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/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_anglvel_x_raw
194 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
195 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
196 KernelVersion: 2.6.35
197 Contact: linux-iio@vger.kernel.org
199 Angular velocity about axis x, y or z (may be arbitrarily
200 assigned). Has all the equivalent parameters as per voltageY.
201 Units after application of scale and offset are radians per
204 What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw
205 What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw
206 What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw
207 KernelVersion: 2.6.35
208 Contact: linux-iio@vger.kernel.org
210 Inclination raw reading about axis x, y or z (may be
211 arbitrarily assigned). Data converted by application of offset
212 and scale to degrees.
214 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
215 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
216 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw
217 KernelVersion: 2.6.35
218 Contact: linux-iio@vger.kernel.org
220 Magnetic field along axis x, y or z (may be arbitrarily
221 assigned). Data converted by application of offset
224 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw
225 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw
226 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw
227 KernelVersion: 2.6.36
228 Contact: linux-iio@vger.kernel.org
230 Highest value since some reset condition. These
231 attributes allow access to this and are otherwise
232 the direct equivalent of the <type>Y[_name]_raw attributes.
234 What: /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw
235 KernelVersion: 2.6.36
236 Contact: linux-iio@vger.kernel.org
238 A computed peak value based on the sum squared magnitude of
239 the underlying value in the specified directions.
241 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw
242 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw
244 Contact: linux-iio@vger.kernel.org
246 Raw pressure measurement from channel Y. Units after
247 application of scale and offset are kilopascal.
249 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_input
250 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_input
252 Contact: linux-iio@vger.kernel.org
254 Scaled pressure measurement from channel Y, in kilopascal.
256 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw
258 Contact: linux-iio@vger.kernel.org
260 Raw humidity measurement of air. Units after application of
261 scale and offset are milli percent.
263 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input
265 Contact: linux-iio@vger.kernel.org
267 Scaled humidity measurement in milli percent.
269 What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw
271 Contact: linux-iio@vger.kernel.org
273 Averaged raw measurement from channel X. The number of values
274 used for averaging is device specific. The converting rules for
275 normal raw values also applies to the averaged raw values.
277 What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
278 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
279 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
280 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
281 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
282 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
283 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset
284 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset
285 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset
286 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset
287 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_offset
288 What: /sys/bus/iio/devices/iio:deviceX/in_current_offset
289 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset
290 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset
291 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_offset
292 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_offset
293 What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
294 What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset
295 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
296 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset
297 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset
298 What: /sys/bus/iio/devices/iio:deviceX/in_magn_offset
299 What: /sys/bus/iio/devices/iio:deviceX/in_rot_offset
300 KernelVersion: 2.6.35
301 Contact: linux-iio@vger.kernel.org
303 If known for a device, offset to be added to <type>[Y]_raw prior
304 to scaling by <type>[Y]_scale in order to obtain value in the
305 <type> units as specified in <type>[Y]_raw documentation.
306 Not present if the offset is always 0 or unknown. If Y or
307 axis <x|y|z> is not present, then the offset applies to all
308 in channels of <type>.
309 May be writable if a variable offset can be applied on the
310 device. Note that this is different to calibbias which
311 is for devices (or drivers) that apply offsets to compensate
312 for variation between different instances of the part, typically
313 adjusted by using some hardware supported calibration procedure.
314 Calibbias is applied internally, offset is applied in userspace
317 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
318 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale
319 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale
320 What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
321 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale
322 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale
323 What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale
324 What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale
325 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
326 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
327 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_scale
328 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale
329 What: /sys/bus/iio/devices/iio:deviceX/in_current_scale
330 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale
331 What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale
332 What: /sys/bus/iio/devices/iio:deviceX/in_current_i_scale
333 What: /sys/bus/iio/devices/iio:deviceX/in_current_q_scale
334 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale
335 What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
336 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
337 What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale
338 What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale
339 What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
340 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
341 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
342 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
343 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_scale
344 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_scale
345 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_scale
346 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
347 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
348 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
349 What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
350 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
351 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
352 What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale
353 KernelVersion: 2.6.35
354 Contact: linux-iio@vger.kernel.org
356 If known for a device, scale to be applied to <type>Y[_name]_raw
357 post addition of <type>[Y][_name]_offset in order to obtain the
358 measured value in <type> units as specified in
359 <type>[Y][_name]_raw documentation. If shared across all in
360 channels then Y and <x|y|z> are not present and the value is
361 called <type>[Y][_name]_scale. The peak modifier means this
362 value is applied to <type>Y[_name]_peak_raw values.
364 What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias
365 What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias
366 What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
367 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
368 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
369 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
370 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
371 What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
372 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias
373 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias
374 KernelVersion: 2.6.35
375 Contact: linux-iio@vger.kernel.org
377 Hardware applied calibration offset (assumed to fix production
380 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
381 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
382 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
383 What /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
384 What /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
385 What /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
386 What /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
387 What /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
388 What /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
389 What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
390 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
391 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
392 What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
393 what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
394 what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
395 What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
396 What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
397 What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale
398 KernelVersion: 2.6.35
399 Contact: linux-iio@vger.kernel.org
401 Hardware applied calibration scale factor (assumed to fix
402 production inaccuracies). If shared across all channels,
403 <type>_calibscale is used.
405 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
406 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
407 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
408 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
410 Contact: linux-iio@vger.kernel.org
412 Gender of the user (e.g.: male, female) used by some pedometers
413 to compute the stride length, distance, speed and activity
416 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
417 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
418 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
419 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
421 Contact: linux-iio@vger.kernel.org
423 Lists all available gender values (e.g.: male, female).
425 What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
426 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
427 What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
428 What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
430 Contact: linux-iio@vger.kernel.org
432 Height of the user (in meters) used by some pedometers
433 to compute the stride length, distance, speed and activity
436 What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
438 Contact: linux-iio@vger.kernel.org
440 Weight of the user (in kg). It is needed by some pedometers
441 to compute the calories burnt by the user.
443 What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
444 What: /sys/.../iio:deviceX/in_anglvel_scale_available
445 What: /sys/.../iio:deviceX/in_magn_scale_available
446 What: /sys/.../iio:deviceX/in_illuminance_scale_available
447 What: /sys/.../iio:deviceX/in_intensity_scale_available
448 What: /sys/.../iio:deviceX/in_proximity_scale_available
449 What: /sys/.../iio:deviceX/in_voltageX_scale_available
450 What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available
451 What: /sys/.../iio:deviceX/out_voltageX_scale_available
452 What: /sys/.../iio:deviceX/out_altvoltageX_scale_available
453 What: /sys/.../iio:deviceX/in_capacitance_scale_available
454 What: /sys/.../iio:deviceX/in_pressure_scale_available
455 What: /sys/.../iio:deviceX/in_pressureY_scale_available
456 KernelVersion: 2.6.35
457 Contact: linux-iio@vger.kernel.org
459 If a discrete set of scale values is available, they
460 are listed in this attribute.
