Documentation/ABI/testing/sysfs-bus-iio

   1 What:           /sys/bus/iio/devices/iio:deviceX
   2 KernelVersion:  2.6.35
   3 Contact:        linux-iio@vger.kernel.org
   4 Description:
   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
   9 What:           /sys/bus/iio/devices/triggerX
  10 KernelVersion:  2.6.35
  11 Contact:        linux-iio@vger.kernel.org
  12 Description:
  13                 An event driven driver of data capture to an in kernel buffer.
  14                 May be provided by a device driver that also has an IIO device
  15                 based on hardware generated events (e.g. data ready) or
  16                 provided by a separate driver for other hardware (e.g.
  17                 periodic timer, GPIO or high resolution timer).
  18                 Contains trigger type specific elements. These do not
  19                 generalize well and hence are not documented in this file.
  20                 X is the IIO index of the trigger.
  21
  22 What:           /sys/bus/iio/devices/iio:deviceX/buffer
  23 KernelVersion:  2.6.35
  24 Contact:        linux-iio@vger.kernel.org
  25 Description:
  26                 Directory of attributes relating to the buffer for the device.
  27
  28 What:           /sys/bus/iio/devices/iio:deviceX/name
  29 KernelVersion:  2.6.35
  30 Contact:        linux-iio@vger.kernel.org
  31 Description:
  32                 Description of the physical chip / device for device X.
  33                 Typically a part number.
  34
  35 What:           /sys/bus/iio/devices/iio:deviceX/sampling_frequency
  36 What:           /sys/bus/iio/devices/iio:deviceX/buffer/sampling_frequency
  37 What:           /sys/bus/iio/devices/triggerX/sampling_frequency
  38 KernelVersion:  2.6.35
  39 Contact:        linux-iio@vger.kernel.org
  40 Description:
  41                 Some devices have internal clocks.  This parameter sets the
  42                 resulting sampling frequency.  In many devices this
  43                 parameter has an effect on input filters etc. rather than
  44                 simply controlling when the input is sampled.  As this
  45                 effects data ready triggers, hardware buffers and the sysfs
  46                 direct access interfaces, it may be found in any of the
  47                 relevant directories.  If it effects all of the above
  48                 then it is to be found in the base device directory.
  49
  50 What:           /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available
  51 What:           /sys/.../iio:deviceX/buffer/sampling_frequency_available
  52 What:           /sys/bus/iio/devices/triggerX/sampling_frequency_available
  53 KernelVersion:  2.6.35
  54 Contact:        linux-iio@vger.kernel.org
  55 Description:
  56                 When the internal sampling clock can only take a small
  57                 discrete set of values, this file lists those available.
  58
  59 What:           /sys/bus/iio/devices/iio:deviceX/oversampling_ratio
  60 KernelVersion:  2.6.38
  61 Contact:        linux-iio@vger.kernel.org
  62 Description:
  63                 Hardware dependent ADC oversampling. Controls the sampling ratio
  64                 of the digital filter if available.
  65
  66 What:           /sys/bus/iio/devices/iio:deviceX/oversampling_ratio_available
  67 KernelVersion:  2.6.38
  68 Contact:        linux-iio@vger.kernel.org
  69 Description:
  70                 Hardware dependent values supported by the oversampling filter.
  71
  72 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
  73 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
  74 KernelVersion:  2.6.35
  75 Contact:        linux-iio@vger.kernel.org
  76 Description:
  77                 Raw (unscaled no bias removal etc.) voltage measurement from
  78                 channel Y. In special cases where the channel does not
  79                 correspond to externally available input one of the named
  80                 versions may be used. The number must always be specified and
  81                 unique to allow association with event codes. Units after
  82                 application of scale and offset are microvolts.
  83
  84 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
  85 KernelVersion:  2.6.35
  86 Contact:        linux-iio@vger.kernel.org
  87 Description:
  88                 Raw (unscaled) differential voltage measurement equivalent to
  89                 channel Y - channel Z where these channel numbers apply to the
  90                 physically equivalent inputs when non differential readings are
  91                 separately available. In differential only parts, then all that
  92                 is required is a consistent labeling.  Units after application
  93                 of scale and offset are microvolts.
