1What: /sys/bus/iio/devices/iio:deviceX 2KernelVersion: 2.6.35 3Contact: linux-iio@vger.kernel.org 4Description: 5 Hardware chip or device accessed by one communication port. 6 Corresponds to a grouping of sensor channels. X is the IIO 7 index of the device. 8 9What: /sys/bus/iio/devices/triggerX 10KernelVersion: 2.6.35 11Contact: linux-iio@vger.kernel.org 12Description: 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 19 Contains trigger type specific elements. These do not 20 generalize well and hence are not documented in this file. 21 X is the IIO index of the trigger. 22 23What: /sys/bus/iio/devices/iio:deviceX/buffer 24KernelVersion: 2.6.35 25Contact: linux-iio@vger.kernel.org 26Description: 27 Directory of attributes relating to the buffer for the device. 28 29What: /sys/bus/iio/devices/iio:deviceX/name 30KernelVersion: 2.6.35 31Contact: linux-iio@vger.kernel.org 32Description: 33 Description of the physical chip / device for device X. 34 Typically a part number. 35 36What: /sys/bus/iio/devices/iio:deviceX/label 37KernelVersion: 5.8 38Contact: linux-iio@vger.kernel.org 39Description: 40 Optional symbolic label for a device. 41 This is useful for userspace to be able to better identify an 42 individual device. 43 44 The contents of the label are free-form, but there are some 45 standardized uses: 46 47 For proximity sensors which give the proximity (of a person) to 48 a certain wlan or wwan antenna the following standardized labels 49 are used: 50 51 * "proximity-wifi" 52 * "proximity-lte" 53 * "proximity-wifi-lte" 54 * "proximity-wifi-left" 55 * "proximity-wifi-right" 56 57 These are used to indicate to userspace that these proximity 58 sensors may be used to tune transmit power to ensure that 59 Specific Absorption Rate (SAR) limits are honored. 60 The "-left" and "-right" labels are for devices with multiple 61 antennas. 62 63 In some laptops/tablets the standardized proximity sensor labels 64 instead indicate proximity to a specific part of the device: 65 66 * "proximity-palmrest" indicates proximity to the keyboard's palmrest 67 * "proximity-palmrest-left" indicates proximity to the left part of the palmrest 68 * "proximity-palmrest-right" indicates proximity to the right part of the palmrest 69 * "proximity-lap" indicates the device is being used on someone's lap 70 71 Note "proximity-lap" is special in that its value may be 72 calculated by firmware from other sensor readings, rather then 73 being a raw sensor reading. 74 75 For accelerometers used in 2-in-1s with 360° (yoga-style) hinges, 76 which have an accelerometer in both their base and their display, 77 the following standardized labels are used: 78 79 * "accel-base" 80 * "accel-display" 81 82 For devices where an accelerometer is housed in the swivel camera subassembly 83 (for AR application), the following standardized label is used: 84 85 * "accel-camera" 86 87What: /sys/bus/iio/devices/iio:deviceX/current_timestamp_clock 88KernelVersion: 4.5 89Contact: linux-iio@vger.kernel.org 90Description: 91 String identifying current posix clock used to timestamp 92 buffered samples and events for device X. 93 94What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency 95What: /sys/bus/iio/devices/iio:deviceX/in_intensity_sampling_frequency 96What: /sys/bus/iio/devices/iio:deviceX/buffer/sampling_frequency 97What: /sys/bus/iio/devices/triggerX/sampling_frequency 98KernelVersion: 2.6.35 99Contact: linux-iio@vger.kernel.org 100Description: 101 Some devices have internal clocks. This parameter sets the 102 resulting sampling frequency. In many devices this 103 parameter has an effect on input filters etc. rather than 104 simply controlling when the input is sampled. As this 105 affects data ready triggers, hardware buffers and the sysfs 106 direct access interfaces, it may be found in any of the 107 relevant directories. If it affects all of the above 108 then it is to be found in the base device directory. 109 110 The stm32-timer-trigger has the additional characteristic that 111 a sampling_frequency of 0 is defined to stop sampling. 112 113What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available 114What: /sys/bus/iio/devices/iio:deviceX/in_intensity_sampling_frequency_available 115What: /sys/bus/iio/devices/iio:deviceX/in_proximity_sampling_frequency_available 116What: /sys/.../iio:deviceX/buffer/sampling_frequency_available 117What: /sys/bus/iio/devices/triggerX/sampling_frequency_available 118KernelVersion: 2.6.35 119Contact: linux-iio@vger.kernel.org 120Description: 121 When the internal sampling clock can only take a specific set of 122 frequencies, we can specify the available values with: 123 124 - a small discrete set of values like "0 2 4 6 8" 125 - a range with minimum, step and maximum frequencies like 126 "[min step max]" 127 128What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio 129KernelVersion: 2.6.38 130Contact: linux-iio@vger.kernel.org 131Description: 132 Hardware dependent ADC oversampling. Controls the sampling ratio 133 of the digital filter if available. 134 135What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio_available 136KernelVersion: 2.6.38 137Contact: linux-iio@vger.kernel.org 138Description: 139 Hardware dependent values supported by the oversampling filter. 140 141What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw 142What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw 143What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw 144What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw 145KernelVersion: 2.6.35 146Contact: linux-iio@vger.kernel.org 147Description: 148 Raw (unscaled no bias removal etc.) voltage measurement from 149 channel Y. In special cases where the channel does not 150 correspond to externally available input one of the named 151 versions may be used. The number must always be specified and 152 unique to allow association with event codes. Units after 153 application of scale and offset are millivolts. 154 155 Channels with 'i' and 'q' modifiers always exist in pairs and both 156 channels refer to the same signal. The 'i' channel contains the in-phase 157 component of the signal while the 'q' channel contains the quadrature 158 component. 159 160What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw 161KernelVersion: 2.6.35 162Contact: linux-iio@vger.kernel.org 163Description: 164 Raw (unscaled) differential voltage measurement equivalent to 165 channel Y - channel Z where these channel numbers apply to the 166 physically equivalent inputs when non differential readings are 167 separately available. In differential only parts, then all that 168 is required is a consistent labeling. Units after application 169 of scale and offset are millivolts. 170 171What: /sys/bus/iio/devices/iio:deviceX/in_currentY_raw 172What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_raw 173KernelVersion: 3.17 174Contact: linux-iio@vger.kernel.org 175Description: 176 Raw (unscaled no bias removal etc.) current measurement from 177 channel Y. In special cases where the channel does not 178 correspond to externally available input one of the named 179 versions may be used. The number must always be specified and 180 unique to allow association with event codes. Units after 181 application of scale and offset are milliamps. 182 183What: /sys/bus/iio/devices/iio:deviceX/in_powerY_raw 184KernelVersion: 4.5 185Contact: linux-iio@vger.kernel.org 186Description: 187 Raw (unscaled no bias removal etc.) power measurement from 188 channel Y. The number must always be specified and 189 unique to allow association with event codes. Units after 190 application of scale and offset are milliwatts. 191 192What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw 193KernelVersion: 3.2 194Contact: linux-iio@vger.kernel.org 195Description: 196 Raw capacitance measurement from channel Y. Units after 197 application of scale and offset are nanofarads. 198 199What: /sys/.../iio:deviceX/in_capacitanceY-in_capacitanceZ_raw 200KernelVersion: 3.2 201Contact: linux-iio@vger.kernel.org 202Description: 203 Raw differential capacitance measurement equivalent to 204 channel Y - channel Z where these channel numbers apply to the 205 physically equivalent inputs when non differential readings are 206 separately available. In differential only parts, then all that 207 is required is a consistent labeling. Units after application 208 of scale and offset are nanofarads. 209 210What: /sys/bus/iio/devices/iio:deviceX/in_temp_raw 211What: /sys/bus/iio/devices/iio:deviceX/in_tempX_raw 212What: /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw 213What: /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw 214What: /sys/bus/iio/devices/iio:deviceX/in_temp_ambient_raw 215What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_raw 216KernelVersion: 2.6.35 217Contact: linux-iio@vger.kernel.org 218Description: 219 Raw (unscaled no bias removal etc.) temperature measurement. 220 If an axis is specified it generally means that the temperature 221 sensor is associated with one part of a compound device (e.g. 222 a gyroscope axis). The ambient and object modifiers distinguish 223 between ambient (reference) and distant temperature for contact- 224 less measurements. Units after application of scale and offset 225 are milli degrees Celsius. 226 227What: /sys/bus/iio/devices/iio:deviceX/in_tempX_input 228KernelVersion: 2.6.38 229Contact: linux-iio@vger.kernel.org 230Description: 231 Scaled temperature measurement in milli degrees Celsius. 232 233What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw 234What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw 235What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw 236KernelVersion: 2.6.35 237Contact: linux-iio@vger.kernel.org 238Description: 239 Acceleration in direction x, y or z (may be arbitrarily assigned 240 but should match other such assignments on device). 241 Has all of the equivalent parameters as per voltageY. Units 242 after application of scale and offset are m/s^2. 243 244What: /sys/bus/iio/devices/iio:deviceX/in_gravity_x_raw 245What: /sys/bus/iio/devices/iio:deviceX/in_gravity_y_raw 246What: /sys/bus/iio/devices/iio:deviceX/in_gravity_z_raw 247KernelVersion: 4.11 248Contact: linux-iio@vger.kernel.org 249Description: 250 Gravity in direction x, y or z (may be arbitrarily assigned 251 but should match other such assignments on device). 252 Units after application of scale and offset are m/s^2. 253 254What: /sys/bus/iio/devices/iio:deviceX/in_angl_raw 255What: /sys/bus/iio/devices/iio:deviceX/in_anglY_raw 256KernelVersion: 4.17 257Contact: linux-iio@vger.kernel.org 258Description: 259 Angle of rotation. Units after application of scale and offset 260 are radians. 261 262What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_x_raw 263What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_y_raw 264KernelVersion: 4.19 265Contact: linux-iio@vger.kernel.org 266Description: 267 Relative position in direction x or y on a pad (may be 268 arbitrarily assigned but should match other such assignments on 269 device). 270 Units after application of scale and offset are milli percents 271 from the pad's size in both directions. Should be calibrated by 272 the consumer. 273 274What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw 275What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw 276What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw 277KernelVersion: 2.6.35 278Contact: linux-iio@vger.kernel.org 279Description: 280 Angular velocity about axis x, y or z (may be arbitrarily 281 assigned). Has all the equivalent parameters as per voltageY. 282 Units after application of scale and offset are radians per 283 second. 284 285What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw 286What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw 287What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw 288KernelVersion: 2.6.35 289Contact: linux-iio@vger.kernel.org 290Description: 291 Inclination raw reading about axis x, y or z (may be 292 arbitrarily assigned). Data converted by application of offset 293 and scale to degrees. 