462 What /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain
463 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_red_hardwaregain
464 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_green_hardwaregain
465 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_hardwaregain
466 What: /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_hardwaregain
467 KernelVersion: 2.6.35
468 Contact: linux-iio@vger.kernel.org
470 Hardware applied gain factor. If shared across all channels,
471 <type>_hardwaregain is used.
473 What: /sys/.../in_accel_filter_low_pass_3db_frequency
474 What: /sys/.../in_magn_filter_low_pass_3db_frequency
475 What: /sys/.../in_anglvel_filter_low_pass_3db_frequency
477 Contact: linux-iio@vger.kernel.org
479 If a known or controllable low pass filter is applied
480 to the underlying data channel, then this parameter
481 gives the 3dB frequency of the filter in Hz.
483 What: /sys/.../in_accel_filter_high_pass_3db_frequency
484 What: /sys/.../in_anglvel_filter_high_pass_3db_frequency
485 What: /sys/.../in_magn_filter_high_pass_3db_frequency
487 Contact: linux-iio@vger.kernel.org
489 If a known or controllable high pass filter is applied
490 to the underlying data channel, then this parameter
491 gives the 3dB frequency of the filter in Hz.
493 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
494 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
495 KernelVersion: 2.6.37
496 Contact: linux-iio@vger.kernel.org
498 Raw (unscaled, no bias etc.) output voltage for
499 channel Y. The number must always be specified and
500 unique if the output corresponds to a single channel.
501 While DAC like devices typically use out_voltage,
502 a continuous frequency generating device, such as
503 a DDS or PLL should use out_altvoltage.
505 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
506 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
507 KernelVersion: 2.6.37
508 Contact: linux-iio@vger.kernel.org
510 Raw (unscaled, no bias etc.) output voltage for an aggregate of
511 channel Y, channel Z, etc. This interface is available in cases
512 where a single output sets the value for multiple channels
515 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
516 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
517 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
518 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
519 KernelVersion: 2.6.38
520 Contact: linux-iio@vger.kernel.org
522 Specifies the output powerdown mode.
523 DAC output stage is disconnected from the amplifier and
524 1kohm_to_gnd: connected to ground via an 1kOhm resistor,
525 6kohm_to_gnd: connected to ground via a 6kOhm resistor,
526 20kohm_to_gnd: connected to ground via a 20kOhm resistor,
527 90kohm_to_gnd: connected to ground via a 90kOhm resistor,
528 100kohm_to_gnd: connected to ground via an 100kOhm resistor,
529 125kohm_to_gnd: connected to ground via an 125kOhm resistor,
530 500kohm_to_gnd: connected to ground via a 500kOhm resistor,
531 640kohm_to_gnd: connected to ground via a 640kOhm resistor,
532 three_state: left floating.
533 For a list of available output power down options read
534 outX_powerdown_mode_available. If Y is not present the
535 mode is shared across all outputs.
537 What: /sys/.../iio:deviceX/out_voltageY_powerdown_mode_available
538 What: /sys/.../iio:deviceX/out_voltage_powerdown_mode_available
539 What: /sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available
540 What: /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
541 KernelVersion: 2.6.38
542 Contact: linux-iio@vger.kernel.org
544 Lists all available output power down modes.
545 If Y is not present the mode is shared across all outputs.
547 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
548 What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
549 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
550 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
551 KernelVersion: 2.6.38
552 Contact: linux-iio@vger.kernel.org
554 Writing 1 causes output Y to enter the power down mode specified
555 by the corresponding outY_powerdown_mode. DAC output stage is
556 disconnected from the amplifier. Clearing returns to normal
557 operation. Y may be suppressed if all outputs are controlled
560 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
562 Contact: linux-iio@vger.kernel.org
564 Output frequency for channel Y in Hz. The number must always be
565 specified and unique if the output corresponds to a single
568 What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
570 Contact: linux-iio@vger.kernel.org
572 Phase in radians of one frequency/clock output Y
573 (out_altvoltageY) relative to another frequency/clock output
574 (out_altvoltageZ) of the device X. The number must always be
575 specified and unique if the output corresponds to a single
578 What: /sys/bus/iio/devices/iio:deviceX/events
579 KernelVersion: 2.6.35
580 Contact: linux-iio@vger.kernel.org
582 Configuration of which hardware generated events are passed up
585 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en
586 What: /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en
587 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en
588 What: /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en
589 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en
590 What: /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en
591 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en
592 What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en
593 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en
594 What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en
595 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en
596 What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en
597 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en
598 What: /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en
599 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
600 What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
601 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
602 What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
603 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_rising_en
604 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_falling_en
605 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_rising_en
606 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_falling_en
607 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_en
608 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_en
609 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_rising_en
610 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_falling_en
611 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
612 What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
613 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
614 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en
615 What: /sys/.../iio:deviceX/events/in_voltageY_thresh_either_en
616 What: /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en
617 What: /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en
618 KernelVersion: 2.6.37
619 Contact: linux-iio@vger.kernel.org
621 Event generated when channel passes a threshold in the specified
622 (_rising|_falling) direction. If the direction is not specified,
623 then either the device will report an event which ever direction
624 a single threshold value is passed in (e.g.
625 <type>[Y][_name]_<raw|input>_thresh_value) or
626 <type>[Y][_name]_<raw|input>_thresh_rising_value and
627 <type>[Y][_name]_<raw|input>_thresh_falling_value may take
628 different values, but the device can only enable both thresholds
630 Note the driver will assume the last p events requested are
631 to be enabled where p is how many it supports (which may vary
632 depending on the exact set requested. So if you want to be
633 sure you have set what you think you have, check the contents of
634 these attributes after everything is configured. Drivers may
635 have to buffer any parameters so that they are consistent when
636 a given event type is enabled at a future point (and not those for
637 whatever event was previously enabled).
639 What: /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en
640 What: /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en
641 What: /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en
642 What: /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en
643 What: /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en
644 What: /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en
645 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en
646 What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en
647 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en
648 What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en
649 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en
650 What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en
651 What: /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en
652 What: /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en
653 What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
654 What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
655 What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
656 What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
657 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_rising_en
658 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_falling_en
659 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_rising_en
660 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_falling_en
661 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_rising_en
662 What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_falling_en
663 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_rising_en
664 What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_falling_en
665 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
666 What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
667 What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
668 What: /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en
669 What: /sys/.../iio:deviceX/events/in_tempY_roc_rising_en
670 What: /sys/.../iio:deviceX/events/in_tempY_roc_falling_en
671 KernelVersion: 2.6.37
672 Contact: linux-iio@vger.kernel.org
674 Event generated when channel passes a threshold on the rate of
675 change (1st differential) in the specified (_rising|_falling)
676 direction. If the direction is not specified, then either the
677 device will report an event which ever direction a single
678 threshold value is passed in (e.g.