  94
  95 What:           /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
  96 KernelVersion:  3.2
  97 Contact:        linux-iio@vger.kernel.org
  98 Description:
  99                 Raw capacitance measurement from channel Y. Units after
 100                 application of scale and offset are nanofarads.
 101
 102 What:           /sys/.../iio:deviceX/in_capacitanceY-in_capacitanceZ_raw
 103 KernelVersion:  3.2
 104 Contact:        linux-iio@vger.kernel.org
 105 Description:
 106                 Raw differential capacitance measurement equivalent to
 107                 channel Y - channel Z where these channel numbers apply to the
 108                 physically equivalent inputs when non differential readings are
 109                 separately available. In differential only parts, then all that
 110                 is required is a consistent labeling.  Units after application
 111                 of scale and offset are nanofarads.
 112
 113 What:           /sys/bus/iio/devices/iio:deviceX/in_temp_raw
 114 What:           /sys/bus/iio/devices/iio:deviceX/in_tempX_raw
 115 What:           /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw
 116 What:           /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw
 117 What:           /sys/bus/iio/devices/iio:deviceX/in_temp_z_raw
 118 KernelVersion:  2.6.35
 119 Contact:        linux-iio@vger.kernel.org
 120 Description:
 121                 Raw (unscaled no bias removal etc.) temperature measurement.
 122                 If an axis is specified it generally means that the temperature
 123                 sensor is associated with one part of a compound device (e.g.
 124                 a gyroscope axis). Units after application of scale and offset
 125                 are milli degrees Celsius.
 126
 127 What:           /sys/bus/iio/devices/iio:deviceX/in_tempX_input
 128 KernelVersion:  2.6.38
 129 Contact:        linux-iio@vger.kernel.org
 130 Description:
 131                 Scaled temperature measurement in milli degrees Celsius.
 132
 133 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw
 134 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw
 135 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw
 136 KernelVersion:  2.6.35
 137 Contact:        linux-iio@vger.kernel.org
 138 Description:
 139                 Acceleration in direction x, y or z (may be arbitrarily assigned
 140                 but should match other such assignments on device).
 141                 Has all of the equivalent parameters as per voltageY. Units
 142                 after application of scale and offset are m/s^2.
 143
 144 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw
 145 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
 146 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
 147 KernelVersion:  2.6.35
 148 Contact:        linux-iio@vger.kernel.org
 149 Description:
 150                 Angular velocity about axis x, y or z (may be arbitrarily
 151                 assigned). Has all the equivalent parameters as per voltageY.
 152                 Units after application of scale and offset are radians per
 153                 second.
 154
 155 What:           /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw
 156 What:           /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw
 157 What:           /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw
 158 KernelVersion:  2.6.35
 159 Contact:        linux-iio@vger.kernel.org
 160 Description:
 161                 Inclination raw reading about axis x, y or z (may be
 162                 arbitrarily assigned). Data converted by application of offset
 163                 and scale to degrees.
 164
 165 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
 166 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
 167 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw
 168 KernelVersion:  2.6.35
 169 Contact:        linux-iio@vger.kernel.org
 170 Description:
 171                 Magnetic field along axis x, y or z (may be arbitrarily
 172                 assigned).  Data converted by application of offset
 173                 then scale to Gauss.
 174
 175 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw
 176 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw
 177 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw
 178 KernelVersion:  2.6.36
 179 Contact:        linux-iio@vger.kernel.org
 180 Description:
 181                 Highest value since some reset condition.  These
 182                 attributes allow access to this and are otherwise
 183                 the direct equivalent of the <type>Y[_name]_raw attributes.
 184
 185 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw
 186 KernelVersion:  2.6.36
 187 Contact:        linux-iio@vger.kernel.org
 188 Description:
 189                 A computed peak value based on the sum squared magnitude of
 190                 the underlying value in the specified directions.
