteresis
814 What: /sys/.../events/in_rot_from_north_true_thresh_rising_hysteresis
815 What: /sys/.../events/in_rot_from_north_true_thresh_falling_hysteresis
816 What: /sys/.../events/in_rot_from_north_true_thresh_either_hysteresis
817 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_hysteresis
818 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_hysteresis
819 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_either_hysteresis
820 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_hysteresis
821 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_hysteresis
822 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_either_hysteresis
823 What: /sys/.../events/in_voltageY_thresh_rising_hysteresis
824 What: /sys/.../events/in_voltageY_thresh_falling_hysteresis
825 What: /sys/.../events/in_voltageY_thresh_either_hysteresis
826 What: /sys/.../events/in_tempY_thresh_rising_hysteresis
827 What: /sys/.../events/in_tempY_thresh_falling_hysteresis
828 What: /sys/.../events/in_tempY_thresh_either_hysteresis
829 What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis
830 what: /sys/.../events/in_illuminance0_thresh_rising_hysteresis
831 what: /sys/.../events/in_illuminance0_thresh_either_hysteresis
832 what: /sys/.../events/in_proximity0_thresh_falling_hysteresis
833 what: /sys/.../events/in_proximity0_thresh_rising_hysteresis
834 what: /sys/.../events/in_proximity0_thresh_either_hysteresis
836 Contact: linux-iio@vger.kernel.org
838 Specifies the hysteresis of threshold that the device is comparing
839 against for the events enabled by
840 <type>Y[_name]_thresh[_(rising|falling)]_hysteresis.
841 If separate attributes exist for the two directions, but
842 direction is not specified for this attribute, then a single
843 hysteresis value applies to both directions.
844 For falling events the hysteresis is added to the _value attribute for
845 this event to get the upper threshold for when the event goes back to
846 normal, for rising events the hysteresis is subtracted from the _value
847 attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200
848 and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event
849 will get activated once in_voltage0_raw goes above 1200 and will become
850 deactivated again once the value falls below 1150.
852 What: /sys/.../events/in_accel_x_raw_roc_rising_value
853 What: /sys/.../events/in_accel_x_raw_roc_falling_value
854 What: /sys/.../events/in_accel_y_raw_roc_rising_value
855 What: /sys/.../events/in_accel_y_raw_roc_falling_value
856 What: /sys/.../events/in_accel_z_raw_roc_rising_value
857 What: /sys/.../events/in_accel_z_raw_roc_falling_value
858 What: /sys/.../events/in_anglvel_x_raw_roc_rising_value
859 What: /sys/.../events/in_anglvel_x_raw_roc_falling_value
860 What: /sys/.../events/in_anglvel_y_raw_roc_rising_value
861 What: /sys/.../events/in_anglvel_y_raw_roc_falling_value
862 What: /sys/.../events/in_anglvel_z_raw_roc_rising_value
863 What: /sys/.../events/in_anglvel_z_raw_roc_falling_value
864 What: /sys/.../events/in_magn_x_raw_roc_rising_value
865 What: /sys/.../events/in_magn_x_raw_roc_falling_value
866 What: /sys/.../events/in_magn_y_raw_roc_rising_value
867 What: /sys/.../events/in_magn_y_raw_roc_falling_value
868 What: /sys/.../events/in_magn_z_raw_roc_rising_value
869 What: /sys/.../events/in_magn_z_raw_roc_falling_value
870 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_rising_value
871 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_falling_value
872 What: /sys/.../events/in_rot_from_north_true_raw_roc_rising_value
873 What: /sys/.../events/in_rot_from_north_true_raw_roc_falling_value
874 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_rising_value
875 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_falling_value
876 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_rising_value
877 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_falling_value
878 What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value
879 What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value
880 What: /sys/.../events/in_voltageY_raw_roc_rising_value
881 What: /sys/.../events/in_voltageY_raw_roc_falling_value
882 What: /sys/.../events/in_tempY_raw_roc_rising_value
883 What: /sys/.../events/in_tempY_raw_roc_falling_value
884 KernelVersion: 2.6.37
885 Contact: linux-iio@vger.kernel.org
887 Specifies the value of rate of change threshold that the
888 device is comparing against for the events enabled by
889 <type>[Y][_name]_roc[_rising|falling]_en.
890 If separate attributes exist for the two directions,
891 but direction is not specified for this attribute,
892 then a single threshold value applies to both directions.