679 <type>[Y][_name]_<raw|input>_roc_value) or
680 <type>[Y][_name]_<raw|input>_roc_rising_value and
681 <type>[Y][_name]_<raw|input>_roc_falling_value may take
682 different values, but the device can only enable both rate of
683 change thresholds or neither.
684 Note the driver will assume the last p events requested are
685 to be enabled where p is however many it supports (which may
686 vary depending on the exact set requested. So if you want to be
687 sure you have set what you think you have, check the contents of
688 these attributes after everything is configured. Drivers may
689 have to buffer any parameters so that they are consistent when
690 a given event type is enabled a future point (and not those for
691 whatever event was previously enabled).
693 What: /sys/.../events/in_accel_thresh_rising_value
694 What: /sys/.../events/in_accel_thresh_falling_value
695 What: /sys/.../events/in_accel_x_raw_thresh_rising_value
696 What: /sys/.../events/in_accel_x_raw_thresh_falling_value
697 What: /sys/.../events/in_accel_y_raw_thresh_rising_value
698 What: /sys/.../events/in_accel_y_raw_thresh_falling_value
699 What: /sys/.../events/in_accel_z_raw_thresh_rising_value
700 What: /sys/.../events/in_accel_z_raw_thresh_falling_value
701 What: /sys/.../events/in_anglvel_x_raw_thresh_rising_value
702 What: /sys/.../events/in_anglvel_x_raw_thresh_falling_value
703 What: /sys/.../events/in_anglvel_y_raw_thresh_rising_value
704 What: /sys/.../events/in_anglvel_y_raw_thresh_falling_value
705 What: /sys/.../events/in_anglvel_z_raw_thresh_rising_value
706 What: /sys/.../events/in_anglvel_z_raw_thresh_falling_value
707 What: /sys/.../events/in_magn_x_raw_thresh_rising_value
708 What: /sys/.../events/in_magn_x_raw_thresh_falling_value
709 What: /sys/.../events/in_magn_y_raw_thresh_rising_value
710 What: /sys/.../events/in_magn_y_raw_thresh_falling_value
711 What: /sys/.../events/in_magn_z_raw_thresh_rising_value
712 What: /sys/.../events/in_magn_z_raw_thresh_falling_value
713 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_rising_value
714 What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_falling_value
715 What: /sys/.../events/in_rot_from_north_true_raw_thresh_rising_value
716 What: /sys/.../events/in_rot_from_north_true_raw_thresh_falling_value
717 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_rising_value
718 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_falling_value
719 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_rising_value
720 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_falling_value
721 What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
722 What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
723 What: /sys/.../events/in_voltageY_raw_thresh_rising_value
724 What: /sys/.../events/in_voltageY_raw_thresh_falling_value
725 What: /sys/.../events/in_tempY_raw_thresh_rising_value
726 What: /sys/.../events/in_tempY_raw_thresh_falling_value
727 What: /sys/.../events/in_illuminance0_thresh_falling_value
728 what: /sys/.../events/in_illuminance0_thresh_rising_value
729 what: /sys/.../events/in_proximity0_thresh_falling_value
730 what: /sys/.../events/in_proximity0_thresh_rising_value
731 KernelVersion: 2.6.37
732 Contact: linux-iio@vger.kernel.org
734 Specifies the value of threshold that the device is comparing
735 against for the events enabled by
736 <type>Y[_name]_thresh[_rising|falling]_en.
737 If separate attributes exist for the two directions, but
738 direction is not specified for this attribute, then a single
739 threshold value applies to both directions.
740 The raw or input element of the name indicates whether the
741 value is in raw device units or in processed units (as _raw
742 and _input do on sysfs direct channel read attributes).
744 What: /sys/.../events/in_accel_scale
745 What: /sys/.../events/in_accel_peak_scale
746 What: /sys/.../events/in_anglvel_scale
747 What: /sys/.../events/in_magn_scale
748 What: /sys/.../events/in_rot_from_north_magnetic_scale
749 What: /sys/.../events/in_rot_from_north_true_scale
750 What: /sys/.../events/in_voltage_scale
751 What: /sys/.../events/in_voltage_supply_scale
752 What: /sys/.../events/in_temp_scale
753 What: /sys/.../events/in_illuminance_scale
754 What: /sys/.../events/in_proximity_scale
756 Contact: linux-iio@vger.kernel.org
758 Specifies the conversion factor from the standard units
759 to device specific units used to set the event trigger
762 What: /sys/.../events/in_accel_x_thresh_rising_hysteresis
763 What: /sys/.../events/in_accel_x_thresh_falling_hysteresis
764 What: /sys/.../events/in_accel_x_thresh_either_hysteresis
765 What: /sys/.../events/in_accel_y_thresh_rising_hysteresis
766 What: /sys/.../events/in_accel_y_thresh_falling_hysteresis
767 What: /sys/.../events/in_accel_y_thresh_either_hysteresis
768 What: /sys/.../events/in_accel_z_thresh_rising_hysteresis
769 What: /sys/.../events/in_accel_z_thresh_falling_hysteresis
770 What: /sys/.../events/in_accel_z_thresh_either_hysteresis
771 What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis
772 What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis
773 What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis
774 What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis
775 What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis
776 What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis
777 What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis
778 What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis
779 What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis
780 What: /sys/.../events/in_magn_x_thresh_rising_hysteresis
781 What: /sys/.../events/in_magn_x_thresh_falling_hysteresis
782 What: /sys/.../events/in_magn_x_thresh_either_hysteresis
783 What: /sys/.../events/in_magn_y_thresh_rising_hysteresis
784 What: /sys/.../events/in_magn_y_thresh_falling_hysteresis
785 What: /sys/.../events/in_magn_y_thresh_either_hysteresis
786 What: /sys/.../events/in_magn_z_thresh_rising_hysteresis
787 What: /sys/.../events/in_magn_z_thresh_falling_hysteresis
788 What: /sys/.../events/in_magn_z_thresh_either_hysteresis
789 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_hysteresis
790 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_hysteresis
791 What: /sys/.../events/in_rot_from_north_magnetic_thresh_either_hysteresis
792 What: /sys/.../events/in_rot_from_north_true_thresh_rising_hysteresis
793 What: /sys/.../events/in_rot_from_north_true_thresh_falling_hysteresis
794 What: /sys/.../events/in_rot_from_north_true_thresh_either_hysteresis
795 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_hysteresis
796 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_hysteresis
797 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_either_hysteresis
798 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_hysteresis
799 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_hysteresis
800 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_either_hysteresis
801 What: /sys/.../events/in_voltageY_thresh_rising_hysteresis
802 What: /sys/.../events/in_voltageY_thresh_falling_hysteresis
803 What: /sys/.../events/in_voltageY_thresh_either_hysteresis
804 What: /sys/.../events/in_tempY_thresh_rising_hysteresis
805 What: /sys/.../events/in_tempY_thresh_falling_hysteresis
806 What: /sys/.../events/in_tempY_thresh_either_hysteresis
807 What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis
808 what: /sys/.../events/in_illuminance0_thresh_rising_hysteresis
809 what: /sys/.../events/in_illuminance0_thresh_either_hysteresis
810 what: /sys/.../events/in_proximity0_thresh_falling_hysteresis
811 what: /sys/.../events/in_proximity0_thresh_rising_hysteresis
812 what: /sys/.../events/in_proximity0_thresh_either_hysteresis
814 Contact: linux-iio@vger.kernel.org
816 Specifies the hysteresis of threshold that the device is comparing
817 against for the events enabled by
818 <type>Y[_name]_thresh[_(rising|falling)]_hysteresis.