 191
 192 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_offset
 193 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
 194 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
 195 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
 196 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
 197 What:           /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
 198 What:           /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
 199 What:           /sys/bus/iio/devices/iio:deviceX/in_temp_offset
 200 KernelVersion:  2.6.35
 201 Contact:        linux-iio@vger.kernel.org
 202 Description:
 203                 If known for a device, offset to be added to <type>[Y]_raw prior
 204                 to scaling by <type>[Y]_scale in order to obtain value in the
 205                 <type> units as specified in <type>[Y]_raw documentation.
 206                 Not present if the offset is always 0 or unknown. If Y or
 207                 axis <x|y|z> is not present, then the offset applies to all
 208                 in channels of <type>.
 209                 May be writable if a variable offset can be applied on the
 210                 device. Note that this is different to calibbias which
 211                 is for devices (or drivers) that apply offsets to compensate
 212                 for variation between different instances of the part, typically
 213                 adjusted by using some hardware supported calibration procedure.
 214                 Calibbias is applied internally, offset is applied in userspace
 215                 to the _raw output.
 216
 217 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
 218 What:           /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
 219 What:           /sys/bus/iio/devices/iio:deviceX/in_voltage_scale
 220 What:           /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
 221 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
 222 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_scale
 223 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
 224 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
 225 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_scale
 226 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
 227 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
 228 What:           /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
 229 KernelVersion:  2.6.35
 230 Contact:        linux-iio@vger.kernel.org
 231 Description:
 232                 If known for a device, scale to be applied to <type>Y[_name]_raw
 233                 post addition of <type>[Y][_name]_offset in order to obtain the
 234                 measured value in <type> units as specified in
 235                 <type>[Y][_name]_raw documentation.  If shared across all in
 236                 channels then Y and <x|y|z> are not present and the value is
 237                 called <type>[Y][_name]_scale. The peak modifier means this
 238                 value is applied to <type>Y[_name]_peak_raw values.
 239
 240 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias
 241 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias
 242 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
 243 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
 244 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
 245 What:           /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
 246 What:           /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
 247 What:           /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
 248 KernelVersion:  2.6.35
 249 Contact:        linux-iio@vger.kernel.org
 250 Description:
 251                 Hardware applied calibration offset (assumed to fix production
 252                 inaccuracies).
 253
 254 What            /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
 255 What            /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
 256 What            /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
 257 What            /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
 258 What            /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
 259 What            /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
 260 What            /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
 261 What            /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
 262 What            /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
 263 what            /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
 264 what            /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
 265 KernelVersion:  2.6.35
 266 Contact:        linux-iio@vger.kernel.org
 267 Description:
 268                 Hardware applied calibration scale factor (assumed to fix
 269                 production inaccuracies).  If shared across all channels,
 270                 <type>_calibscale is used.
 271
 272 What:           /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
 273 What:           /sys/.../iio:deviceX/in_voltageX_scale_available
 274 What:           /sys/.../iio:deviceX/in_voltage-voltage_scale_available
 275 What:           /sys/.../iio:deviceX/out_voltageX_scale_available
 276 What:           /sys/.../iio:deviceX/out_altvoltageX_scale_available
 277 What:           /sys/.../iio:deviceX/in_capacitance_scale_available
 278 KernelVersion:  2.6.35
 279 Contact:        linux-iio@vger.kernel.org
 280 Description:
 281                 If a discrete set of scale values is available, they
 282                 are listed in this attribute.
 283
 284 What            /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain
 285 KernelVersion:  2.6.35
 286 Contact:        linux-iio@vger.kernel.org
 287 Description:
 288                 Hardware applied gain factor. If shared across all channels,
 289                 <type>_hardwaregain is used.
 290
 291 What:           /sys/.../in_accel_filter_low_pass_3db_frequency
 292 What:           /sys/.../in_magn_filter_low_pass_3db_frequency
 293 What:           /sys/.../in_anglvel_filter_low_pass_3db_frequency
 294 KernelVersion:  3.2
 295 Contact:        linux-iio@vger.kernel.org
 296 Description:
 297                 If a known or controllable low pass filter is applied
 298                 to the underlying data channel, then this parameter
 299                 gives the 3dB frequency of the filter in Hz.
 300
 301 What:           /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
 302 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
 303 KernelVersion:  2.6.37
 304 Contact:        linux-iio@vger.kernel.org
 305 Description:
 306                 Raw (unscaled, no bias etc.) output voltage for
 307                 channel Y.  The number must always be specified and
 308                 unique if the output corresponds to a single channel.