294 295What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw 296What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw 297What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw 298KernelVersion: 2.6.35 299Contact: linux-iio@vger.kernel.org 300Description: 301 Magnetic field along axis x, y or z (may be arbitrarily 302 assigned). Data converted by application of offset 303 then scale to Gauss. 304 305What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw 306What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw 307What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw 308KernelVersion: 2.6.36 309Contact: linux-iio@vger.kernel.org 310Description: 311 Highest value since some reset condition. These 312 attributes allow access to this and are otherwise 313 the direct equivalent of the <type>Y[_name]_raw attributes. 314 315What: /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw 316KernelVersion: 2.6.36 317Contact: linux-iio@vger.kernel.org 318Description: 319 A computed peak value based on the sum squared magnitude of 320 the underlying value in the specified directions. 321 322What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw 323What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw 324KernelVersion: 3.8 325Contact: linux-iio@vger.kernel.org 326Description: 327 Raw pressure measurement from channel Y. Units after 328 application of scale and offset are kilopascal. 329 330What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_input 331What: /sys/bus/iio/devices/iio:deviceX/in_pressure_input 332KernelVersion: 3.8 333Contact: linux-iio@vger.kernel.org 334Description: 335 Scaled pressure measurement from channel Y, in kilopascal. 336 337What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw 338KernelVersion: 3.14 339Contact: linux-iio@vger.kernel.org 340Description: 341 Raw humidity measurement of air. Units after application of 342 scale and offset are milli percent. 343 344What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input 345KernelVersion: 3.14 346Contact: linux-iio@vger.kernel.org 347Description: 348 Scaled humidity measurement in milli percent. 349 350What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw 351KernelVersion: 3.5 352Contact: linux-iio@vger.kernel.org 353Description: 354 Averaged raw measurement from channel X. The number of values 355 used for averaging is device specific. The converting rules for 356 normal raw values also applies to the averaged raw values. 357 358What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset 359What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset 360What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset 361What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset 362What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset 363What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset 364What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset 365What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset 366What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset 367What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset 368What: /sys/bus/iio/devices/iio:deviceX/in_currentY_offset 369What: /sys/bus/iio/devices/iio:deviceX/in_current_offset 370What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset 371What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset 372What: /sys/bus/iio/devices/iio:deviceX/in_current_q_offset 373What: /sys/bus/iio/devices/iio:deviceX/in_current_i_offset 374What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset 375What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset 376What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset 377What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset 378What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset 379What: /sys/bus/iio/devices/iio:deviceX/in_magn_offset 380What: /sys/bus/iio/devices/iio:deviceX/in_rot_offset 381What: /sys/bus/iio/devices/iio:deviceX/in_angl_offset 382What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceX_offset 383KernelVersion: 2.6.35 384Contact: linux-iio@vger.kernel.org 385Description: 386 If known for a device, offset to be added to <type>[Y]_raw prior 387 to scaling by <type>[Y]_scale in order to obtain value in the 388 <type> units as specified in <type>[Y]_raw documentation. 389 Not present if the offset is always 0 or unknown. If Y or 390 axis <x|y|z> is not present, then the offset applies to all 391 in channels of <type>. 392 May be writable if a variable offset can be applied on the 393 device. Note that this is different to calibbias which 394 is for devices (or drivers) that apply offsets to compensate 395 for variation between different instances of the part, typically 396 adjusted by using some hardware supported calibration procedure. 397 Calibbias is applied internally, offset is applied in userspace 398 to the _raw output. 399 400What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale 401What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale 402What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale 403What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale 404What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale 405What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale 406What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale 407What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale 408What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale 409What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale 410What: /sys/bus/iio/devices/iio:deviceX/in_currentY_scale 411What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale 412What: /sys/bus/iio/devices/iio:deviceX/in_current_scale 413What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale 414What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale 415What: /sys/bus/iio/devices/iio:deviceX/in_current_i_scale 416What: /sys/bus/iio/devices/iio:deviceX/in_current_q_scale 417What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale 418What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale 419What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale 420What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale 421What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale 422What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale 423What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale 424What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale 425What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale 426What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_scale 427What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_scale 428What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_scale 429What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale 430What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale 431What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale 432What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale 433What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale 434What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale 435What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale 436What: /sys/bus/iio/devices/iio:deviceX/in_angl_scale 437What: /sys/bus/iio/devices/iio:deviceX/in_intensity_x_scale 438What: /sys/bus/iio/devices/iio:deviceX/in_intensity_y_scale 439What: /sys/bus/iio/devices/iio:deviceX/in_intensity_z_scale 440What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_scale 441KernelVersion: 2.6.35 442Contact: linux-iio@vger.kernel.org 443Description: 444 If known for a device, scale to be applied to <type>Y[_name]_raw 445 post addition of <type>[Y][_name]_offset in order to obtain the 446 measured value in <type> units as specified in 447 <type>[Y][_name]_raw documentation. If shared across all in 448 channels then Y and <x|y|z> are not present and the value is 449 called <type>[Y][_name]_scale. The peak modifier means this 450 value is applied to <type>Y[_name]_peak_raw values. 451 452What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias 453What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias 454What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias 455What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias 456What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias 457What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias 458What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias 459What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias 460What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias 461What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias 462KernelVersion: 2.6.35 463Contact: linux-iio@vger.kernel.org 464Description: 465 Hardware applied calibration offset (assumed to fix production 466 inaccuracies). 467 icm42600: For this device values are real physical offsets 468 expressed in SI units (m/s^2 for accelerometers and rad/s 469 for gyroscope)/ 470 471What: /sys/bus/iio/devices/iio:deviceX/in_accel_calibbias_available 472What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_calibbias_available 473KernelVersion: 5.8 474Contact: linux-iio@vger.kernel.org 475Description: 476 Available values of calibbias. Maybe expressed as either of: 477 478 - a small discrete set of values like "0 2 4 6 8" 479 - a range specified as "[min step max]" 480 481What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale 482What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale 483What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale 484What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale 485What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale 486What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale 487What: /sys/bus/iio/devices/iio:deviceX/in_altvoltage_calibscale 488What: /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale 489What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale 490What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale 491What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale 492What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale 493What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale 494What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale 495What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale 496What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale 497What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale 498What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale 499What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale 500KernelVersion: 2.6.35 501Contact: linux-iio@vger.kernel.org 502Description: 503 Hardware applied calibration scale factor (assumed to fix 504 production inaccuracies). If shared across all channels, 505 <type>_calibscale is used. 506 507What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender 508What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender 509What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender 510What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender 511KernelVersion: 4.0 512Contact: linux-iio@vger.kernel.org 513Description: 514 Gender of the user (e.g.: male, female) used by some pedometers 515 to compute the stride length, distance, speed and activity 516 type. 517 518What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available 519What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available 520What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available 521What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available 522KernelVersion: 4.0 523Contact: linux-iio@vger.kernel.org 524Description: 525 Lists all available gender values (e.g.: male, female). 