819 If separate attributes exist for the two directions, but
820 direction is not specified for this attribute, then a single
821 hysteresis value applies to both directions.
822 For falling events the hysteresis is added to the _value attribute for
823 this event to get the upper threshold for when the event goes back to
824 normal, for rising events the hysteresis is subtracted from the _value
825 attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200
826 and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event
827 will get activated once in_voltage0_raw goes above 1200 and will become
828 deactivated again once the value falls below 1150.
830 What: /sys/.../events/in_accel_x_raw_roc_rising_value
831 What: /sys/.../events/in_accel_x_raw_roc_falling_value
832 What: /sys/.../events/in_accel_y_raw_roc_rising_value
833 What: /sys/.../events/in_accel_y_raw_roc_falling_value
834 What: /sys/.../events/in_accel_z_raw_roc_rising_value
835 What: /sys/.../events/in_accel_z_raw_roc_falling_value
836 What: /sys/.../events/in_anglvel_x_raw_roc_rising_value
837 What: /sys/.../events/in_anglvel_x_raw_roc_falling_value
838 What: /sys/.../events/in_anglvel_y_raw_roc_rising_value
839 What: /sys/.../events/in_anglvel_y_raw_roc_falling_value
840 What: /sys/.../events/in_anglvel_z_raw_roc_rising_value
841 What: /sys/.../events/in_anglvel_z_raw_roc_falling_value
842 What: /sys/.../events/in_magn_x_raw_roc_rising_value
843 What: /sys/.../events/in_magn_x_raw_roc_falling_value
844 What: /sys/.../events/in_magn_y_raw_roc_rising_value
845 What: /sys/.../events/in_magn_y_raw_roc_falling_value
846 What: /sys/.../events/in_magn_z_raw_roc_rising_value
847 What: /sys/.../events/in_magn_z_raw_roc_falling_value
848 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_rising_value
849 What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_falling_value
850 What: /sys/.../events/in_rot_from_north_true_raw_roc_rising_value
851 What: /sys/.../events/in_rot_from_north_true_raw_roc_falling_value
852 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_rising_value
853 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_falling_value
854 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_rising_value
855 What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_falling_value
856 What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value
857 What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value
858 What: /sys/.../events/in_voltageY_raw_roc_rising_value
859 What: /sys/.../events/in_voltageY_raw_roc_falling_value
860 What: /sys/.../events/in_tempY_raw_roc_rising_value
861 What: /sys/.../events/in_tempY_raw_roc_falling_value
862 KernelVersion: 2.6.37
863 Contact: linux-iio@vger.kernel.org
865 Specifies the value of rate of change threshold that the
866 device is comparing against for the events enabled by
867 <type>[Y][_name]_roc[_rising|falling]_en.
868 If separate attributes exist for the two directions,
869 but direction is not specified for this attribute,
870 then a single threshold value applies to both directions.
871 The raw or input element of the name indicates whether the
872 value is in raw device units or in processed units (as _raw
873 and _input do on sysfs direct channel read attributes).
875 What: /sys/.../events/in_accel_x_thresh_rising_period
876 What: /sys/.../events/in_accel_x_thresh_falling_period
877 What: /sys/.../events/in_accel_x_roc_rising_period
878 What: /sys/.../events/in_accel_x_roc_falling_period
879 What: /sys/.../events/in_accel_y_thresh_rising_period
880 What: /sys/.../events/in_accel_y_thresh_falling_period
881 What: /sys/.../events/in_accel_y_roc_rising_period
882 What: /sys/.../events/in_accel_y_roc_falling_period
883 What: /sys/.../events/in_accel_z_thresh_rising_period
884 What: /sys/.../events/in_accel_z_thresh_falling_period
885 What: /sys/.../events/in_accel_z_roc_rising_period
886 What: /sys/.../events/in_accel_z_roc_falling_period
887 What: /sys/.../events/in_anglvel_x_thresh_rising_period
888 What: /sys/.../events/in_anglvel_x_thresh_falling_period
889 What: /sys/.../events/in_anglvel_x_roc_rising_period
890 What: /sys/.../events/in_anglvel_x_roc_falling_period
891 What: /sys/.../events/in_anglvel_y_thresh_rising_period
892 What: /sys/.../events/in_anglvel_y_thresh_falling_period
893 What: /sys/.../events/in_anglvel_y_roc_rising_period
894 What: /sys/.../events/in_anglvel_y_roc_falling_period
895 What: /sys/.../events/in_anglvel_z_thresh_rising_period
896 What: /sys/.../events/in_anglvel_z_thresh_falling_period
897 What: /sys/.../events/in_anglvel_z_roc_rising_period
898 What: /sys/.../events/in_anglvel_z_roc_falling_period
899 What: /sys/.../events/in_magn_x_thresh_rising_period
900 What: /sys/.../events/in_magn_x_thresh_falling_period
901 What: /sys/.../events/in_magn_x_roc_rising_period
902 What: /sys/.../events/in_magn_x_roc_falling_period
903 What: /sys/.../events/in_magn_y_thresh_rising_period
904 What: /sys/.../events/in_magn_y_thresh_falling_period
905 What: /sys/.../events/in_magn_y_roc_rising_period
906 What: /sys/.../events/in_magn_y_roc_falling_period
907 What: /sys/.../events/in_magn_z_thresh_rising_period
908 What: /sys/.../events/in_magn_z_thresh_falling_period
909 What: /sys/.../events/in_magn_z_roc_rising_period
910 What: /sys/.../events/in_magn_z_roc_falling_period
911 What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_period
912 What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_period
913 What: /sys/.../events/in_rot_from_north_magnetic_roc_rising_period
914 What: /sys/.../events/in_rot_from_north_magnetic_roc_falling_period
915 What: /sys/.../events/in_rot_from_north_true_thresh_rising_period
916 What: /sys/.../events/in_rot_from_north_true_thresh_falling_period
917 What: /sys/.../events/in_rot_from_north_true_roc_rising_period
918 What: /sys/.../events/in_rot_from_north_true_roc_falling_period
919 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_period
920 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_period
921 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_rising_period
922 What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_falling_period
923 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_period
924 What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_period
925 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_rising_period
926 What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_falling_period
927 What: /sys/.../events/in_voltageY_supply_thresh_rising_period
928 What: /sys/.../events/in_voltageY_supply_thresh_falling_period
929 What: /sys/.../events/in_voltageY_supply_roc_rising_period
930 What: /sys/.../events/in_voltageY_supply_roc_falling_period