 309                 While DAC like devices typically use out_voltage,
 310                 a continuous frequency generating device, such as
 311                 a DDS or PLL should use out_altvoltage.
 312
 313 What:           /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
 314 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
 315 KernelVersion:  2.6.37
 316 Contact:        linux-iio@vger.kernel.org
 317 Description:
 318                 Raw (unscaled, no bias etc.) output voltage for an aggregate of
 319                 channel Y, channel Z, etc.  This interface is available in cases
 320                 where a single output sets the value for multiple channels
 321                 simultaneously.
 322
 323 What:           /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
 324 What:           /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
 325 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
 326 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
 327 KernelVersion:  2.6.38
 328 Contact:        linux-iio@vger.kernel.org
 329 Description:
 330                 Specifies the output powerdown mode.
 331                 DAC output stage is disconnected from the amplifier and
 332                 1kohm_to_gnd: connected to ground via an 1kOhm resistor,
 333                 6kohm_to_gnd: connected to ground via a 6kOhm resistor,
 334                 20kohm_to_gnd: connected to ground via a 20kOhm resistor,
 335                 100kohm_to_gnd: connected to ground via an 100kOhm resistor,
 336                 three_state: left floating.
 337                 For a list of available output power down options read
 338                 outX_powerdown_mode_available. If Y is not present the
 339                 mode is shared across all outputs.
 340
 341 What:           /sys/.../iio:deviceX/out_votlageY_powerdown_mode_available
 342 What:           /sys/.../iio:deviceX/out_voltage_powerdown_mode_available
 343 What:           /sys/.../iio:deviceX/out_altvotlageY_powerdown_mode_available
 344 What:           /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
 345 KernelVersion:  2.6.38
 346 Contact:        linux-iio@vger.kernel.org
 347 Description:
 348                 Lists all available output power down modes.
 349                 If Y is not present the mode is shared across all outputs.
 350
 351 What:           /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
 352 What:           /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
 353 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
 354 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
 355 KernelVersion:  2.6.38
 356 Contact:        linux-iio@vger.kernel.org
 357 Description:
 358                 Writing 1 causes output Y to enter the power down mode specified
 359                 by the corresponding outY_powerdown_mode. DAC output stage is
 360                 disconnected from the amplifier. Clearing returns to normal
 361                 operation. Y may be suppressed if all outputs are controlled
 362                 together.
 363
 364 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
 365 KernelVersion:  3.4.0
 366 Contact:        linux-iio@vger.kernel.org
 367 Description:
 368                 Output frequency for channel Y in Hz. The number must always be
 369                 specified and unique if the output corresponds to a single
 370                 channel.
 371
 372 What:           /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
 373 KernelVersion:  3.4.0
 374 Contact:        linux-iio@vger.kernel.org
 375 Description:
 376                 Phase in radians of one frequency/clock output Y
 377                 (out_altvoltageY) relative to another frequency/clock output
 378                 (out_altvoltageZ) of the device X. The number must always be
 379                 specified and unique if the output corresponds to a single
 380                 channel.
 381
 382 What:           /sys/bus/iio/devices/iio:deviceX/events
 383 KernelVersion:  2.6.35
 384 Contact:        linux-iio@vger.kernel.org
 385 Description:
 386                 Configuration of which hardware generated events are passed up
 387                 to user-space.
 388
 389 What:           /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en
 390 What:           /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en
 391 What:           /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en
 392 What:           /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en
 393 What:           /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en
 394 What:           /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en
 395 What:           /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en
 396 What:           /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en
 397 What:           /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en
 398 What:           /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en
 399 What:           /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en
 400 What:           /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en
 401 What:           /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en
 402 What:           /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en
 403 What:           /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
 404 What:           /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
 405 What:           /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
 406 What:           /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
 407 What:           /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
 408 What:           /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
 409 What:           /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
 410 What:           /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en
 411 What:           /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en
 412 What:           /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en
 413 KernelVersion:  2.6.37
 414 Contact:        linux-iio@vger.kernel.org
 415 Description:
 416                 Event generated when channel passes a threshold in the specified
 417                 (_rising|_falling) direction. If the direction is not specified,
 418                 then either the device will report an event which ever direction
 419                 a single threshold value is passed in (e.g.