526 527What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight 528What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight 529What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight 530What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight 531KernelVersion: 3.19 532Contact: linux-iio@vger.kernel.org 533Description: 534 Height of the user (in meters) used by some pedometers 535 to compute the stride length, distance, speed and activity 536 type. 537 538What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight 539KernelVersion: 4.0 540Contact: linux-iio@vger.kernel.org 541Description: 542 Weight of the user (in kg). It is needed by some pedometers 543 to compute the calories burnt by the user. 544 545What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available 546What: /sys/.../iio:deviceX/in_anglvel_scale_available 547What: /sys/.../iio:deviceX/in_magn_scale_available 548What: /sys/.../iio:deviceX/in_illuminance_scale_available 549What: /sys/.../iio:deviceX/in_intensity_scale_available 550What: /sys/.../iio:deviceX/in_proximity_scale_available 551What: /sys/.../iio:deviceX/in_voltageX_scale_available 552What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available 553What: /sys/.../iio:deviceX/out_voltageX_scale_available 554What: /sys/.../iio:deviceX/out_altvoltageX_scale_available 555What: /sys/.../iio:deviceX/in_capacitance_scale_available 556What: /sys/.../iio:deviceX/in_pressure_scale_available 557What: /sys/.../iio:deviceX/in_pressureY_scale_available 558KernelVersion: 2.6.35 559Contact: linux-iio@vger.kernel.org 560Description: 561 If a discrete set of scale values is available, they 562 are listed in this attribute. 563 564What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain 565What: /sys/bus/iio/devices/iio:deviceX/in_intensity_hardwaregain 566What: /sys/bus/iio/devices/iio:deviceX/in_intensity_red_hardwaregain 567What: /sys/bus/iio/devices/iio:deviceX/in_intensity_green_hardwaregain 568What: /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_hardwaregain 569What: /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_hardwaregain 570KernelVersion: 2.6.35 571Contact: linux-iio@vger.kernel.org 572Description: 573 Hardware applied gain factor. If shared across all channels, 574 <type>_hardwaregain is used. 575 576What: /sys/bus/iio/devices/iio:deviceX/in_intensity_hardwaregain_available 577KernelVersion: 5.10 578Contact: linux-iio@vger.kernel.org 579Description: 580 Lists all available hardware applied gain factors. Shared across all 581 channels. 582 583What: /sys/.../in_accel_filter_low_pass_3db_frequency 584What: /sys/.../in_magn_filter_low_pass_3db_frequency 585What: /sys/.../in_anglvel_filter_low_pass_3db_frequency 586KernelVersion: 3.2 587Contact: linux-iio@vger.kernel.org 588Description: 589 If a known or controllable low pass filter is applied 590 to the underlying data channel, then this parameter 591 gives the 3dB frequency of the filter in Hz. 592 593What: /sys/.../in_accel_filter_high_pass_3db_frequency 594What: /sys/.../in_anglvel_filter_high_pass_3db_frequency 595What: /sys/.../in_magn_filter_high_pass_3db_frequency 596KernelVersion: 4.2 597Contact: linux-iio@vger.kernel.org 598Description: 599 If a known or controllable high pass filter is applied 600 to the underlying data channel, then this parameter 601 gives the 3dB frequency of the filter in Hz. 602 603What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw 604What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw 605KernelVersion: 2.6.37 606Contact: linux-iio@vger.kernel.org 607Description: 608 Raw (unscaled, no bias etc.) output voltage for 609 channel Y. The number must always be specified and 610 unique if the output corresponds to a single channel. 611 While DAC like devices typically use out_voltage, 612 a continuous frequency generating device, such as 613 a DDS or PLL should use out_altvoltage. 614 615What: /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw 616What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw 617KernelVersion: 2.6.37 618Contact: linux-iio@vger.kernel.org 619Description: 620 Raw (unscaled, no bias etc.) output voltage for an aggregate of 621 channel Y, channel Z, etc. This interface is available in cases 622 where a single output sets the value for multiple channels 623 simultaneously. 624 625What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode 626What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode 627What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode 628What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode 629KernelVersion: 2.6.38 630Contact: linux-iio@vger.kernel.org 631Description: 632 Specifies the output powerdown mode. 633 DAC output stage is disconnected from the amplifier and 634 1kohm_to_gnd: connected to ground via an 1kOhm resistor, 635 2.5kohm_to_gnd: connected to ground via a 2.5kOhm resistor, 636 6kohm_to_gnd: connected to ground via a 6kOhm resistor, 637 20kohm_to_gnd: connected to ground via a 20kOhm resistor, 638 90kohm_to_gnd: connected to ground via a 90kOhm resistor, 639 100kohm_to_gnd: connected to ground via an 100kOhm resistor, 640 125kohm_to_gnd: connected to ground via an 125kOhm resistor, 641 500kohm_to_gnd: connected to ground via a 500kOhm resistor, 642 640kohm_to_gnd: connected to ground via a 640kOhm resistor, 643 three_state: left floating. 644 For a list of available output power down options read 645 outX_powerdown_mode_available. If Y is not present the 646 mode is shared across all outputs. 647 648What: /sys/.../iio:deviceX/out_voltageY_powerdown_mode_available 649What: /sys/.../iio:deviceX/out_voltage_powerdown_mode_available 650What: /sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available 651What: /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available 652KernelVersion: 2.6.38 653Contact: linux-iio@vger.kernel.org 654Description: 655 Lists all available output power down modes. 656 If Y is not present the mode is shared across all outputs. 657 658What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown 659What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown 660What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown 661What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown 662KernelVersion: 2.6.38 663Contact: linux-iio@vger.kernel.org 664Description: 665 Writing 1 causes output Y to enter the power down mode specified 666 by the corresponding outY_powerdown_mode. DAC output stage is 667 disconnected from the amplifier. Clearing returns to normal 668 operation. Y may be suppressed if all outputs are controlled 669 together. 670 671What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency 672KernelVersion: 3.4.0 673Contact: linux-iio@vger.kernel.org 674Description: 675 Output frequency for channel Y in Hz. The number must always be 676 specified and unique if the output corresponds to a single 677 channel. 678 Some drivers have additional constraints: 679 ADF4371 has an integrated VCO with fundamendal output 680 frequency ranging from 4000000000 Hz 8000000000 Hz. 681 682 out_altvoltage0_frequency: 683 A divide by 1, 2, 4, 8, 16, 32 or circuit generates 684 frequencies from 62500000 Hz to 8000000000 Hz. 685 out_altvoltage1_frequency: 686 This channel duplicates the channel 0 frequency 687 out_altvoltage2_frequency: 688 A frequency doubler generates frequencies from 689 8000000000 Hz to 16000000000 Hz. 690 out_altvoltage3_frequency: 691 A frequency quadrupler generates frequencies from 692 16000000000 Hz to 32000000000 Hz. 693 694 Note: writes to one of the channels will affect the frequency of 695 all the other channels, since it involves changing the VCO 696 fundamental output frequency. 697 698What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase 699KernelVersion: 3.4.0 700Contact: linux-iio@vger.kernel.org 701Description: 702 Phase in radians of one frequency/clock output Y 703 (out_altvoltageY) relative to another frequency/clock output 704 (out_altvoltageZ) of the device X. The number must always be 705 specified and unique if the output corresponds to a single 706 channel. 707 708What: /sys/bus/iio/devices/iio:deviceX/out_currentY_raw 709Date: May 2012 710KernelVersion: 3.5 711Contact: Johan Hovold <jhovold@gmail.com> 712Description: 713 Set/get output current for channel Y. Units after application 714 of scale and offset are milliamps. 715 For some devices current channels are used to specify 716 current supplied to elements used in taking a measurement 717 of a different type. E.g. LED currents. 718 719What: /sys/bus/iio/devices/iio:deviceX/events 720KernelVersion: 2.6.35 721Contact: linux-iio@vger.kernel.org 722Description: 723 Configuration of which hardware generated events are passed up 724 to user-space. 725 726What: /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en 727What: /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en 728What: /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en 729What: /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en 730What: /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en 731What: /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en 732What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en 733What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en 734What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en 735What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en 736What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en 737What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en 738What: /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en 739What: /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en 740What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en 741What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en 742What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en 743What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en 744What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_rising_en 745What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_falling_en 746What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_rising_en 747What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_falling_en 748What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_en 749What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_en 750What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_rising_en 751What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_falling_en 752What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en 753What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en 754What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en 755What: /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en 756What: /sys/.../iio:deviceX/events/in_voltageY_thresh_either_en 757What: /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en 758What: /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en 759What: /sys/.../iio:deviceX/events/in_capacitanceY_thresh_rising_en 760What: /sys/.../iio:deviceX/events/in_capacitanceY_thresh_falling_en 761KernelVersion: 2.6.37 762Contact: linux-iio@vger.kernel.org 763Description: 764 Event generated when channel passes a threshold in the specified 765 (_rising|_falling) direction. If the direction is not specified, 766 then either the device will report an event which ever direction 767 a single threshold value is passed in (e.g. 768 <type>[Y][_name]_<raw|input>_thresh_value) or 769 <type>[Y][_name]_<raw|input>_thresh_rising_value and 770 <type>[Y][_name]_<raw|input>_thresh_falling_value may take 771 different values, but the device can only enable both thresholds 772 or neither. 773 774 Note the driver will assume the last p events requested are 775 to be enabled where p is how many it supports (which may vary 776 depending on the exact set requested. So if you want to be 777 sure you have set what you think you have, check the contents of 778 these attributes after everything is configured. Drivers may 779 have to buffer any parameters so that they are consistent when 780 a given event type is enabled at a future point (and not those for 781 whatever event was previously enabled). 