931 What: /sys/.../events/in_voltageY_thresh_rising_period
932 What: /sys/.../events/in_voltageY_thresh_falling_period
933 What: /sys/.../events/in_voltageY_roc_rising_period
934 What: /sys/.../events/in_voltageY_roc_falling_period
935 What: /sys/.../events/in_tempY_thresh_rising_period
936 What: /sys/.../events/in_tempY_thresh_falling_period
937 What: /sys/.../events/in_tempY_roc_rising_period
938 What: /sys/.../events/in_tempY_roc_falling_period
939 What: /sys/.../events/in_accel_x&y&z_mag_falling_period
940 What: /sys/.../events/in_intensity0_thresh_period
941 What: /sys/.../events/in_proximity0_thresh_period
942 What: /sys/.../events/in_activity_still_thresh_rising_period
943 What: /sys/.../events/in_activity_still_thresh_falling_period
944 What: /sys/.../events/in_activity_walking_thresh_rising_period
945 What: /sys/.../events/in_activity_walking_thresh_falling_period
946 What: /sys/.../events/in_activity_jogging_thresh_rising_period
947 What: /sys/.../events/in_activity_jogging_thresh_falling_period
948 What: /sys/.../events/in_activity_running_thresh_rising_period
949 What: /sys/.../events/in_activity_running_thresh_falling_period
950 KernelVersion: 2.6.37
951 Contact: linux-iio@vger.kernel.org
953 Period of time (in seconds) for which the condition must be
954 met before an event is generated. If direction is not
955 specified then this period applies to both directions.
957 What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
958 What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
959 What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
961 Contact: linux-iio@vger.kernel.org
963 If a low pass filter can be applied to the event generation
964 this property gives its 3db frequency in Hz.
965 A value of zero disables the filter.
967 What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
968 What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
969 What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
971 Contact: linux-iio@vger.kernel.org
973 If a high pass filter can be applied to the event generation
974 this property gives its 3db frequency in Hz.
975 A value of zero disables the filter.
977 What: /sys/.../events/in_activity_still_thresh_rising_en
978 What: /sys/.../events/in_activity_still_thresh_falling_en
979 What: /sys/.../events/in_activity_walking_thresh_rising_en
980 What: /sys/.../events/in_activity_walking_thresh_falling_en
981 What: /sys/.../events/in_activity_jogging_thresh_rising_en
982 What: /sys/.../events/in_activity_jogging_thresh_falling_en
983 What: /sys/.../events/in_activity_running_thresh_rising_en
984 What: /sys/.../events/in_activity_running_thresh_falling_en
986 Contact: linux-iio@vger.kernel.org
988 Enables or disables activitity events. Depending on direction
989 an event is generated when sensor ENTERS or LEAVES a given state.
991 What: /sys/.../events/in_activity_still_thresh_rising_value
992 What: /sys/.../events/in_activity_still_thresh_falling_value
993 What: /sys/.../events/in_activity_walking_thresh_rising_value
994 What: /sys/.../events/in_activity_walking_thresh_falling_value
995 What: /sys/.../events/in_activity_jogging_thresh_rising_value
996 What: /sys/.../events/in_activity_jogging_thresh_falling_value
997 What: /sys/.../events/in_activity_running_thresh_rising_value
998 What: /sys/.../events/in_activity_running_thresh_falling_value
1000 Contact: linux-iio@vger.kernel.org
1002 Confidence value (in units as percentage) to be used
1003 for deciding when an event should be generated. E.g for
1004 running: If the confidence value reported by the sensor
1005 is greater than in_activity_running_thresh_rising_value
1006 then the sensor ENTERS running state. Conversely, if the
1007 confidence value reported by the sensor is lower than
1008 in_activity_running_thresh_falling_value then the sensor
1009 is LEAVING running state.
1011 What: /sys/.../iio:deviceX/events/in_accel_mag_en
1012 What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
1013 What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
1014 What: /sys/.../iio:deviceX/events/in_accel_x_mag_en
1015 What: /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en
1016 What: /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en
1017 What: /sys/.../iio:deviceX/events/in_accel_y_mag_en
1018 What: /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en
1019 What: /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en
1020 What: /sys/.../iio:deviceX/events/in_accel_z_mag_en
1021 What: /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en
1022 What: /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en
1023 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en
1024 What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en
1025 KernelVersion: 2.6.37
1026 Contact: linux-iio@vger.kernel.org
1028 Similar to in_accel_x_thresh[_rising|_falling]_en, but here the
1029 magnitude of the channel is compared to the threshold, not its
1032 What: /sys/.../events/in_accel_raw_mag_value
1033 What: /sys/.../events/in_accel_x_raw_mag_rising_value
1034 What: /sys/.../events/in_accel_y_raw_mag_rising_value
1035 What: /sys/.../events/in_accel_z_raw_mag_rising_value
1036 KernelVersion: 2.6.37
1037 Contact: linux-iio@vger.kernel.org
1039 The value to which the magnitude of the channel is compared. If
1040 number or direction is not specified, applies to all channels of
1043 What: /sys/.../events/in_steps_change_en
1045 Contact: linux-iio@vger.kernel.org
1047 Event generated when channel passes a threshold on the absolute
1048 change in value. E.g. for steps: a step change event is
1049 generated each time the user takes N steps, where N is set using
1050 in_steps_change_value.
1052 What: /sys/.../events/in_steps_change_value
1054 Contact: linux-iio@vger.kernel.org
1056 Specifies the value of change threshold that the
1057 device is comparing against for the events enabled by
1058 <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps:
1059 if set to 3, a step change event will be generated every 3
1062 What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
1063 KernelVersion: 2.6.35
1064 Contact: linux-iio@vger.kernel.org
1066 The name of the trigger source being used, as per string given
1067 in /sys/class/iio/triggerY/name.
1069 What: /sys/bus/iio/devices/iio:deviceX/buffer/length
1070 KernelVersion: 2.6.35
1071 Contact: linux-iio@vger.kernel.org
1073 Number of scans contained by the buffer.
1075 What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
1076 KernelVersion: 2.6.35
1077 Contact: linux-iio@vger.kernel.org
1079 Actually start the buffer capture up. Will start trigger
1080 if first device and appropriate.