893 The raw or input element of the name indicates whether the
894 value is in raw device units or in processed units (as _raw
895 and _input do on sysfs direct channel read attributes).
897 What: /sys/.../events/in_accel_x_thresh_rising_period
898 What: /sys/.../events/in_accel_x_thresh_falling_period
899 What: /sys/.../events/in_accel_x_roc_rising_period
900 What: /sys/.../events/in_accel_x_roc_falling_period
901 What: /sys/.../events/in_accel_y_thresh_rising_period
902 What: /sys/.../events/in_accel_y_thresh_falling_period
903 What: /sys/.../events/in_accel_y_roc_rising_period
904 What: /sys/.../events/in_accel_y_roc_falling_period
905 What: /sys/.../events/in_accel_z_thresh_rising_period
906 What: /sys/.../events/in_accel_z_thresh_falling_period
907 What: /sys/.../events/in_accel_z_roc_rising_period
908 What: /sys/.../events/in_accel_z_roc_falling_period
909 What: /sys/.../events/in_anglvel_x_thresh_rising_period
910 What: /sys/.../events/in_anglvel_x_thresh_falling_period
911 What: /sys/.../events/in_anglvel_x_roc_rising_period
912 What: /sys/.../events/in_anglvel_x_roc_falling_period
913 What: /sys/.../events/in_anglvel_y_thresh_rising_period
914 What: /sys/.../events/in_anglvel_y_thresh_falling_period
915 What: /sys/.../events/in_anglvel_y_roc_rising_period
916 What: /sys/.../events/in_anglvel_y_roc_falling_period
917 What: /sys/.../events/in_anglvel_z_thresh_rising_period
918 What: /sys/.../events/in_anglvel_z_thresh_falling_period
919 What: /sys/.../events/in_anglvel_z_roc_rising_period
920 What: /sys/.../events/in_anglvel_z_roc_falling_period
921 What: /sys/.../events/in_magn_x_thresh_rising_period
922 What: /sys/.../events/in_magn_x_thresh_falling_period
923 What: /sys/.../events/in_magn_x_roc_rising_period
924 What: /sys/.../events/in_magn_x_roc_falling_period
925 What: /sys/.../events/in_magn_y_thresh_rising_period
926 What: /sys/.../events/in_magn_y_thresh_falling_period
927 What: /sys/.../events/in_magn_y_roc_rising_period
928 What: /sys/.../events/in_magn_y_roc_falling_period
929 What: /sys/.../events/in_magn_z_thresh_rising_period
930 What: /sys/.../events/in_magn_z_thresh_falling_period
931 What: /sys/.../events/in_magn_z_roc_rising_period
932 What: /sys/.../events/in_magn_z_roc_falling_period
933 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_period
934 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_period
935 What: /sys/.../events/in_rot_from_north_magnetic_roc_rising_period
936 What: /sys/.../events/in_rot_from_north_magnetic_roc_falling_period
937 What: /sys/.../events/in_rot_from_north_true_thresh_rising_period
938 What: /sys/.../events/in_rot_from_north_true_thresh_falling_period
939 What: /sys/.../events/in_rot_from_north_true_roc_rising_period
940 What: /sys/.../events/in_rot_from_north_true_roc_falling_period
941 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_period
942 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_period
943 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_rising_period
944 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_falling_period
945 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_period
946 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_period
947 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_rising_period
948 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_falling_period
949 What: /sys/.../events/in_voltageY_supply_thresh_rising_period
950 What: /sys/.../events/in_voltageY_supply_thresh_falling_period
951 What: /sys/.../events/in_voltageY_supply_roc_rising_period
952 What: /sys/.../events/in_voltageY_supply_roc_falling_period
953 What: /sys/.../events/in_voltageY_thresh_rising_period
954 What: /sys/.../events/in_voltageY_thresh_falling_period
955 What: /sys/.../events/in_voltageY_roc_rising_period
956 What: /sys/.../events/in_voltageY_roc_falling_period
957 What: /sys/.../events/in_tempY_thresh_rising_period
958 What: /sys/.../events/in_tempY_thresh_falling_period
959 What: /sys/.../events/in_tempY_roc_rising_period
960 What: /sys/.../events/in_tempY_roc_falling_period
961 What: /sys/.../events/in_accel_x&y&z_mag_falling_period
962 What: /sys/.../events/in_intensity0_thresh_period
963 What: /sys/.../events/in_proximity0_thresh_period
964 What: /sys/.../events/in_activity_still_thresh_rising_period
965 What: /sys/.../events/in_activity_still_thresh_falling_period
966 What: /sys/.../events/in_activity_walking_thresh_rising_period
967 What: /sys/.../events/in_activity_walking_thresh_falling_period
968 What: /sys/.../events/in_activity_jogging_thresh_rising_period
969 What: /sys/.../events/in_activity_jogging_thresh_falling_period
970 What: /sys/.../events/in_activity_running_thresh_rising_period
971 What: /sys/.../events/in_activity_running_thresh_falling_period
972 KernelVersion: 2.6.37
973 Contact: linux-iio@vger.kernel.org
975 Period of time (in seconds) for which the condition must be
976 met before an event is generated. If direction is not
977 specified then this period applies to both directions.