782 783What: /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en 784What: /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en 785What: /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en 786What: /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en 787What: /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en 788What: /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en 789What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en 790What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en 791What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en 792What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en 793What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en 794What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en 795What: /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en 796What: /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en 797What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en 798What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en 799What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en 800What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en 801What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_rising_en 802What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_falling_en 803What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_rising_en 804What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_falling_en 805What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_rising_en 806What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_falling_en 807What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_rising_en 808What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_falling_en 809What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en 810What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en 811What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en 812What: /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en 813What: /sys/.../iio:deviceX/events/in_tempY_roc_rising_en 814What: /sys/.../iio:deviceX/events/in_tempY_roc_falling_en 815KernelVersion: 2.6.37 816Contact: linux-iio@vger.kernel.org 817Description: 818 Event generated when channel passes a threshold on the rate of 819 change (1st differential) in the specified (_rising|_falling) 820 direction. If the direction is not specified, then either the 821 device will report an event which ever direction a single 822 threshold value is passed in (e.g. 823 <type>[Y][_name]_<raw|input>_roc_value) or 824 <type>[Y][_name]_<raw|input>_roc_rising_value and 825 <type>[Y][_name]_<raw|input>_roc_falling_value may take 826 different values, but the device can only enable both rate of 827 change thresholds or neither. 828 829 Note the driver will assume the last p events requested are 830 to be enabled where p is however many it supports (which may 831 vary depending on the exact set requested. So if you want to be 832 sure you have set what you think you have, check the contents of 833 these attributes after everything is configured. Drivers may 834 have to buffer any parameters so that they are consistent when 835 a given event type is enabled a future point (and not those for 836 whatever event was previously enabled). 837 838What: /sys/.../events/in_capacitanceY_adaptive_thresh_rising_en 839What: /sys/.../events/in_capacitanceY_adaptive_thresh_falling_en 840KernelVersion: 5.13 841Contact: linux-iio@vger.kernel.org 842Description: 843 Adaptive thresholds are similar to normal fixed thresholds 844 but the value is expressed as an offset from a value which 845 provides a low frequency approximation of the channel itself. 846 Thus these detect if a rapid change occurs in the specified 847 direction which crosses tracking value + offset. 848 Tracking value calculation is devices specific. 849 850What: /sys/.../in_capacitanceY_adaptive_thresh_rising_timeout 851What: /sys/.../in_capacitanceY_adaptive_thresh_falling_timeout 852KernelVersion: 5.11 853Contact: linux-iio@vger.kernel.org 854Description: 855 When adaptive thresholds are used, the tracking signal 856 may adjust too slowly to step changes in the raw signal. 857 Thus these specify the time in seconds for which the 858 difference between the slow tracking signal and the raw 859 signal is allowed to remain out-of-range before a reset 860 event occurs in which the tracking signal is made equal 861 to the raw signal, allowing slow tracking to resume and the 862 adaptive threshold event detection to function as expected. 863 864What: /sys/.../events/in_accel_thresh_rising_value 865What: /sys/.../events/in_accel_thresh_falling_value 866What: /sys/.../events/in_accel_x_raw_thresh_rising_value 867What: /sys/.../events/in_accel_x_raw_thresh_falling_value 868What: /sys/.../events/in_accel_y_raw_thresh_rising_value 869What: /sys/.../events/in_accel_y_raw_thresh_falling_value 870What: /sys/.../events/in_accel_z_raw_thresh_rising_value 871What: /sys/.../events/in_accel_z_raw_thresh_falling_value 872What: /sys/.../events/in_anglvel_x_raw_thresh_rising_value 873What: /sys/.../events/in_anglvel_x_raw_thresh_falling_value 874What: /sys/.../events/in_anglvel_y_raw_thresh_rising_value 875What: /sys/.../events/in_anglvel_y_raw_thresh_falling_value 876What: /sys/.../events/in_anglvel_z_raw_thresh_rising_value 877What: /sys/.../events/in_anglvel_z_raw_thresh_falling_value 878What: /sys/.../events/in_magn_x_raw_thresh_rising_value 879What: /sys/.../events/in_magn_x_raw_thresh_falling_value 880What: /sys/.../events/in_magn_y_raw_thresh_rising_value 881What: /sys/.../events/in_magn_y_raw_thresh_falling_value 882What: /sys/.../events/in_magn_z_raw_thresh_rising_value 883What: /sys/.../events/in_magn_z_raw_thresh_falling_value 884What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_rising_value 885What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_falling_value 886What: /sys/.../events/in_rot_from_north_true_raw_thresh_rising_value 887What: /sys/.../events/in_rot_from_north_true_raw_thresh_falling_value 888What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_rising_value 889What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_falling_value 890What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_rising_value 891What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_falling_value 892What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value 893What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value 894What: /sys/.../events/in_voltageY_raw_thresh_rising_value 895What: /sys/.../events/in_voltageY_raw_thresh_falling_value 896What: /sys/.../events/in_tempY_raw_thresh_rising_value 897What: /sys/.../events/in_tempY_raw_thresh_falling_value 898What: /sys/.../events/in_illuminance0_thresh_falling_value 899What: /sys/.../events/in_illuminance0_thresh_rising_value 900What: /sys/.../events/in_proximity0_thresh_falling_value 901What: /sys/.../events/in_proximity0_thresh_rising_value 902What: /sys/.../events/in_illuminance_thresh_rising_value 903What: /sys/.../events/in_illuminance_thresh_falling_value 904What: /sys/.../events/in_capacitanceY_thresh_rising_value 905What: /sys/.../events/in_capacitanceY_thresh_falling_value 906What: /sys/.../events/in_capacitanceY_thresh_adaptive_rising_value 907What: /sys/.../events/in_capacitanceY_thresh_falling_rising_value 908KernelVersion: 2.6.37 909Contact: linux-iio@vger.kernel.org 910Description: 911 Specifies the value of threshold that the device is comparing 912 against for the events enabled by 913 <type>Y[_name]_thresh[_rising|falling]_en. 914 915 If separate attributes exist for the two directions, but 916 direction is not specified for this attribute, then a single 917 threshold value applies to both directions. 918 919 The raw or input element of the name indicates whether the 920 value is in raw device units or in processed units (as _raw 921 and _input do on sysfs direct channel read attributes). 922 923What: /sys/.../events/in_accel_scale 924What: /sys/.../events/in_accel_peak_scale 925What: /sys/.../events/in_anglvel_scale 926What: /sys/.../events/in_magn_scale 927What: /sys/.../events/in_rot_from_north_magnetic_scale 928What: /sys/.../events/in_rot_from_north_true_scale 929What: /sys/.../events/in_voltage_scale 930What: /sys/.../events/in_voltage_supply_scale 931What: /sys/.../events/in_temp_scale 932What: /sys/.../events/in_illuminance_scale 933What: /sys/.../events/in_proximity_scale 934KernelVersion: 3.21 935Contact: linux-iio@vger.kernel.org 936Description: 937 Specifies the conversion factor from the standard units 938 to device specific units used to set the event trigger 939 threshold. 940 941What: /sys/.../events/in_accel_x_thresh_rising_hysteresis 942What: /sys/.../events/in_accel_x_thresh_falling_hysteresis 943What: /sys/.../events/in_accel_x_thresh_either_hysteresis 944What: /sys/.../events/in_accel_y_thresh_rising_hysteresis 945What: /sys/.../events/in_accel_y_thresh_falling_hysteresis 946What: /sys/.../events/in_accel_y_thresh_either_hysteresis 947What: /sys/.../events/in_accel_z_thresh_rising_hysteresis 948What: /sys/.../events/in_accel_z_thresh_falling_hysteresis 949What: /sys/.../events/in_accel_z_thresh_either_hysteresis 950What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis 951What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis 952What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis 953What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis 954What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis 955What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis 956What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis 957What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis 958What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis 959What: /sys/.../events/in_magn_x_thresh_rising_hysteresis 960What: /sys/.../events/in_magn_x_thresh_falling_hysteresis 961What: /sys/.../events/in_magn_x_thresh_either_hysteresis 962What: /sys/.../events/in_magn_y_thresh_rising_hysteresis 963What: /sys/.../events/in_magn_y_thresh_falling_hysteresis 964What: /sys/.../events/in_magn_y_thresh_either_hysteresis 965What: /sys/.../events/in_magn_z_thresh_rising_hysteresis 966What: /sys/.../events/in_magn_z_thresh_falling_hysteresis 967What: /sys/.../events/in_magn_z_thresh_either_hysteresis 968What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_hysteresis 969What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_hysteresis 970What: /sys/.../events/in_rot_from_north_magnetic_thresh_either_hysteresis 971What: /sys/.../events/in_rot_from_north_true_thresh_rising_hysteresis 972What: /sys/.../events/in_rot_from_north_true_thresh_falling_hysteresis 973What: /sys/.../events/in_rot_from_north_true_thresh_either_hysteresis 974What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_hysteresis 975What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_hysteresis 976What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_either_hysteresis 977What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_hysteresis 978What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_hysteresis 979What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_either_hysteresis 980What: /sys/.../events/in_voltageY_thresh_rising_hysteresis 981What: /sys/.../events/in_voltageY_thresh_falling_hysteresis 982What: /sys/.../events/in_voltageY_thresh_either_hysteresis 983What: /sys/.../events/in_tempY_thresh_rising_hysteresis 984What: /sys/.../events/in_tempY_thresh_falling_hysteresis 985What: /sys/.../events/in_tempY_thresh_either_hysteresis 986What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis 987What: /sys/.../events/in_illuminance0_thresh_rising_hysteresis 988What: /sys/.../events/in_illuminance0_thresh_either_hysteresis 989What: /sys/.../events/in_proximity0_thresh_falling_hysteresis 990What: /sys/.../events/in_proximity0_thresh_rising_hysteresis 991What: /sys/.../events/in_proximity0_thresh_either_hysteresis 992KernelVersion: 3.13 993Contact: linux-iio@vger.kernel.org 994Description: 995 Specifies the hysteresis of threshold that the device is comparing 996 against for the events enabled by 997 <type>Y[_name]_thresh[_(rising|falling)]_hysteresis. 998 If separate attributes exist for the two directions, but 999 direction is not specified for this attribute, then a single 1000 hysteresis value applies to both directions. 1001 1002 For falling events the hysteresis is added to the _value attribute for 1003 this event to get the upper threshold for when the event goes back to 1004 normal, for rising events the hysteresis is subtracted from the _value 1005 attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200 1006 and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event 1007 will get activated once in_voltage0_raw goes above 1200 and will become 1008 deactivated again once the value falls below 1150. 