1082 What: /sys/bus/iio/devices/iio:deviceX/scan_elements
1083 KernelVersion: 2.6.37
1084 Contact: linux-iio@vger.kernel.org
1086 Directory containing interfaces for elements that will be
1087 captured for a single triggered sample set in the buffer.
1089 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
1090 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
1091 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
1092 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
1093 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
1094 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
1095 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
1096 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
1097 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
1098 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
1099 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
1100 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
1101 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
1102 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
1103 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
1104 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
1105 What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
1106 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
1107 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
1108 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
1109 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
1110 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
1111 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
1112 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
1113 What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
1114 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
1115 What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
1116 KernelVersion: 2.6.37
1117 Contact: linux-iio@vger.kernel.org
1119 Scan element control for triggered data capture.
1121 What: /sys/.../iio:deviceX/scan_elements/in_accel_type
1122 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_type
1123 What: /sys/.../iio:deviceX/scan_elements/in_magn_type
1124 What: /sys/.../iio:deviceX/scan_elements/in_incli_type
1125 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_type
1126 What: /sys/.../iio:deviceX/scan_elements/in_voltage_type
1127 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
1128 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
1129 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
1130 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_type
1131 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_type
1132 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_type
1133 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_type
1134 What: /sys/.../iio:deviceX/scan_elements/in_pressure_type
1135 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
1136 What: /sys/.../iio:deviceX/scan_elements/in_proximity_type
1137 KernelVersion: 2.6.37
1138 Contact: linux-iio@vger.kernel.org
1140 Description of the scan element data storage within the buffer
1141 and hence the form in which it is read from user-space.
1142 Form is [be|le]:[s|u]bits/storagebits[>>shift].
1143 be or le specifies big or little endian. s or u specifies if
1144 signed (2's complement) or unsigned. bits is the number of bits
1145 of data and storagebits is the space (after padding) that it
1146 occupies in the buffer. shift if specified, is the shift that
1147 needs to be applied prior to masking out unused bits. Some
1148 devices put their data in the middle of the transferred elements
1149 with additional information on both sides. Note that some
1150 devices will have additional information in the unused bits
1151 so to get a clean value, the bits value must be used to mask
1152 the buffer output value appropriately. The storagebits value
1153 also specifies the data alignment. So s48/64>>2 will be a
1154 signed 48 bit integer stored in a 64 bit location aligned to
1155 a 64 bit boundary. To obtain the clean value, shift right 2
1156 and apply a mask to zero the top 16 bits of the result.
1157 For other storage combinations this attribute will be extended
1160 What: /sys/.../iio:deviceX/scan_elements/in_accel_type_available
1161 KernelVersion: 2.6.37
1162 Contact: linux-iio@vger.kernel.org
1164 If the type parameter can take one of a small set of values,
1165 this attribute lists them.
1167 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_index
1168 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
1169 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
1170 What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
1171 What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_index
1172 What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_index
1173 What: /sys/.../iio:deviceX/scan_elements/in_accel_x_index
1174 What: /sys/.../iio:deviceX/scan_elements/in_accel_y_index
1175 What: /sys/.../iio:deviceX/scan_elements/in_accel_z_index
1176 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_index
1177 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_index
1178 What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
1179 What: /sys/.../iio:deviceX/scan_elements/in_magn_x_index
1180 What: /sys/.../iio:deviceX/scan_elements/in_magn_y_index
1181 What: /sys/.../iio:deviceX/scan_elements/in_magn_z_index
1182 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_index
1183 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_index
1184 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_index
1185 What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_index
1186 What: /sys/.../iio:deviceX/scan_elements/in_incli_x_index
1187 What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
1188 What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index
1189 What: /sys/.../iio:deviceX/scan_elements/in_pressureY_index
1190 What: /sys/.../iio:deviceX/scan_elements/in_pressure_index
1191 What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
1192 What: /sys/.../iio:deviceX/scan_elements/in_proximity_index
1193 KernelVersion: 2.6.37
1194 Contact: linux-iio@vger.kernel.org
1196 A single positive integer specifying the position of this
1197 scan element in the buffer. Note these are not dependent on
1198 what is enabled and may not be contiguous. Thus for user-space
1199 to establish the full layout these must be used in conjunction
1200 with all _en attributes to establish which channels are present,
1201 and the relevant _type attributes to establish the data storage
1204 What: /sys/.../iio:deviceX/in_activity_still_input
1205 What: /sys/.../iio:deviceX/in_activity_walking_input
1206 What: /sys/.../iio:deviceX/in_activity_jogging_input
1207 What: /sys/.../iio:deviceX/in_activity_running_input
1209 Contact: linux-iio@vger.kernel.org
1211 This attribute is used to read the confidence for an activity
1212 expressed in units as percentage.
1214 What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
1215 KernelVersion: 2.6.38
1216 Contact: linux-iio@vger.kernel.org
1218 This attribute is used to read the amount of quadrature error
1219 present in the device at a given time.
1221 What: /sys/.../iio:deviceX/in_accelX_power_mode
1223 Contact: linux-iio@vger.kernel.org
1225 Specifies the chip power mode.
1226 low_noise: reduce noise level from ADC,
1227 low_power: enable low current consumption.
1228 For a list of available output power modes read
1229 in_accel_power_mode_available.
1231 What: /sys/.../iio:deviceX/in_energy_input
1232 What: /sys/.../iio:deviceX/in_energy_raw
1234 Contact: linux-iio@vger.kernel.org
1236 This attribute is used to read the energy value reported by the
1237 device (e.g.: human activity sensors report energy burnt by the
1238 user). Units after application of scale are Joules.
1240 What: /sys/.../iio:deviceX/in_distance_input
1241 What: /sys/.../iio:deviceX/in_distance_raw
1243 Contact: linux-iio@vger.kernel.org
1245 This attribute is used to read the distance covered by the user
1246 since the last reboot while activated. Units after application
1247 of scale are meters.
1249 What: /sys/bus/iio/devices/iio:deviceX/store_eeprom
1250 KernelVersion: 3.4.0
1251 Contact: linux-iio@vger.kernel.org
1253 Writing '1' stores the current device configuration into
1254 on-chip EEPROM. After power-up or chip reset the device will
1255 automatically load the saved configuration.
1257 What: /sys/.../iio:deviceX/in_proximity_raw
1258 What: /sys/.../iio:deviceX/in_proximity_input
1259 What: /sys/.../iio:deviceX/in_proximityY_raw
1261 Contact: linux-iio@vger.kernel.org
1263 Proximity measurement indicating that some
1264 object is near the sensor, usually by observing
1265 reflectivity of infrared or ultrasound emitted.