979 What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
980 What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
981 What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
983 Contact: linux-iio@vger.kernel.org
985 If a low pass filter can be applied to the event generation
986 this property gives its 3db frequency in Hz.
987 A value of zero disables the filter.
989 What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
990 What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
991 What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
993 Contact: linux-iio@vger.kernel.org
995 If a high pass filter can be applied to the event generation
996 this property gives its 3db frequency in Hz.
997 A value of zero disables the filter.
999 What: /sys/.../events/in_activity_still_thresh_rising_en
1000 What: /sys/.../events/in_activity_still_thresh_falling_en
1001 What: /sys/.../events/in_activity_walking_thresh_rising_en
1002 What: /sys/.../events/in_activity_walking_thresh_falling_en
1003 What: /sys/.../events/in_activity_jogging_thresh_rising_en
1004 What: /sys/.../events/in_activity_jogging_thresh_falling_en
1005 What: /sys/.../events/in_activity_running_thresh_rising_en
1006 What: /sys/.../events/in_activity_running_thresh_falling_en
1008 Contact: linux-iio@vger.kernel.org
1010 Enables or disables activitity events. Depending on direction
1011 an event is generated when sensor ENTERS or LEAVES a given state.
1013 What: /sys/.../events/in_activity_still_thresh_rising_value
1014 What: /sys/.../events/in_activity_still_thresh_falling_value
1015 What: /sys/.../events/in_activity_walking_thresh_rising_value
1016 What: /sys/.../events/in_activity_walking_thresh_falling_value
1017 What: /sys/.../events/in_activity_jogging_thresh_rising_value
1018 What: /sys/.../events/in_activity_jogging_thresh_falling_value
1019 What: /sys/.../events/in_activity_running_thresh_rising_value
1020 What: /sys/.../events/in_activity_running_thresh_falling_value
1022 Contact: linux-iio@vger.kernel.org
1024 Confidence value (in units as percentage) to be used
1025 for deciding when an event should be generated. E.g for
1026 running: If the confidence value reported by the sensor
1027 is greater than in_activity_running_thresh_rising_value
1028 then the sensor ENTERS running state. Conversely, if the
1029 confidence value reported by the sensor is lower than
1030 in_activity_running_thresh_falling_value then the sensor
1031 is LEAVING running state.
1033 What: /sys/.../iio:deviceX/events/in_accel_mag_en
1034 What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
1035 What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
1036 What: /sys/.../iio:deviceX/events/in_accel_x_mag_en
1037 What: /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en
1038 What: /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en
1039 What: /sys/.../iio:deviceX/events/in_accel_y_mag_en
1040 What: /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en
1041 What: /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en
1042 What: /sys/.../iio:deviceX/events/in_accel_z_mag_en
1043 What: /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en
1044 What: /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en
1045 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en
1046 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en
1047 KernelVersion: 2.6.37
1048 Contact: linux-iio@vger.kernel.org
1050 Similar to in_accel_x_thresh[_rising|_falling]_en, but here the
1051 magnitude of the channel is compared to the threshold, not its
1054 What: /sys/.../events/in_accel_raw_mag_value
1055 What: /sys/.../events/in_accel_x_raw_mag_rising_value
1056 What: /sys/.../events/in_accel_y_raw_mag_rising_value
1057 What: /sys/.../events/in_accel_z_raw_mag_rising_value
1058 KernelVersion: 2.6.37
1059 Contact: linux-iio@vger.kernel.org
1061 The value to which the magnitude of the channel is compared. If
1062 number or direction is not specified, applies to all channels of
1065 What: /sys/.../events/in_steps_change_en
1067 Contact: linux-iio@vger.kernel.org
1069 Event generated when channel passes a threshold on the absolute
1070 change in value. E.g. for steps: a step change event is
1071 generated each time the user takes N steps, where N is set using
1072 in_steps_change_value.