1009 1010What: /sys/.../events/in_accel_x_raw_roc_rising_value 1011What: /sys/.../events/in_accel_x_raw_roc_falling_value 1012What: /sys/.../events/in_accel_y_raw_roc_rising_value 1013What: /sys/.../events/in_accel_y_raw_roc_falling_value 1014What: /sys/.../events/in_accel_z_raw_roc_rising_value 1015What: /sys/.../events/in_accel_z_raw_roc_falling_value 1016What: /sys/.../events/in_anglvel_x_raw_roc_rising_value 1017What: /sys/.../events/in_anglvel_x_raw_roc_falling_value 1018What: /sys/.../events/in_anglvel_y_raw_roc_rising_value 1019What: /sys/.../events/in_anglvel_y_raw_roc_falling_value 1020What: /sys/.../events/in_anglvel_z_raw_roc_rising_value 1021What: /sys/.../events/in_anglvel_z_raw_roc_falling_value 1022What: /sys/.../events/in_magn_x_raw_roc_rising_value 1023What: /sys/.../events/in_magn_x_raw_roc_falling_value 1024What: /sys/.../events/in_magn_y_raw_roc_rising_value 1025What: /sys/.../events/in_magn_y_raw_roc_falling_value 1026What: /sys/.../events/in_magn_z_raw_roc_rising_value 1027What: /sys/.../events/in_magn_z_raw_roc_falling_value 1028What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_rising_value 1029What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_falling_value 1030What: /sys/.../events/in_rot_from_north_true_raw_roc_rising_value 1031What: /sys/.../events/in_rot_from_north_true_raw_roc_falling_value 1032What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_rising_value 1033What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_falling_value 1034What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_rising_value 1035What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_falling_value 1036What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value 1037What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value 1038What: /sys/.../events/in_voltageY_raw_roc_rising_value 1039What: /sys/.../events/in_voltageY_raw_roc_falling_value 1040What: /sys/.../events/in_tempY_raw_roc_rising_value 1041What: /sys/.../events/in_tempY_raw_roc_falling_value 1042KernelVersion: 2.6.37 1043Contact: linux-iio@vger.kernel.org 1044Description: 1045 Specifies the value of rate of change threshold that the 1046 device is comparing against for the events enabled by 1047 <type>[Y][_name]_roc[_rising|falling]_en. 1048 1049 If separate attributes exist for the two directions, 1050 but direction is not specified for this attribute, 1051 then a single threshold value applies to both directions. 1052 The raw or input element of the name indicates whether the 1053 value is in raw device units or in processed units (as _raw 1054 and _input do on sysfs direct channel read attributes). 1055 1056What: /sys/.../events/in_accel_x_thresh_rising_period 1057What: /sys/.../events/in_accel_x_thresh_falling_period 1058What: /sys/.../events/in_accel_x_roc_rising_period 1059What: /sys/.../events/in_accel_x_roc_falling_period 1060What: /sys/.../events/in_accel_y_thresh_rising_period 1061What: /sys/.../events/in_accel_y_thresh_falling_period 1062What: /sys/.../events/in_accel_y_roc_rising_period 1063What: /sys/.../events/in_accel_y_roc_falling_period 1064What: /sys/.../events/in_accel_z_thresh_rising_period 1065What: /sys/.../events/in_accel_z_thresh_falling_period 1066What: /sys/.../events/in_accel_z_roc_rising_period 1067What: /sys/.../events/in_accel_z_roc_falling_period 1068What: /sys/.../events/in_anglvel_x_thresh_rising_period 1069What: /sys/.../events/in_anglvel_x_thresh_falling_period 1070What: /sys/.../events/in_anglvel_x_roc_rising_period 1071What: /sys/.../events/in_anglvel_x_roc_falling_period 1072What: /sys/.../events/in_anglvel_y_thresh_rising_period 1073What: /sys/.../events/in_anglvel_y_thresh_falling_period 1074What: /sys/.../events/in_anglvel_y_roc_rising_period 1075What: /sys/.../events/in_anglvel_y_roc_falling_period 1076What: /sys/.../events/in_anglvel_z_thresh_rising_period 1077What: /sys/.../events/in_anglvel_z_thresh_falling_period 1078What: /sys/.../events/in_anglvel_z_roc_rising_period 1079What: /sys/.../events/in_anglvel_z_roc_falling_period 1080What: /sys/.../events/in_magn_x_thresh_rising_period 1081What: /sys/.../events/in_magn_x_thresh_falling_period 1082What: /sys/.../events/in_magn_x_roc_rising_period 1083What: /sys/.../events/in_magn_x_roc_falling_period 1084What: /sys/.../events/in_magn_y_thresh_rising_period 1085What: /sys/.../events/in_magn_y_thresh_falling_period 1086What: /sys/.../events/in_magn_y_roc_rising_period 1087What: /sys/.../events/in_magn_y_roc_falling_period 1088What: /sys/.../events/in_magn_z_thresh_rising_period 1089What: /sys/.../events/in_magn_z_thresh_falling_period 1090What: /sys/.../events/in_magn_z_roc_rising_period 1091What: /sys/.../events/in_magn_z_roc_falling_period 1092What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_period 1093What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_period 1094What: /sys/.../events/in_rot_from_north_magnetic_roc_rising_period 1095What: /sys/.../events/in_rot_from_north_magnetic_roc_falling_period 1096What: /sys/.../events/in_rot_from_north_true_thresh_rising_period 1097What: /sys/.../events/in_rot_from_north_true_thresh_falling_period 1098What: /sys/.../events/in_rot_from_north_true_roc_rising_period 1099What: /sys/.../events/in_rot_from_north_true_roc_falling_period 1100What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_period 1101What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_period 1102What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_rising_period 1103What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_falling_period 1104What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_period 1105What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_period 1106What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_rising_period 1107What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_falling_period 1108What: /sys/.../events/in_voltageY_supply_thresh_rising_period 1109What: /sys/.../events/in_voltageY_supply_thresh_falling_period 1110What: /sys/.../events/in_voltageY_supply_roc_rising_period 1111What: /sys/.../events/in_voltageY_supply_roc_falling_period 1112What: /sys/.../events/in_voltageY_thresh_rising_period 1113What: /sys/.../events/in_voltageY_thresh_falling_period 1114What: /sys/.../events/in_voltageY_roc_rising_period 1115What: /sys/.../events/in_voltageY_roc_falling_period 1116What: /sys/.../events/in_tempY_thresh_rising_period 1117What: /sys/.../events/in_tempY_thresh_falling_period 1118What: /sys/.../events/in_tempY_roc_rising_period 1119What: /sys/.../events/in_tempY_roc_falling_period 1120What: /sys/.../events/in_accel_x&y&z_mag_falling_period 1121What: /sys/.../events/in_intensity0_thresh_period 1122What: /sys/.../events/in_proximity0_thresh_period 1123What: /sys/.../events/in_activity_still_thresh_rising_period 1124What: /sys/.../events/in_activity_still_thresh_falling_period 1125What: /sys/.../events/in_activity_walking_thresh_rising_period 1126What: /sys/.../events/in_activity_walking_thresh_falling_period 1127What: /sys/.../events/in_activity_jogging_thresh_rising_period 1128What: /sys/.../events/in_activity_jogging_thresh_falling_period 1129What: /sys/.../events/in_activity_running_thresh_rising_period 1130What: /sys/.../events/in_activity_running_thresh_falling_period 1131What: /sys/.../events/in_illuminance_thresh_either_period 1132KernelVersion: 2.6.37 1133Contact: linux-iio@vger.kernel.org 1134Description: 1135 Period of time (in seconds) for which the condition must be 1136 met before an event is generated. If direction is not 1137 specified then this period applies to both directions. 1138 1139What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db 1140What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db 1141What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db 1142KernelVersion: 4.2 1143Contact: linux-iio@vger.kernel.org 1144Description: 1145 If a low pass filter can be applied to the event generation 1146 this property gives its 3db frequency in Hz. 1147 A value of zero disables the filter. 1148 1149What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db 1150What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db 1151What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db 1152KernelVersion: 4.2 1153Contact: linux-iio@vger.kernel.org 1154Description: 1155 If a high pass filter can be applied to the event generation 1156 this property gives its 3db frequency in Hz. 1157 A value of zero disables the filter. 1158 1159What: /sys/.../events/in_activity_still_thresh_rising_en 1160What: /sys/.../events/in_activity_still_thresh_falling_en 1161What: /sys/.../events/in_activity_walking_thresh_rising_en 1162What: /sys/.../events/in_activity_walking_thresh_falling_en 1163What: /sys/.../events/in_activity_jogging_thresh_rising_en 1164What: /sys/.../events/in_activity_jogging_thresh_falling_en 1165What: /sys/.../events/in_activity_running_thresh_rising_en 1166What: /sys/.../events/in_activity_running_thresh_falling_en 1167KernelVersion: 3.19 1168Contact: linux-iio@vger.kernel.org 1169Description: 1170 Enables or disables activity events. Depending on direction 1171 an event is generated when sensor ENTERS or LEAVES a given state. 1172 1173What: /sys/.../events/in_activity_still_thresh_rising_value 1174What: /sys/.../events/in_activity_still_thresh_falling_value 1175What: /sys/.../events/in_activity_walking_thresh_rising_value 1176What: /sys/.../events/in_activity_walking_thresh_falling_value 1177What: /sys/.../events/in_activity_jogging_thresh_rising_value 1178What: /sys/.../events/in_activity_jogging_thresh_falling_value 1179What: /sys/.../events/in_activity_running_thresh_rising_value 1180What: /sys/.../events/in_activity_running_thresh_falling_value 1181KernelVersion: 3.19 1182Contact: linux-iio@vger.kernel.org 1183Description: 1184 Confidence value (in units as percentage) to be used 1185 for deciding when an event should be generated. E.g for 1186 running: If the confidence value reported by the sensor 1187 is greater than in_activity_running_thresh_rising_value 1188 then the sensor ENTERS running state. Conversely, if the 1189 confidence value reported by the sensor is lower than 1190 in_activity_running_thresh_falling_value then the sensor 1191 is LEAVING running state. 1192 1193What: /sys/.../iio:deviceX/events/in_accel_mag_en 1194What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en 1195What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en 1196What: /sys/.../iio:deviceX/events/in_accel_x_mag_en 1197What: /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en 1198What: /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en 1199What: /sys/.../iio:deviceX/events/in_accel_y_mag_en 1200What: /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en 1201What: /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en 1202What: /sys/.../iio:deviceX/events/in_accel_z_mag_en 1203What: /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en 1204What: /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en 1205What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en 1206What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en 1207KernelVersion: 2.6.37 1208Contact: linux-iio@vger.kernel.org 1209Description: 1210 Similar to in_accel_x_thresh[_rising|_falling]_en, but here the 1211 magnitude of the channel is compared to the threshold, not its 1212 signed value. 1213 1214What: /sys/.../events/in_accel_raw_mag_value 1215What: /sys/.../events/in_accel_x_raw_mag_rising_value 1216What: /sys/.../events/in_accel_y_raw_mag_rising_value 1217What: /sys/.../events/in_accel_z_raw_mag_rising_value 1218KernelVersion: 2.6.37 1219Contact: linux-iio@vger.kernel.org 1220Description: 1221 The value to which the magnitude of the channel is compared. If 1222 number or direction is not specified, applies to all channels of 1223 this type. 1224 1225What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_en 1226What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_rising_en 1227What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_falling_en 1228What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_en 1229What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_rising_en 1230What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_falling_en 1231KernelVersion: 5.18 1232Contact: linux-iio@vger.kernel.org 1233Description: 1234 Similar to in_accel_mag[_y][_rising|_falling]_en, but the event 1235 value is relative to a reference magnitude. The reference magnitude 1236 includes the graviational acceleration. 