1266 Often these sensors are unit less and as such conversion
1267 to SI units is not possible. Higher proximity measurements
1268 indicate closer objects, and vice versa. Units after
1269 application of scale and offset are meters.
1271 What: /sys/.../iio:deviceX/in_illuminance_input
1272 What: /sys/.../iio:deviceX/in_illuminance_raw
1273 What: /sys/.../iio:deviceX/in_illuminanceY_input
1274 What: /sys/.../iio:deviceX/in_illuminanceY_raw
1275 What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw
1276 What: /sys/.../iio:deviceX/in_illuminance_ir_raw
1277 What: /sys/.../iio:deviceX/in_illuminance_clear_raw
1279 Contact: linux-iio@vger.kernel.org
1281 Illuminance measurement, units after application of scale
1284 What: /sys/.../iio:deviceX/in_intensityY_raw
1285 What: /sys/.../iio:deviceX/in_intensityY_ir_raw
1286 What: /sys/.../iio:deviceX/in_intensityY_both_raw
1287 What: /sys/.../iio:deviceX/in_intensityY_uv_raw
1289 Contact: linux-iio@vger.kernel.org
1291 Unit-less light intensity. Modifiers both and ir indicate
1292 that measurements contains visible and infrared light
1293 components or just infrared light, respectively. Modifier uv indicates
1294 that measurements contain ultraviolet light components.
1296 What: /sys/.../iio:deviceX/in_uvindex_input
1298 Contact: linux-iio@vger.kernel.org
1300 UV light intensity index measuring the human skin's response to
1301 different wavelength of sunlight weighted according to the
1302 standardised CIE Erythemal Action Spectrum. UV index values range
1303 from 0 (low) to >=11 (extreme).
1305 What: /sys/.../iio:deviceX/in_intensity_red_integration_time
1306 What: /sys/.../iio:deviceX/in_intensity_green_integration_time
1307 What: /sys/.../iio:deviceX/in_intensity_blue_integration_time
1308 What: /sys/.../iio:deviceX/in_intensity_clear_integration_time
1309 What: /sys/.../iio:deviceX/in_illuminance_integration_time
1311 Contact: linux-iio@vger.kernel.org
1313 This attribute is used to get/set the integration time in
1316 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
1318 Contact: linux-iio@vger.kernel.org
1320 Number of seconds in which to compute speed.
1322 What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
1324 Contact: linux-iio@vger.kernel.org
1326 Raw value of quaternion components using a format
1327 x y z w. Here x, y, and z component represents the axis about
1328 which a rotation will occur and w component represents the
1331 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_raw
1332 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_raw
1333 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_raw
1334 What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_raw
1336 Contact: linux-iio@vger.kernel.org
1338 Raw value of rotation from true/magnetic north measured with
1339 or without compensation from tilt sensors.
1341 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_raw
1342 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw
1343 What: /sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw
1345 Contact: linux-iio@vger.kernel.org
1347 Raw current measurement from channel X. Units are in milliamps
1348 after application of scale and offset. If no offset or scale is
1349 present, output should be considered as processed with the
1352 Channels with 'i' and 'q' modifiers always exist in pairs and both
1353 channels refer to the same signal. The 'i' channel contains the in-phase
1354 component of the signal while the 'q' channel contains the quadrature
1357 What: /sys/.../iio:deviceX/in_energy_en
1358 What: /sys/.../iio:deviceX/in_distance_en
1359 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
1360 What: /sys/.../iio:deviceX/in_steps_en
1362 Contact: linux-iio@vger.kernel.org
1364 Activates a device feature that runs in firmware/hardware.
1365 E.g. for steps: the pedometer saves power while not used;
1366 when activated, it will count the steps taken by the user in
1367 firmware and export them through in_steps_input.
1369 What: /sys/.../iio:deviceX/in_steps_input
1371 Contact: linux-iio@vger.kernel.org
1373 This attribute is used to read the number of steps taken by the user
1374 since the last reboot while activated.
1376 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input
1377 What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw
1379 Contact: linux-iio@vger.kernel.org
1381 This attribute is used to read the current speed value of the
1382 user (which is the norm or magnitude of the velocity vector).
1383 Units after application of scale are m/s.
1385 What: /sys/.../iio:deviceX/in_steps_debounce_count
1387 Contact: linux-iio@vger.kernel.org
1389 Specifies the number of steps that must occur within
1390 in_steps_filter_debounce_time for the pedometer to decide the
1391 consumer is making steps.
1393 What: /sys/.../iio:deviceX/in_steps_debounce_time
1395 Contact: linux-iio@vger.kernel.org
1397 Specifies number of seconds in which we compute the steps
1398 that occur in order to decide if the consumer is making steps.
1400 What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
1402 Contact: linux-iio@vger.kernel.org
1404 A single positive integer specifying the maximum number of scan
1405 elements to wait for.
1406 Poll will block until the watermark is reached.
1407 Blocking read will wait until the minimum between the requested
1408 read amount or the low water mark is available.
1409 Non-blocking read will retrieve the available samples from the
1410 buffer even if there are less samples then watermark level. This
1411 allows the application to block on poll with a timeout and read
1412 the available samples after the timeout expires and thus have a
1413 maximum delay guarantee.
1415 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled
1417 Contact: linux-iio@vger.kernel.org
1419 A read-only boolean value that indicates if the hardware fifo is
1420 currently enabled or disabled. If the device does not have a
1421 hardware fifo this entry is not present.
1422 The hardware fifo is enabled when the buffer is enabled if the
1423 current hardware fifo watermark level is set and other current
1424 device settings allows it (e.g. if a trigger is set that samples
1425 data differently that the hardware fifo does then hardware fifo
1427 If the hardware fifo is enabled and the level of the hardware
1428 fifo reaches the hardware fifo watermark level the device will
1429 flush its hardware fifo to the device buffer. Doing a non
1430 blocking read on the device when no samples are present in the
1431 device buffer will also force a flush.
1432 When the hardware fifo is enabled there is no need to use a
1433 trigger to use buffer mode since the watermark settings
1434 guarantees that the hardware fifo is flushed to the device
1437 What: /sys/bus/iio/devices/iio:device*/buffer/hwfifo_timeout
1439 Contact: linux-iio@vger.kernel.org
1441 A read/write property to provide capability to delay reporting of
1442 samples till a timeout is reached. This allows host processors to
1443 sleep, while the sensor is storing samples in its internal fifo.
1444 The maximum timeout in seconds can be specified by setting
1445 hwfifo_timeout.The current delay can be read by reading
1446 hwfifo_timeout. A value of 0 means that there is no timeout.
1448 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
1450 Contact: linux-iio@vger.kernel.org
1452 Read-only entry that contains a single integer specifying the
1453 current watermark level for the hardware fifo. If the device
1454 does not have a hardware fifo this entry is not present.