1074 What: /sys/.../events/in_steps_change_value
1076 Contact: linux-iio@vger.kernel.org
1078 Specifies the value of change threshold that the
1079 device is comparing against for the events enabled by
1080 <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps:
1081 if set to 3, a step change event will be generated every 3
1084 What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
1085 KernelVersion: 2.6.35
1086 Contact: linux-iio@vger.kernel.org
1088 The name of the trigger source being used, as per string given
1089 in /sys/class/iio/triggerY/name.
1091 What: /sys/bus/iio/devices/iio:deviceX/buffer/length
1092 KernelVersion: 2.6.35
1093 Contact: linux-iio@vger.kernel.org
1095 Number of scans contained by the buffer.
1097 What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
1098 KernelVersion: 2.6.35
1099 Contact: linux-iio@vger.kernel.org
1101 Actually start the buffer capture up. Will start trigger
1102 if first device and appropriate.
1104 What: /sys/bus/iio/devices/iio:deviceX/scan_elements
1105 KernelVersion: 2.6.37
1106 Contact: linux-iio@vger.kernel.org
1108 Directory containing interfaces for elements that will be
1109 captured for a single triggered sample set in the buffer.
1111 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
1112 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
1113 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
1114 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
1115 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
1116 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
1117 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
1118 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
1119 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
1120 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
1121 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
1122 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
1123 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
1124 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
1125 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
1126 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
1127 What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
1128 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
1129 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
1130 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
1131 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
1132 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
1133 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
1134 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
1135 What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
1136 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
1137 What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
1138 KernelVersion: 2.6.37
1139 Contact: linux-iio@vger.kernel.org
1141 Scan element control for triggered data capture.
1143 What: /sys/.../iio:deviceX/scan_elements/in_accel_type
1144 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_type
1145 What: /sys/.../iio:deviceX/scan_elements/in_magn_type
1146 What: /sys/.../iio:deviceX/scan_elements/in_incli_type
1147 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_type
1148 What: /sys/.../iio:deviceX/scan_elements/in_voltage_type
1149 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
1150 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
1151 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
1152 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_type
1153 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_type
1154 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_type
1155 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_type
1156 What: /sys/.../iio:deviceX/scan_elements/in_pressure_type
1157 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
1158 What: /sys/.../iio:deviceX/scan_elements/in_proximity_type
1159 KernelVersion: 2.6.37
1160 Contact: linux-iio@vger.kernel.org
1162 Description of the scan element data storage within the buffer
1163 and hence the form in which it is read from user-space.
1164 Form is [be|le]:[s|u]bits/storagebits[>>shift].
1165 be or le specifies big or little endian. s or u specifies if
1166 signed (2's complement) or unsigned. bits is the number of bits
1167 of data and storagebits is the space (after padding) that it
1168 occupies in the buffer. shift if specified, is the shift that
1169 needs to be applied prior to masking out unused bits. Some
1170 devices put their data in the middle of the transferred elements
1171 with additional information on both sides. Note that some
1172 devices will have additional information in the unused bits
1173 so to get a clean value, the bits value must be used to mask
1174 the buffer output value appropriately. The storagebits value
1175 also specifies the data alignment. So s48/64>>2 will be a
1176 signed 48 bit integer stored in a 64 bit location aligned to
1177 a 64 bit boundary. To obtain the clean value, shift right 2
1178 and apply a mask to zero the top 16 bits of the result.
1179 For other storage combinations this attribute will be extended
1182 What: /sys/.../iio:deviceX/scan_elements/in_accel_type_available
1183 KernelVersion: 2.6.37
1184 Contact: linux-iio@vger.kernel.org
1186 If the type parameter can take one of a small set of values,
1187 this attribute lists them.