1237 1238What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_value 1239What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_rising_value 1240What: /sys/.../iio:deviceX/events/in_accel_mag_referenced_falling_value 1241What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_value 1242What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_rising_value 1243What: /sys/.../iio:deviceX/events/in_accel_y_mag_referenced_falling_value 1244KernelVersion: 5.18 1245Contact: linux-iio@vger.kernel.org 1246Description: 1247 The value to which the reference magnitude of the channel is 1248 compared. If the axis is not specified, it applies to all channels 1249 of this type. 1250 1251What: /sys/.../events/in_steps_change_en 1252KernelVersion: 4.0 1253Contact: linux-iio@vger.kernel.org 1254Description: 1255 Event generated when channel passes a threshold on the absolute 1256 change in value. E.g. for steps: a step change event is 1257 generated each time the user takes N steps, where N is set using 1258 in_steps_change_value. 1259 1260What: /sys/.../events/in_steps_change_value 1261KernelVersion: 4.0 1262Contact: linux-iio@vger.kernel.org 1263Description: 1264 Specifies the value of change threshold that the 1265 device is comparing against for the events enabled by 1266 <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps: 1267 if set to 3, a step change event will be generated every 3 1268 steps. 1269 1270What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger 1271KernelVersion: 2.6.35 1272Contact: linux-iio@vger.kernel.org 1273Description: 1274 The name of the trigger source being used, as per string given 1275 in /sys/class/iio/triggerY/name. 1276 1277What: /sys/bus/iio/devices/iio:deviceX/bufferY/length 1278KernelVersion: 5.11 1279Contact: linux-iio@vger.kernel.org 1280Description: 1281 Number of scans contained by the buffer. 1282 1283What: /sys/bus/iio/devices/iio:deviceX/bufferY/enable 1284KernelVersion: 5.11 1285Contact: linux-iio@vger.kernel.org 1286Description: 1287 Actually start the buffer capture up. Will start trigger 1288 if first device and appropriate. 1289 1290 Note that it might be impossible to configure other attributes, 1291 (e.g.: events, scale, sampling rate) if they impact the currently 1292 active buffer capture session. 1293 1294What: /sys/bus/iio/devices/iio:deviceX/bufferY 1295KernelVersion: 5.11 1296Contact: linux-iio@vger.kernel.org 1297Description: 1298 Directory containing interfaces for elements that will be 1299 captured for a single triggered sample set in the buffer. 1300 1301 Since kernel 5.11 the scan_elements attributes are merged into 1302 the bufferY directory, to be configurable per buffer. 1303 1304What: /sys/.../iio:deviceX/bufferY/in_accel_x_en 1305What: /sys/.../iio:deviceX/bufferY/in_accel_y_en 1306What: /sys/.../iio:deviceX/bufferY/in_accel_z_en 1307What: /sys/.../iio:deviceX/bufferY/in_anglvel_x_en 1308What: /sys/.../iio:deviceX/bufferY/in_anglvel_y_en 1309What: /sys/.../iio:deviceX/bufferY/in_anglvel_z_en 1310What: /sys/.../iio:deviceX/bufferY/in_magn_x_en 1311What: /sys/.../iio:deviceX/bufferY/in_magn_y_en 1312What: /sys/.../iio:deviceX/bufferY/in_magn_z_en 1313What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_magnetic_en 1314What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_true_en 1315What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_magnetic_tilt_comp_en 1316What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_true_tilt_comp_en 1317What: /sys/.../iio:deviceX/bufferY/in_timestamp_en 1318What: /sys/.../iio:deviceX/bufferY/in_voltageY_supply_en 1319What: /sys/.../iio:deviceX/bufferY/in_voltageY_en 1320What: /sys/.../iio:deviceX/bufferY/in_voltageY-voltageZ_en 1321What: /sys/.../iio:deviceX/bufferY/in_voltageY_i_en 1322What: /sys/.../iio:deviceX/bufferY/in_voltageY_q_en 1323What: /sys/.../iio:deviceX/bufferY/in_voltage_i_en 1324What: /sys/.../iio:deviceX/bufferY/in_voltage_q_en 1325What: /sys/.../iio:deviceX/bufferY/in_incli_x_en 1326What: /sys/.../iio:deviceX/bufferY/in_incli_y_en 1327What: /sys/.../iio:deviceX/bufferY/in_pressureY_en 1328What: /sys/.../iio:deviceX/bufferY/in_pressure_en 1329What: /sys/.../iio:deviceX/bufferY/in_rot_quaternion_en 1330What: /sys/.../iio:deviceX/bufferY/in_proximity_en 1331KernelVersion: 5.11 1332Contact: linux-iio@vger.kernel.org 1333Description: 1334 Scan element control for triggered data capture. 1335 1336What: /sys/.../iio:deviceX/bufferY/in_accel_type 1337What: /sys/.../iio:deviceX/bufferY/in_anglvel_type 1338What: /sys/.../iio:deviceX/bufferY/in_magn_type 1339What: /sys/.../iio:deviceX/bufferY/in_incli_type 1340What: /sys/.../iio:deviceX/bufferY/in_voltageY_type 1341What: /sys/.../iio:deviceX/bufferY/in_voltage_type 1342What: /sys/.../iio:deviceX/bufferY/in_voltageY_supply_type 1343What: /sys/.../iio:deviceX/bufferY/in_voltageY_i_type 1344What: /sys/.../iio:deviceX/bufferY/in_voltageY_q_type 1345What: /sys/.../iio:deviceX/bufferY/in_voltage_i_type 1346What: /sys/.../iio:deviceX/bufferY/in_voltage_q_type 1347What: /sys/.../iio:deviceX/bufferY/in_timestamp_type 1348What: /sys/.../iio:deviceX/bufferY/in_pressureY_type 1349What: /sys/.../iio:deviceX/bufferY/in_pressure_type 1350What: /sys/.../iio:deviceX/bufferY/in_rot_quaternion_type 1351What: /sys/.../iio:deviceX/bufferY/in_proximity_type 1352KernelVersion: 5.11 1353Contact: linux-iio@vger.kernel.org 1354Description: 1355 Description of the scan element data storage within the buffer 1356 and hence the form in which it is read from user-space. 1357 Form is [be|le]:[s|u]bits/storagebits[>>shift]. 1358 be or le specifies big or little endian. s or u specifies if 1359 signed (2's complement) or unsigned. bits is the number of bits 1360 of data and storagebits is the space (after padding) that it 1361 occupies in the buffer. shift if specified, is the shift that 1362 needs to be applied prior to masking out unused bits. Some 1363 devices put their data in the middle of the transferred elements 1364 with additional information on both sides. Note that some 1365 devices will have additional information in the unused bits 1366 so to get a clean value, the bits value must be used to mask 1367 the buffer output value appropriately. The storagebits value 1368 also specifies the data alignment. So s48/64>>2 will be a 1369 signed 48 bit integer stored in a 64 bit location aligned to 1370 a 64 bit boundary. To obtain the clean value, shift right 2 1371 and apply a mask to zero the top 16 bits of the result. 1372 For other storage combinations this attribute will be extended 1373 appropriately. 1374 1375What: /sys/.../iio:deviceX/scan_elements/in_accel_type_available 1376KernelVersion: 2.6.37 1377Contact: linux-iio@vger.kernel.org 1378Description: 1379 If the type parameter can take one of a small set of values, 1380 this attribute lists them. 1381 1382What: /sys/.../iio:deviceX/bufferY/in_voltageY_index 1383What: /sys/.../iio:deviceX/bufferY/in_voltageY_supply_index 1384What: /sys/.../iio:deviceX/bufferY/in_voltageY_i_index 1385What: /sys/.../iio:deviceX/bufferY/in_voltageY_q_index 1386What: /sys/.../iio:deviceX/bufferY/in_voltage_i_index 1387What: /sys/.../iio:deviceX/bufferY/in_voltage_q_index 1388What: /sys/.../iio:deviceX/bufferY/in_accel_x_index 1389What: /sys/.../iio:deviceX/bufferY/in_accel_y_index 1390What: /sys/.../iio:deviceX/bufferY/in_accel_z_index 1391What: /sys/.../iio:deviceX/bufferY/in_anglvel_x_index 1392What: /sys/.../iio:deviceX/bufferY/in_anglvel_y_index 1393What: /sys/.../iio:deviceX/bufferY/in_anglvel_z_index 1394What: /sys/.../iio:deviceX/bufferY/in_magn_x_index 1395What: /sys/.../iio:deviceX/bufferY/in_magn_y_index 1396What: /sys/.../iio:deviceX/bufferY/in_magn_z_index 1397What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_magnetic_index 1398What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_true_index 1399What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_magnetic_tilt_comp_index 1400What: /sys/.../iio:deviceX/bufferY/in_rot_from_north_true_tilt_comp_index 1401What: /sys/.../iio:deviceX/bufferY/in_incli_x_index 1402What: /sys/.../iio:deviceX/bufferY/in_incli_y_index 1403What: /sys/.../iio:deviceX/bufferY/in_timestamp_index 1404What: /sys/.../iio:deviceX/bufferY/in_pressureY_index 1405What: /sys/.../iio:deviceX/bufferY/in_pressure_index 1406What: /sys/.../iio:deviceX/bufferY/in_rot_quaternion_index 1407What: /sys/.../iio:deviceX/bufferY/in_proximity_index 1408KernelVersion: 5.11 1409Contact: linux-iio@vger.kernel.org 1410Description: 1411 A single positive integer specifying the position of this 1412 scan element in the buffer. Note these are not dependent on 1413 what is enabled and may not be contiguous. Thus for user-space 1414 to establish the full layout these must be used in conjunction 1415 with all _en attributes to establish which channels are present, 1416 and the relevant _type attributes to establish the data storage 1417 format. 1418 1419What: /sys/.../iio:deviceX/in_activity_still_input 1420What: /sys/.../iio:deviceX/in_activity_walking_input 1421What: /sys/.../iio:deviceX/in_activity_jogging_input 1422What: /sys/.../iio:deviceX/in_activity_running_input 1423KernelVersion: 3.19 1424Contact: linux-iio@vger.kernel.org 1425Description: 1426 This attribute is used to read the confidence for an activity 1427 expressed in units as percentage. 1428 1429What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw 1430KernelVersion: 2.6.38 1431Contact: linux-iio@vger.kernel.org 1432Description: 1433 This attribute is used to read the amount of quadrature error 1434 present in the device at a given time. 1435 1436What: /sys/.../iio:deviceX/in_accelX_power_mode 1437KernelVersion: 3.11 1438Contact: linux-iio@vger.kernel.org 1439Description: 1440 Specifies the chip power mode. 1441 low_noise: reduce noise level from ADC, 1442 low_power: enable low current consumption. 1443 For a list of available output power modes read 1444 in_accel_power_mode_available. 1445 1446What: /sys/.../iio:deviceX/in_energy_input 1447What: /sys/.../iio:deviceX/in_energy_raw 1448KernelVersion: 4.0 1449Contact: linux-iio@vger.kernel.org 1450Description: 1451 This attribute is used to read the energy value reported by the 1452 device (e.g.: human activity sensors report energy burnt by the 1453 user). Units after application of scale are Joules. 1454 1455What: /sys/.../iio:deviceX/in_distance_input 1456What: /sys/.../iio:deviceX/in_distance_raw 1457KernelVersion: 4.0 1458Contact: linux-iio@vger.kernel.org 1459Description: 1460 This attribute is used to read the measured distance to an object 1461 or the distance covered by the user since the last reboot while 1462 activated. Units after application of scale are meters. 1463 1464What: /sys/bus/iio/devices/iio:deviceX/store_eeprom 1465KernelVersion: 3.4.0 1466Contact: linux-iio@vger.kernel.org 1467Description: 1468 Writing '1' stores the current device configuration into 1469 on-chip EEPROM. After power-up or chip reset the device will 1470 automatically load the saved configuration. 1471 1472What: /sys/.../iio:deviceX/in_proximity_raw 1473What: /sys/.../iio:deviceX/in_proximity_input 1474What: /sys/.../iio:deviceX/in_proximityY_raw 1475KernelVersion: 3.4 1476Contact: linux-iio@vger.kernel.org 1477Description: 1478 Proximity measurement indicating that some 1479 object is near the sensor, usually by observing 1480 reflectivity of infrared or ultrasound emitted. 1481 1482 Often these sensors are unit less and as such conversion 1483 to SI units is not possible. Higher proximity measurements 1484 indicate closer objects, and vice versa. Units after 1485 application of scale and offset are meters. 