1455 The watermark level for the hardware fifo is set by the driver
1456 based on the value set by the user in buffer/watermark but
1457 taking into account hardware limitations (e.g. most hardware
1458 buffers are limited to 32-64 samples, some hardware buffers
1459 watermarks are fixed or have minimum levels). A value of 0
1460 means that the hardware watermark is unset.
1462 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min
1464 Contact: linux-iio@vger.kernel.org
1466 A single positive integer specifying the minimum watermark level
1467 for the hardware fifo of this device. If the device does not
1468 have a hardware fifo this entry is not present.
1469 If the user sets buffer/watermark to a value less than this one,
1470 then the hardware watermark will remain unset.
1472 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max
1474 Contact: linux-iio@vger.kernel.org
1476 A single positive integer specifying the maximum watermark level
1477 for the hardware fifo of this device. If the device does not
1478 have a hardware fifo this entry is not present.
1479 If the user sets buffer/watermark to a value greater than this
1480 one, then the hardware watermark will be capped at this value.
1482 What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available
1484 Contact: linux-iio@vger.kernel.org
1486 A list of positive integers specifying the available watermark
1487 levels for the hardware fifo. This entry is optional and if it
1488 is not present it means that all the values between
1489 hwfifo_watermark_min and hwfifo_watermark_max are supported.
1490 If the user sets buffer/watermark to a value greater than
1491 hwfifo_watermak_min but not equal to any of the values in this
1492 list, the driver will chose an appropriate value for the
1493 hardware fifo watermark level.
1495 What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity
1496 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity
1497 What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity
1498 What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity
1500 Contact: linux-iio@vger.kernel.org
1502 The emissivity ratio of the surface in the field of view of the
1503 contactless temperature sensor. Emissivity varies from 0 to 1,
1504 with 1 being the emissivity of a black body.
1506 What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio
1507 What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio
1508 What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio
1510 Contact: linux-iio@vger.kernel.org
1512 Hardware applied number of measurements for acquiring one
1513 data point. The HW will do <type>[_name]_oversampling_ratio
1514 measurements and return the average value as output data. Each
1515 value resulted from <type>[_name]_oversampling_ratio measurements
1516 is considered as one sample for <type>[_name]_sampling_frequency.
1518 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw
1519 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw
1520 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw
1521 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw
1522 What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw
1523 What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw
1525 Contact: linux-iio@vger.kernel.org
1527 Raw (unscaled no offset etc.) percentage reading of a substance.
1529 What: /sys/bus/iio/devices/iio:deviceX/in_resistance_raw
1530 What: /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw
1531 What: /sys/bus/iio/devices/iio:deviceX/out_resistance_raw
1532 What: /sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
1534 Contact: linux-iio@vger.kernel.org
1536 Raw (unscaled no offset etc.) resistance reading that can be processed
1539 What: /sys/bus/iio/devices/iio:deviceX/heater_enable
1540 KernelVersion: 4.1.0
1541 Contact: linux-iio@vger.kernel.org
1543 '1' (enable) or '0' (disable) specifying the enable
1544 of heater function. Same reading values apply
1545 This ABI is especially applicable for humidity sensors
1546 to heatup the device and get rid of any condensation
1547 in some humidity environment
1549 What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
1551 Contact: linux-iio@vger.kernel.org
1553 Raw (unscaled no offset etc.) pH reading of a substance as a negative
1554 base-10 logarithm of hydrodium ions in a litre of water.
1556 What: /sys/bus/iio/devices/iio:deviceX/mount_matrix
1557 What: /sys/bus/iio/devices/iio:deviceX/in_mount_matrix
1558 What: /sys/bus/iio/devices/iio:deviceX/out_mount_matrix
1559 What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_mount_matrix
1560 What: /sys/bus/iio/devices/iio:deviceX/in_accel_mount_matrix
1562 Contact: linux-iio@vger.kernel.org
1564 Mounting matrix for IIO sensors. This is a rotation matrix which
1565 informs userspace about sensor chip's placement relative to the
1566 main hardware it is mounted on.
1567 Main hardware placement is defined according to the local
1568 reference frame related to the physical quantity the sensor
1570 Given that the rotation matrix is defined in a board specific
1571 way (platform data and / or device-tree), the main hardware
1572 reference frame definition is left to the implementor's choice
1573 (see below for a magnetometer example).
1574 Applications should apply this rotation matrix to samples so
1575 that when main hardware reference frame is aligned onto local
1576 reference frame, then sensor chip reference frame is also
1577 perfectly aligned with it.
1578 Matrix is a 3x3 unitary matrix and typically looks like
1579 [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
1580 [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
1581 are perfectly aligned with each other.
1583 For example, a mounting matrix for a magnetometer sensor informs
1584 userspace about sensor chip's ORIENTATION relative to the main
1586 More specifically, main hardware orientation is defined with
1587 respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
1588 * Y is in the ground plane and positive towards magnetic North ;
1589 * X is in the ground plane, perpendicular to the North axis and
1590 positive towards the East ;
1591 * Z is perpendicular to the ground plane and positive upwards.
1593 An implementor might consider that for a hand-held device, a
1594 'natural' orientation would be 'front facing camera at the top'.
1595 The main hardware reference frame could then be described as :
1596 * Y is in the plane of the screen and is positive towards the
1598 * X is in the plane of the screen, perpendicular to Y axis, and
1599 positive towards the right hand side of the screen ;
1600 * Z is perpendicular to the screen plane and positive out of the
1602 Another example for a quadrotor UAV might be :
1603 * Y is in the plane of the propellers and positive towards the
1605 * X is in the plane of the propellers, perpendicular to Y axis,
1606 and positive towards the starboard side of the UAV ;
1607 * Z is perpendicular to propellers plane and positive upwards.
1609 What: /sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
1611 Contact: linux-iio@vger.kernel.org
1613 Raw (unscaled no offset etc.) electric conductivity reading that
1614 can be processed to siemens per meter.
1616 What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw
1618 Contact: linux-iio@vger.kernel.org
1620 Raw counter device counts from channel Y. For quadrature
1621 counters, multiplication by an available [Y]_scale results in
1622 the counts of a single quadrature signal phase from channel Y.
1624 What: /sys/bus/iio/devices/iio:deviceX/in_indexY_raw
1626 Contact: linux-iio@vger.kernel.org
1628 Raw counter device index value from channel Y. This attribute
1629 provides an absolute positional reference (e.g. a pulse once per
1630 revolution) which may be used to home positional systems as
1633 What: /sys/bus/iio/devices/iio:deviceX/in_count_count_direction_available
1635 Contact: linux-iio@vger.kernel.org
1637 A list of possible counting directions which are:
1638 - "up" : counter device is increasing.
1639 - "down": counter device is decreasing.
1641 What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_direction
1643 Contact: linux-iio@vger.kernel.org
1645 Raw counter device counters direction for channel Y.
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