1189 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_index
1190 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
1191 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
1192 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
1193 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_index
1194 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_index
1195 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_index
1196 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_index
1197 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_index
1198 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_index
1199 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_index
1200 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
1201 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_index
1202 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_index
1203 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_index
1204 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_index
1205 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_index
1206 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_index
1207 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_index
1208 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_index
1209 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
1210 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index
1211 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_index
1212 What: /sys/.../iio:deviceX/scan_elements/in_pressure_index
1213 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
1214 What: /sys/.../iio:deviceX/scan_elements/in_proximity_index
1215 KernelVersion: 2.6.37
1216 Contact: linux-iio@vger.kernel.org
1218 A single positive integer specifying the position of this
1219 scan element in the buffer. Note these are not dependent on
1220 what is enabled and may not be contiguous. Thus for user-space
1221 to establish the full layout these must be used in conjunction
1222 with all _en attributes to establish which channels are present,
1223 and the relevant _type attributes to establish the data storage
1226 What: /sys/.../iio:deviceX/in_activity_still_input
1227 What: /sys/.../iio:deviceX/in_activity_walking_input
1228 What: /sys/.../iio:deviceX/in_activity_jogging_input
1229 What: /sys/.../iio:deviceX/in_activity_running_input
1231 Contact: linux-iio@vger.kernel.org
1233 This attribute is used to read the confidence for an activity
1234 expressed in units as percentage.
1236 What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
1237 KernelVersion: 2.6.38
1238 Contact: linux-iio@vger.kernel.org
1240 This attribute is used to read the amount of quadrature error
1241 present in the device at a given time.
1243 What: /sys/.../iio:deviceX/in_accelX_power_mode
1245 Contact: linux-iio@vger.kernel.org
1247 Specifies the chip power mode.
1248 low_noise: reduce noise level from ADC,
1249 low_power: enable low current consumption.
1250 For a list of available output power modes read
1251 in_accel_power_mode_available.
1253 What: /sys/.../iio:deviceX/in_energy_input
1254 What: /sys/.../iio:deviceX/in_energy_raw
1256 Contact: linux-iio@vger.kernel.org
1258 This attribute is used to read the energy value reported by the
1259 device (e.g.: human activity sensors report energy burnt by the
1260 user). Units after application of scale are Joules.
1262 What: /sys/.../iio:deviceX/in_distance_input
1263 What: /sys/.../iio:deviceX/in_distance_raw
1265 Contact: linux-iio@vger.kernel.org
1267 This attribute is used to read the measured distance to an object
1268 or the distance covered by the user since the last reboot while
1269 activated. Units after application of scale are meters.
1271 What: /sys/bus/iio/devices/iio:deviceX/store_eeprom
1272 KernelVersion: 3.4.0
1273 Contact: linux-iio@vger.kernel.org
1275 Writing '1' stores the current device configuration into
1276 on-chip EEPROM. After power-up or chip reset the device will
1277 automatically load the saved configuration.
1279 What: /sys/.../iio:deviceX/in_proximity_raw
1280 What: /sys/.../iio:deviceX/in_proximity_input
1281 What: /sys/.../iio:deviceX/in_proximityY_raw
1283 Contact: linux-iio@vger.kernel.org
1285 Proximity measurement indicating that some
1286 object is near the sensor, usually by observing
1287 reflectivity of infrared or ultrasound emitted.
1288 Often these sensors are unit less and as such conversion
1289 to SI units is not possible. Higher proximity measurements
1290 indicate closer objects, and vice versa. Units after
1291 application of scale and offset are meters.
1293 What: /sys/.../iio:deviceX/in_illuminance_input
1294 What: /sys/.../iio:deviceX/in_illuminance_raw
1295 What: /sys/.../iio:deviceX/in_illuminanceY_input
1296 What: /sys/.../iio:deviceX/in_illuminanceY_raw
1297 What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw
1298 What: /sys/.../iio:deviceX/in_illuminance_ir_raw
1299 What: /sys/.../iio:deviceX/in_illuminance_clear_raw
1301 Contact: linux-iio@vger.kernel.org
1303 Illuminance measurement, units after application of scale
1306 What: /sys/.../iio:deviceX/in_intensityY_raw
1307 What: /sys/.../iio:deviceX/in_intensityY_ir_raw
1308 What: /sys/.../iio:deviceX/in_intensityY_both_raw
1309 What: /sys/.../iio:deviceX/in_intensityY_uv_raw
1310 What: /sys/.../iio:deviceX/in_intensityY_duv_raw
1312 Contact: linux-iio@vger.kernel.org
1314 Unit-less light intensity. Modifiers both and ir indicate
1315 that measurements contain visible and infrared light
1316 components or just infrared light, respectively. Modifier
1317 uv indicates that measurements contain ultraviolet light
1318 components. Modifier duv indicates that measurements
1319 contain deep ultraviolet light components.