1486 1487What: /sys/.../iio:deviceX/in_illuminance_input 1488What: /sys/.../iio:deviceX/in_illuminance_raw 1489What: /sys/.../iio:deviceX/in_illuminanceY_input 1490What: /sys/.../iio:deviceX/in_illuminanceY_raw 1491What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw 1492What: /sys/.../iio:deviceX/in_illuminance_ir_raw 1493What: /sys/.../iio:deviceX/in_illuminance_clear_raw 1494KernelVersion: 3.4 1495Contact: linux-iio@vger.kernel.org 1496Description: 1497 Illuminance measurement, units after application of scale 1498 and offset are lux. 1499 1500What: /sys/.../iio:deviceX/in_intensityY_raw 1501What: /sys/.../iio:deviceX/in_intensityY_ir_raw 1502What: /sys/.../iio:deviceX/in_intensityY_both_raw 1503What: /sys/.../iio:deviceX/in_intensityY_uv_raw 1504What: /sys/.../iio:deviceX/in_intensityY_duv_raw 1505KernelVersion: 3.4 1506Contact: linux-iio@vger.kernel.org 1507Description: 1508 Unit-less light intensity. Modifiers both and ir indicate 1509 that measurements contain visible and infrared light 1510 components or just infrared light, respectively. Modifier 1511 uv indicates that measurements contain ultraviolet light 1512 components. Modifier duv indicates that measurements 1513 contain deep ultraviolet light components. 1514 1515What: /sys/.../iio:deviceX/in_uvindex_input 1516KernelVersion: 4.6 1517Contact: linux-iio@vger.kernel.org 1518Description: 1519 UV light intensity index measuring the human skin's response to 1520 different wavelength of sunlight weighted according to the 1521 standardised CIE Erythemal Action Spectrum. UV index values range 1522 from 0 (low) to >=11 (extreme). 1523 1524What: /sys/.../iio:deviceX/in_intensity_integration_time 1525What: /sys/.../iio:deviceX/in_intensity_red_integration_time 1526What: /sys/.../iio:deviceX/in_intensity_green_integration_time 1527What: /sys/.../iio:deviceX/in_intensity_blue_integration_time 1528What: /sys/.../iio:deviceX/in_intensity_clear_integration_time 1529What: /sys/.../iio:deviceX/in_illuminance_integration_time 1530KernelVersion: 3.12 1531Contact: linux-iio@vger.kernel.org 1532Description: 1533 This attribute is used to get/set the integration time in 1534 seconds. If shared across all channels of a given type, 1535 <type>_integration_time is used. 1536 1537What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time 1538KernelVersion: 4.0 1539Contact: linux-iio@vger.kernel.org 1540Description: 1541 Number of seconds in which to compute speed. 1542 1543What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw 1544KernelVersion: 3.15 1545Contact: linux-iio@vger.kernel.org 1546Description: 1547 Raw value of quaternion components using a format 1548 x y z w. Here x, y, and z component represents the axis about 1549 which a rotation will occur and w component represents the 1550 amount of rotation. 1551 1552What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_raw 1553What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_raw 1554What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_raw 1555What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_raw 1556KernelVersion: 3.15 1557Contact: linux-iio@vger.kernel.org 1558Description: 1559 Raw value of rotation from true/magnetic north measured with 1560 or without compensation from tilt sensors. 1561 1562What: /sys/bus/iio/devices/iio:deviceX/in_currentX_raw 1563What: /sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw 1564What: /sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw 1565KernelVersion: 3.18 1566Contact: linux-iio@vger.kernel.org 1567Description: 1568 Raw current measurement from channel X. Units are in milliamps 1569 after application of scale and offset. If no offset or scale is 1570 present, output should be considered as processed with the 1571 unit in milliamps. 1572 1573 Channels with 'i' and 'q' modifiers always exist in pairs and both 1574 channels refer to the same signal. The 'i' channel contains the in-phase 1575 component of the signal while the 'q' channel contains the quadrature 1576 component. 1577 1578What: /sys/.../iio:deviceX/in_energy_en 1579What: /sys/.../iio:deviceX/in_distance_en 1580What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en 1581What: /sys/.../iio:deviceX/in_steps_en 1582KernelVersion: 3.19 1583Contact: linux-iio@vger.kernel.org 1584Description: 1585 Activates a device feature that runs in firmware/hardware. 1586 E.g. for steps: the pedometer saves power while not used; 1587 when activated, it will count the steps taken by the user in 1588 firmware and export them through in_steps_input. 1589 1590What: /sys/.../iio:deviceX/in_steps_input 1591KernelVersion: 3.19 1592Contact: linux-iio@vger.kernel.org 1593Description: 1594 This attribute is used to read the number of steps taken by the user 1595 since the last reboot while activated. 1596 1597What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input 1598What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw 1599KernelVersion: 3.19 1600Contact: linux-iio@vger.kernel.org 1601Description: 1602 This attribute is used to read the current speed value of the 1603 user (which is the norm or magnitude of the velocity vector). 1604 Units after application of scale are m/s. 1605 1606What: /sys/.../iio:deviceX/in_steps_debounce_count 1607KernelVersion: 4.0 1608Contact: linux-iio@vger.kernel.org 1609Description: 1610 Specifies the number of steps that must occur within 1611 in_steps_filter_debounce_time for the pedometer to decide the 1612 consumer is making steps. 1613 1614What: /sys/.../iio:deviceX/in_steps_debounce_time 1615KernelVersion: 4.0 1616Contact: linux-iio@vger.kernel.org 1617Description: 1618 Specifies number of seconds in which we compute the steps 1619 that occur in order to decide if the consumer is making steps. 1620 1621What: /sys/bus/iio/devices/iio:deviceX/bufferY/watermark 1622KernelVersion: 5.11 1623Contact: linux-iio@vger.kernel.org 1624Description: 1625 A single positive integer specifying the maximum number of scan 1626 elements to wait for. 1627 1628 Poll will block until the watermark is reached. 1629 1630 Blocking read will wait until the minimum between the requested 1631 read amount or the low water mark is available. 1632 1633 Non-blocking read will retrieve the available samples from the 1634 buffer even if there are less samples then watermark level. This 1635 allows the application to block on poll with a timeout and read 1636 the available samples after the timeout expires and thus have a 1637 maximum delay guarantee. 1638 1639What: /sys/bus/iio/devices/iio:deviceX/bufferY/data_available 1640KernelVersion: 5.11 1641Contact: linux-iio@vger.kernel.org 1642Description: 1643 A read-only value indicating the bytes of data available in the 1644 buffer. In the case of an output buffer, this indicates the 1645 amount of empty space available to write data to. In the case of 1646 an input buffer, this indicates the amount of data available for 1647 reading. 1648 1649What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled 1650KernelVersion: 4.2 1651Contact: linux-iio@vger.kernel.org 1652Description: 1653 A read-only boolean value that indicates if the hardware fifo is 1654 currently enabled or disabled. If the device does not have a 1655 hardware fifo this entry is not present. 1656 The hardware fifo is enabled when the buffer is enabled if the 1657 current hardware fifo watermark level is set and other current 1658 device settings allows it (e.g. if a trigger is set that samples 1659 data differently that the hardware fifo does then hardware fifo 1660 will not enabled). 1661 1662 If the hardware fifo is enabled and the level of the hardware 1663 fifo reaches the hardware fifo watermark level the device will 1664 flush its hardware fifo to the device buffer. Doing a non 1665 blocking read on the device when no samples are present in the 1666 device buffer will also force a flush. 1667 1668 When the hardware fifo is enabled there is no need to use a 1669 trigger to use buffer mode since the watermark settings 1670 guarantees that the hardware fifo is flushed to the device 1671 buffer. 1672 1673What: /sys/bus/iio/devices/iio:device*/buffer/hwfifo_timeout 1674KernelVersion: 4.12 1675Contact: linux-iio@vger.kernel.org 1676Description: 1677 A read/write property to provide capability to delay reporting of 1678 samples till a timeout is reached. This allows host processors to 1679 sleep, while the sensor is storing samples in its internal fifo. 1680 The maximum timeout in seconds can be specified by setting 1681 hwfifo_timeout.The current delay can be read by reading 1682 hwfifo_timeout. A value of 0 means that there is no timeout. 1683 1684What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark 1685KernelVersion: 4.2 1686Contact: linux-iio@vger.kernel.org 1687Description: 1688 Read-only entry that contains a single integer specifying the 1689 current watermark level for the hardware fifo. If the device 1690 does not have a hardware fifo this entry is not present. 1691 The watermark level for the hardware fifo is set by the driver 1692 based on the value set by the user in buffer/watermark but 1693 taking into account hardware limitations (e.g. most hardware 1694 buffers are limited to 32-64 samples, some hardware buffers 1695 watermarks are fixed or have minimum levels). A value of 0 1696 means that the hardware watermark is unset. 1697 1698What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min 1699KernelVersion: 4.2 1700Contact: linux-iio@vger.kernel.org 1701Description: 1702 A single positive integer specifying the minimum watermark level 1703 for the hardware fifo of this device. If the device does not 1704 have a hardware fifo this entry is not present. 1705 1706 If the user sets buffer/watermark to a value less than this one, 1707 then the hardware watermark will remain unset. 1708 1709What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max 1710KernelVersion: 4.2 1711Contact: linux-iio@vger.kernel.org 1712Description: 1713 A single positive integer specifying the maximum watermark level 1714 for the hardware fifo of this device. If the device does not 1715 have a hardware fifo this entry is not present. 1716 1717 If the user sets buffer/watermark to a value greater than this 1718 one, then the hardware watermark will be capped at this value. 1719 1720What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available 1721KernelVersion: 4.2 1722Contact: linux-iio@vger.kernel.org 1723Description: 1724 A list of positive integers specifying the available watermark 1725 levels for the hardware fifo. This entry is optional and if it 1726 is not present it means that all the values between 1727 hwfifo_watermark_min and hwfifo_watermark_max are supported. 1728 1729 If the user sets buffer/watermark to a value greater than 1730 hwfifo_watermak_min but not equal to any of the values in this 1731 list, the driver will chose an appropriate value for the 1732 hardware fifo watermark level. 1733 1734What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity 1735What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity 1736What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity 1737What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity 1738KernelVersion: 4.1 1739Contact: linux-iio@vger.kernel.org 1740Description: 1741 The emissivity ratio of the surface in the field of view of the 1742 contactless temperature sensor. Emissivity varies from 0 to 1, 1743 with 1 being the emissivity of a black body. 1744 1745What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio 1746What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio 1747What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio 1748KernelVersion: 4.2 1749Contact: linux-iio@vger.kernel.org 1750Description: 1751 Hardware applied number of measurements for acquiring one 1752 data point. The HW will do <type>[_name]_oversampling_ratio 1753 measurements and return the average value as output data. Each 1754 value resulted from <type>[_name]_oversampling_ratio measurements 1755 is considered as one sample for <type>[_name]_sampling_frequency. 