1321 What: /sys/.../iio:deviceX/in_uvindex_input
1323 Contact: linux-iio@vger.kernel.org
1325 UV light intensity index measuring the human skin's response to
1326 different wavelength of sunlight weighted according to the
1327 standardised CIE Erythemal Action Spectrum. UV index values range
1328 from 0 (low) to >=11 (extreme).
1330 What: /sys/.../iio:deviceX/in_intensity_red_integration_time
1331 What: /sys/.../iio:deviceX/in_intensity_green_integration_time
1332 What: /sys/.../iio:deviceX/in_intensity_blue_integration_time
1333 What: /sys/.../iio:deviceX/in_intensity_clear_integration_time
1334 What: /sys/.../iio:deviceX/in_illuminance_integration_time
1336 Contact: linux-iio@vger.kernel.org
1338 This attribute is used to get/set the integration time in
1341 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
1343 Contact: linux-iio@vger.kernel.org
1345 Number of seconds in which to compute speed.
1347 What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
1349 Contact: linux-iio@vger.kernel.org
1351 Raw value of quaternion components using a format
1352 x y z w. Here x, y, and z component represents the axis about
1353 which a rotation will occur and w component represents the
1356 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_raw
1357 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_raw
1358 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_raw
1359 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_raw
1361 Contact: linux-iio@vger.kernel.org
1363 Raw value of rotation from true/magnetic north measured with
1364 or without compensation from tilt sensors.
1366 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_raw
1367 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw
1368 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw
1370 Contact: linux-iio@vger.kernel.org
1372 Raw current measurement from channel X. Units are in milliamps
1373 after application of scale and offset. If no offset or scale is
1374 present, output should be considered as processed with the
1377 Channels with 'i' and 'q' modifiers always exist in pairs and both
1378 channels refer to the same signal. The 'i' channel contains the in-phase
1379 component of the signal while the 'q' channel contains the quadrature
1382 What: /sys/.../iio:deviceX/in_energy_en
1383 What: /sys/.../iio:deviceX/in_distance_en
1384 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
1385 What: /sys/.../iio:deviceX/in_steps_en
1387 Contact: linux-iio@vger.kernel.org
1389 Activates a device feature that runs in firmware/hardware.
1390 E.g. for steps: the pedometer saves power while not used;
1391 when activated, it will count the steps taken by the user in
1392 firmware and export them through in_steps_input.
1394 What: /sys/.../iio:deviceX/in_steps_input
1396 Contact: linux-iio@vger.kernel.org
1398 This attribute is used to read the number of steps taken by the user
1399 since the last reboot while activated.
1401 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input
1402 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw
1404 Contact: linux-iio@vger.kernel.org
1406 This attribute is used to read the current speed value of the
1407 user (which is the norm or magnitude of the velocity vector).
1408 Units after application of scale are m/s.
1410 What: /sys/.../iio:deviceX/in_steps_debounce_count
1412 Contact: linux-iio@vger.kernel.org
1414 Specifies the number of steps that must occur within
1415 in_steps_filter_debounce_time for the pedometer to decide the
1416 consumer is making steps.
1418 What: /sys/.../iio:deviceX/in_steps_debounce_time
1420 Contact: linux-iio@vger.kernel.org
1422 Specifies number of seconds in which we compute the steps
1423 that occur in order to decide if the consumer is making steps.
1425 What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
1427 Contact: linux-iio@vger.kernel.org
1429 A single positive integer specifying the maximum number of scan
1430 elements to wait for.
1431 Poll will block until the watermark is reached.
1432 Blocking read will wait until the minimum between the requested
1433 read amount or the low water mark is available.
1434 Non-blocking read will retrieve the available samples from the
1435 buffer even if there are less samples then watermark level. This
1436 allows the application to block on poll with a timeout and read
1437 the available samples after the timeout expires and thus have a
1438 maximum delay guarantee.
1440 What: /sys/bus/iio/devices/iio:deviceX/buffer/data_available
1442 Contact: linux-iio@vger.kernel.org
1444 A read-only value indicating the bytes of data available in the
1445 buffer. In the case of an output buffer, this indicates the
1446 amount of empty space available to write data to. In the case of
1447 an input buffer, this indicates the amount of data available for
1450 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled
1452 Contact: linux-iio@vger.kernel.org
1454 A read-only boolean value that indicates if the hardware fifo is
1455 currently enabled or disabled. If the device does not have a
1456 hardware fifo this entry is not present.
1457 The hardware fifo is enabled when the buffer is enabled if the
1458 current hardware fifo watermark level is set and other current
1459 device settings allows it (e.g. if a trigger is set that samples
1460 data differently that the hardware fifo does then hardware fifo
1462 If the hardware fifo is enabled and the level of the hardware
1463 fifo reaches the hardware fifo watermark level the device will
1464 flush its hardware fifo to the device buffer. Doing a non
1465 blocking read on the device when no samples are present in the
1466 device buffer will also force a flush.
1467 When the hardware fifo is enabled there is no need to use a
1468 trigger to use buffer mode since the watermark settings
1469 guarantees that the hardware fifo is flushed to the device
1472 What: /sys/bus/iio/devices/iio:device*/buffer/hwfifo_timeout
1474 Contact: linux-iio@vger.kernel.org
1476 A read/write property to provide capability to delay reporting of
1477 samples till a timeout is reached. This allows host processors to
1478 sleep, while the sensor is storing samples in its internal fifo.
1479 The maximum timeout in seconds can be specified by setting
1480 hwfifo_timeout.The current delay can be read by reading
1481 hwfifo_timeout. A value of 0 means that there is no timeout.
1483 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
1485 Contact: linux-iio@vger.kernel.org
1487 Read-only entry that contains a single integer specifying the
1488 current watermark level for the hardware fifo. If the device
1489 does not have a hardware fifo this entry is not present.
1490 The watermark level for the hardware fifo is set by the driver
1491 based on the value set by the user in buffer/watermark but
1492 taking into account hardware limitations (e.g. most hardware
1493 buffers are limited to 32-64 samples, some hardware buffers
1494 watermarks are fixed or have minimum levels). A value of 0
1495 means that the hardware watermark is unset.
1497 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min
1499 Contact: linux-iio@vger.kernel.org
1501 A single positive integer specifying the minimum watermark level
1502 for the hardware fifo of this device. If the device does not
1503 have a hardware fifo this entry is not present.
1504 If the user sets buffer/watermark to a value less than this one,
1505 then the hardware watermark will remain unset.
1507 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max
1509 Contact: linux-iio@vger.kernel.org
1511 A single positive integer specifying the maximum watermark level
1512 for the hardware fifo of this device. If the device does not
1513 have a hardware fifo this entry is not present.
1514 If the user sets buffer/watermark to a value greater than this
1515 one, then the hardware watermark will be capped at this value.
1517 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available
1519 Contact: linux-iio@vger.kernel.org
1521 A list of positive integers specifying the available watermark
1522 levels for the hardware fifo. This entry is optional and if it
1523 is not present it means that all the values between
1524 hwfifo_watermark_min and hwfifo_watermark_max are supported.
1525 If the user sets buffer/watermark to a value greater than
1526 hwfifo_watermak_min but not equal to any of the values in this
1527 list, the driver will chose an appropriate value for the
1528 hardware fifo watermark level.
1530 What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity
1531 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity
1532 What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity
1533 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity
1535 Contact: linux-iio@vger.kernel.org
1537 The emissivity ratio of the surface in the field of view of the
1538 contactless temperature sensor. Emissivity varies from 0 to 1,
1539 with 1 being the emissivity of a black body.
1541 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio
1542 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio
1543 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio
1545 Contact: linux-iio@vger.kernel.org
1547 Hardware applied number of measurements for acquiring one
1548 data point. The HW will do <type>[_name]_oversampling_ratio
1549 measurements and return the average value as output data. Each
1550 value resulted from <type>[_name]_oversampling_ratio measurements
1551 is considered as one sample for <type>[_name]_sampling_frequency.