1756 1757What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw 1758What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw 1759What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw 1760What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw 1761What: /sys/bus/iio/devices/iio:deviceX/in_concentration_ethanol_raw 1762What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_ethanol_raw 1763What: /sys/bus/iio/devices/iio:deviceX/in_concentration_h2_raw 1764What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_h2_raw 1765What: /sys/bus/iio/devices/iio:deviceX/in_concentration_o2_raw 1766What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_o2_raw 1767What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw 1768What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw 1769KernelVersion: 4.3 1770Contact: linux-iio@vger.kernel.org 1771Description: 1772 Raw (unscaled no offset etc.) reading of a substance. Units 1773 after application of scale and offset are percents. 1774 1775What: /sys/bus/iio/devices/iio:deviceX/in_resistance_raw 1776What: /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw 1777What: /sys/bus/iio/devices/iio:deviceX/out_resistance_raw 1778What: /sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw 1779KernelVersion: 4.3 1780Contact: linux-iio@vger.kernel.org 1781Description: 1782 Raw (unscaled no offset etc.) resistance reading that can be processed 1783 into an ohm value. 1784 1785What: /sys/bus/iio/devices/iio:deviceX/heater_enable 1786KernelVersion: 4.1.0 1787Contact: linux-iio@vger.kernel.org 1788Description: 1789 '1' (enable) or '0' (disable) specifying the enable 1790 of heater function. Same reading values apply. 1791 1792 This ABI is especially applicable for humidity sensors 1793 to heatup the device and get rid of any condensation 1794 in some humidity environment 1795 1796What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw 1797KernelVersion: 4.5 1798Contact: linux-iio@vger.kernel.org 1799Description: 1800 Raw (unscaled no offset etc.) pH reading of a substance as a negative 1801 base-10 logarithm of hydrodium ions in a litre of water. 1802 1803What: /sys/bus/iio/devices/iio:deviceX/mount_matrix 1804What: /sys/bus/iio/devices/iio:deviceX/in_mount_matrix 1805What: /sys/bus/iio/devices/iio:deviceX/out_mount_matrix 1806What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_mount_matrix 1807What: /sys/bus/iio/devices/iio:deviceX/in_accel_mount_matrix 1808KernelVersion: 4.6 1809Contact: linux-iio@vger.kernel.org 1810Description: 1811 Mounting matrix for IIO sensors. This is a rotation matrix which 1812 informs userspace about sensor chip's placement relative to the 1813 main hardware it is mounted on. 1814 1815 Main hardware placement is defined according to the local 1816 reference frame related to the physical quantity the sensor 1817 measures. 1818 1819 Given that the rotation matrix is defined in a board specific 1820 way (platform data and / or device-tree), the main hardware 1821 reference frame definition is left to the implementor's choice 1822 (see below for a magnetometer example). 1823 1824 Applications should apply this rotation matrix to samples so 1825 that when main hardware reference frame is aligned onto local 1826 reference frame, then sensor chip reference frame is also 1827 perfectly aligned with it. 1828 1829 Matrix is a 3x3 unitary matrix and typically looks like 1830 [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix 1831 [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware 1832 are perfectly aligned with each other. 1833 1834 For example, a mounting matrix for a magnetometer sensor informs 1835 userspace about sensor chip's ORIENTATION relative to the main 1836 hardware. 1837 1838 More specifically, main hardware orientation is defined with 1839 respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where : 1840 1841 * Y is in the ground plane and positive towards magnetic North ; 1842 * X is in the ground plane, perpendicular to the North axis and 1843 positive towards the East ; 1844 * Z is perpendicular to the ground plane and positive upwards. 1845 1846 An implementor might consider that for a hand-held device, a 1847 'natural' orientation would be 'front facing camera at the top'. 1848 The main hardware reference frame could then be described as : 1849 1850 * Y is in the plane of the screen and is positive towards the 1851 top of the screen ; 1852 * X is in the plane of the screen, perpendicular to Y axis, and 1853 positive towards the right hand side of the screen ; 1854 * Z is perpendicular to the screen plane and positive out of the 1855 screen. 1856 1857 Another example for a quadrotor UAV might be : 1858 1859 * Y is in the plane of the propellers and positive towards the 1860 front-view camera; 1861 * X is in the plane of the propellers, perpendicular to Y axis, 1862 and positive towards the starboard side of the UAV ; 1863 * Z is perpendicular to propellers plane and positive upwards. 1864 1865What: /sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw 1866KernelVersion: 4.8 1867Contact: linux-iio@vger.kernel.org 1868Description: 1869 Raw (unscaled no offset etc.) electric conductivity reading that 1870 can be processed to siemens per meter. 1871 1872What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw 1873KernelVersion: 4.10 1874Contact: linux-iio@vger.kernel.org 1875Description: 1876 This interface is deprecated; please use the Counter subsystem. 1877 1878 Raw counter device counts from channel Y. For quadrature 1879 counters, multiplication by an available [Y]_scale results in 1880 the counts of a single quadrature signal phase from channel Y. 1881 1882What: /sys/bus/iio/devices/iio:deviceX/in_indexY_raw 1883KernelVersion: 4.10 1884Contact: linux-iio@vger.kernel.org 1885Description: 1886 This interface is deprecated; please use the Counter subsystem. 1887 1888 Raw counter device index value from channel Y. This attribute 1889 provides an absolute positional reference (e.g. a pulse once per 1890 revolution) which may be used to home positional systems as 1891 required. 1892 1893What: /sys/bus/iio/devices/iio:deviceX/in_count_count_direction_available 1894KernelVersion: 4.12 1895Contact: linux-iio@vger.kernel.org 1896Description: 1897 This interface is deprecated; please use the Counter subsystem. 1898 1899 A list of possible counting directions which are: 1900 1901 - "up" : counter device is increasing. 1902 - "down": counter device is decreasing. 1903 1904What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_direction 1905KernelVersion: 4.12 1906Contact: linux-iio@vger.kernel.org 1907Description: 1908 This interface is deprecated; please use the Counter subsystem. 1909 1910 Raw counter device counters direction for channel Y. 1911 1912What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_label 1913What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_label 1914KernelVersion: 5.8 1915Contact: linux-iio@vger.kernel.org 1916Description: 1917 Optional symbolic label to a device channel. 1918 If a label is defined for this channel add that to the channel 1919 specific attributes. This is useful for userspace to be able to 1920 better identify an individual channel. 1921 1922What: /sys/bus/iio/devices/iio:deviceX/in_phaseY_raw 1923KernelVersion: 4.18 1924Contact: linux-iio@vger.kernel.org 1925Description: 1926 Raw (unscaled) phase difference reading from channel Y 1927 that can be processed to radians. 1928 1929What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm1_input 1930What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm1_input 1931What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm2p5_input 1932What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm2p5_input 1933What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm4_input 1934What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm4_input 1935What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm10_input 1936What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm10_input 1937KernelVersion: 4.22 1938Contact: linux-iio@vger.kernel.org 1939Description: 1940 Mass concentration reading of particulate matter in ug / m3. 1941 pmX consists of particles with aerodynamic diameter less or 1942 equal to X micrometers. 1943 1944What: /sys/bus/iio/devices/iio:deviceX/events/in_illuminance_period_available 1945Date: November 2019 1946KernelVersion: 5.4 1947Contact: linux-iio@vger.kernel.org 1948Description: 1949 List of valid periods (in seconds) for which the light intensity 1950 must be above the threshold level before interrupt is asserted. 1951 1952What: /sys/bus/iio/devices/iio:deviceX/in_filter_notch_center_frequency 1953KernelVersion: 5.5 1954Contact: linux-iio@vger.kernel.org 1955Description: 1956 Center frequency in Hz for a notch filter. Used i.e. for line 1957 noise suppression. 1958 1959What: /sys/bus/iio/devices/iio:deviceX/in_temp_thermocouple_type 1960KernelVersion: 5.5 1961Contact: linux-iio@vger.kernel.org 1962Description: 1963 One of the following thermocouple types: B, E, J, K, N, R, S, T. 1964 1965What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibambient 1966What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibambient 1967KernelVersion: 5.10 1968Contact: linux-iio@vger.kernel.org 1969Description: 1970 Calibrated ambient temperature for object temperature 1971 calculation in milli degrees Celsius. 1972 1973What: /sys/bus/iio/devices/iio:deviceX/in_intensity_x_raw 1974What: /sys/bus/iio/devices/iio:deviceX/in_intensity_y_raw 1975What: /sys/bus/iio/devices/iio:deviceX/in_intensity_z_raw 1976KernelVersion: 5.10 1977Contact: linux-iio@vger.kernel.org 1978Description: 1979 Unscaled light intensity according to CIE 1931/DIN 5033 color space. 1980 Units after application of scale are nano nanowatts per square meter. 1981 1982What: /sys/bus/iio/devices/iio:deviceX/in_anglY_label 1983KernelVersion: 5.12 1984Contact: linux-iio@vger.kernel.org 1985Description: 1986 Optional symbolic label for channel Y. 1987 For Intel hid hinge sensor, the label values are: 1988 hinge, keyboard, screen. It means the three channels 1989 each correspond respectively to hinge angle, keyboard angle, 1990 and screen angle. 1991 1992What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_hysteresis_relative 1993What: /sys/bus/iio/devices/iio:deviceX/in_intensity_hysteresis_relative 1994KernelVersion: 5.12 1995Contact: linux-iio@vger.kernel.org 1996Description: 1997 Specify the percent for light sensor relative to the channel 1998 absolute value that a data field should change before an event 1999 is generated. Units are a percentage of the prior reading. 2000 2001What: /sys/bus/iio/devices/iio:deviceX/calibration_auto_enable 2002Date: June 2020 2003KernelVersion: 5.8 2004Contact: linux-iio@vger.kernel.org 2005Description: 2006 Some sensors have the ability to apply auto calibration at 2007 runtime. For example, it may be necessary to compensate for 2008 contaminant build-up in a measurement chamber or optical 2009 element deterioration that would otherwise lead to sensor drift. 2010 2011 Writing 1 or 0 to this attribute will respectively activate or 2012 deactivate this auto calibration function. 2013 2014 Upon reading, the current status is returned. 2015 2016What: /sys/bus/iio/devices/iio:deviceX/calibration_forced_value 2017Date: June 2020 2018KernelVersion: 5.8 2019Contact: linux-iio@vger.kernel.org 2020Description: 2021 Some sensors have the ability to apply a manual calibration using 2022 a known measurement value, perhaps obtained from an external 2023 reference device. 2024 2025 Writing a value to this function will force such a calibration 2026 change. For the scd30 the value should be from the range 2027 [400 1 2000]. 2028 2029 Note for the scd30 that a valid value may only be obtained once 2030 it is has been written. Until then any read back of this value 2031 should be ignored. As for the scd4x an error will be returned 2032 immediately if the manual calibration has failed. 2033 2034What: /sys/bus/iio/devices/iio:deviceX/calibration_forced_value_available 2035KernelVersion: 5.15 2036Contact: linux-iio@vger.kernel.org 2037Description: 2038 Available range for the forced calibration value, expressed as: 2039 2040 - a range specified as "[min step max]" 2041