1553 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw
1554 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw
1555 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw
1556 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw
1557 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw
1558 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw
1560 Contact: linux-iio@vger.kernel.org
1562 Raw (unscaled no offset etc.) percentage reading of a substance.
1564 What: /sys/bus/iio/devices/iio:deviceX/in_resistance_raw
1565 What: /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw
1566 What: /sys/bus/iio/devices/iio:deviceX/out_resistance_raw
1567 What: /sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
1569 Contact: linux-iio@vger.kernel.org
1571 Raw (unscaled no offset etc.) resistance reading that can be processed
1574 What: /sys/bus/iio/devices/iio:deviceX/heater_enable
1575 KernelVersion: 4.1.0
1576 Contact: linux-iio@vger.kernel.org
1578 '1' (enable) or '0' (disable) specifying the enable
1579 of heater function. Same reading values apply
1580 This ABI is especially applicable for humidity sensors
1581 to heatup the device and get rid of any condensation
1582 in some humidity environment
1584 What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
1586 Contact: linux-iio@vger.kernel.org
1588 Raw (unscaled no offset etc.) pH reading of a substance as a negative
1589 base-10 logarithm of hydrodium ions in a litre of water.
1591 What: /sys/bus/iio/devices/iio:deviceX/mount_matrix
1592 What: /sys/bus/iio/devices/iio:deviceX/in_mount_matrix
1593 What: /sys/bus/iio/devices/iio:deviceX/out_mount_matrix
1594 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_mount_matrix
1595 What: /sys/bus/iio/devices/iio:deviceX/in_accel_mount_matrix
1597 Contact: linux-iio@vger.kernel.org
1599 Mounting matrix for IIO sensors. This is a rotation matrix which
1600 informs userspace about sensor chip's placement relative to the
1601 main hardware it is mounted on.
1602 Main hardware placement is defined according to the local
1603 reference frame related to the physical quantity the sensor
1605 Given that the rotation matrix is defined in a board specific
1606 way (platform data and / or device-tree), the main hardware
1607 reference frame definition is left to the implementor's choice
1608 (see below for a magnetometer example).
1609 Applications should apply this rotation matrix to samples so
1610 that when main hardware reference frame is aligned onto local
1611 reference frame, then sensor chip reference frame is also
1612 perfectly aligned with it.
1613 Matrix is a 3x3 unitary matrix and typically looks like
1614 [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
1615 [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
1616 are perfectly aligned with each other.
1618 For example, a mounting matrix for a magnetometer sensor informs
1619 userspace about sensor chip's ORIENTATION relative to the main
1621 More specifically, main hardware orientation is defined with
1622 respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
1623 * Y is in the ground plane and positive towards magnetic North ;
1624 * X is in the ground plane, perpendicular to the North axis and
1625 positive towards the East ;
1626 * Z is perpendicular to the ground plane and positive upwards.
1628 An implementor might consider that for a hand-held device, a
1629 'natural' orientation would be 'front facing camera at the top'.
1630 The main hardware reference frame could then be described as :
1631 * Y is in the plane of the screen and is positive towards the
1633 * X is in the plane of the screen, perpendicular to Y axis, and
1634 positive towards the right hand side of the screen ;
1635 * Z is perpendicular to the screen plane and positive out of the
1637 Another example for a quadrotor UAV might be :
1638 * Y is in the plane of the propellers and positive towards the
1640 * X is in the plane of the propellers, perpendicular to Y axis,
1641 and positive towards the starboard side of the UAV ;
1642 * Z is perpendicular to propellers plane and positive upwards.
1644 What: /sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
1646 Contact: linux-iio@vger.kernel.org
1648 Raw (unscaled no offset etc.) electric conductivity reading that
1649 can be processed to siemens per meter.
1651 What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw
1653 Contact: linux-iio@vger.kernel.org
1655 Raw counter device counts from channel Y. For quadrature
1656 counters, multiplication by an available [Y]_scale results in
1657 the counts of a single quadrature signal phase from channel Y.
1659 What: /sys/bus/iio/devices/iio:deviceX/in_indexY_raw
1661 Contact: linux-iio@vger.kernel.org
1663 Raw counter device index value from channel Y. This attribute
1664 provides an absolute positional reference (e.g. a pulse once per
1665 revolution) which may be used to home positional systems as
1668 What: /sys/bus/iio/devices/iio:deviceX/in_count_count_direction_available
1670 Contact: linux-iio@vger.kernel.org
1672 A list of possible counting directions which are:
1673 - "up" : counter device is increasing.
1674 - "down": counter device is decreasing.
1676 What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_direction
1678 Contact: linux-iio@vger.kernel.org
1680 Raw counter device counters direction for channel Y.
1682 What: /sys/bus/iio/devices/iio:deviceX/in_phaseY_raw
1684 Contact: linux-iio@vger.kernel.org
1686 Raw (unscaled) phase difference reading from channel Y
1687 that can be processed to radians.
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