 420                 <type>[Y][_name]_<raw|input>_thresh_value) or
 421                 <type>[Y][_name]_<raw|input>_thresh_rising_value and
 422                 <type>[Y][_name]_<raw|input>_thresh_falling_value may take
 423                 different values, but the device can only enable both thresholds
 424                 or neither.
 425                 Note the driver will assume the last p events requested are
 426                 to be enabled where p is how many it supports (which may vary
 427                 depending on the exact set requested. So if you want to be
 428                 sure you have set what you think you have, check the contents of
 429                 these attributes after everything is configured. Drivers may
 430                 have to buffer any parameters so that they are consistent when
 431                 a given event type is enabled at a future point (and not those for
 432                 whatever event was previously enabled).
 433
 434 What:           /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en
 435 What:           /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en
 436 What:           /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en
 437 What:           /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en
 438 What:           /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en
 439 What:           /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en
 440 What:           /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en
 441 What:           /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en
 442 What:           /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en
 443 What:           /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en
 444 What:           /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en
 445 What:           /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en
 446 What:           /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en
 447 What:           /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en
 448 What:           /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
 449 What:           /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
 450 What:           /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
 451 What:           /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
 452 What:           /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
 453 What:           /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
 454 What:           /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
 455 What:           /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en
 456 What:           /sys/.../iio:deviceX/events/in_tempY_roc_rising_en
 457 What:           /sys/.../iio:deviceX/events/in_tempY_roc_falling_en
 458 KernelVersion:  2.6.37
 459 Contact:        linux-iio@vger.kernel.org
 460 Description:
 461                 Event generated when channel passes a threshold on the rate of
 462                 change (1st differential) in the specified (_rising|_falling)
 463                 direction. If the direction is not specified, then either the
 464                 device will report an event which ever direction a single
 465                 threshold value is passed in (e.g.
 466                 <type>[Y][_name]_<raw|input>_roc_value) or
 467                 <type>[Y][_name]_<raw|input>_roc_rising_value and
 468                 <type>[Y][_name]_<raw|input>_roc_falling_value may take
 469                 different values, but the device can only enable both rate of
 470                 change thresholds or neither.
 471                 Note the driver will assume the last p events requested are
 472                 to be enabled where p is however many it supports (which may
 473                 vary depending on the exact set requested. So if you want to be
 474                 sure you have set what you think you have, check the contents of
 475                 these attributes after everything is configured. Drivers may
 476                 have to buffer any parameters so that they are consistent when
 477                 a given event type is enabled a future point (and not those for
 478                 whatever event was previously enabled).
 479
 480 What:           /sys/.../events/in_accel_x_raw_thresh_rising_value
 481 What:           /sys/.../events/in_accel_x_raw_thresh_falling_value
 482 What:           /sys/.../events/in_accel_y_raw_thresh_rising_value
 483 What:           /sys/.../events/in_accel_y_raw_thresh_falling_value
 484 What:           /sys/.../events/in_accel_z_raw_thresh_rising_value
 485 What:           /sys/.../events/in_accel_z_raw_thresh_falling_value
 486 What:           /sys/.../events/in_anglvel_x_raw_thresh_rising_value
 487 What:           /sys/.../events/in_anglvel_x_raw_thresh_falling_value
 488 What:           /sys/.../events/in_anglvel_y_raw_thresh_rising_value
 489 What:           /sys/.../events/in_anglvel_y_raw_thresh_falling_value
 490 What:           /sys/.../events/in_anglvel_z_raw_thresh_rising_value
 491 What:           /sys/.../events/in_anglvel_z_raw_thresh_falling_value
 492 What:           /sys/.../events/in_magn_x_raw_thresh_rising_value
 493 What:           /sys/.../events/in_magn_x_raw_thresh_falling_value
 494 What:           /sys/.../events/in_magn_y_raw_thresh_rising_value
 495 What:           /sys/.../events/in_magn_y_raw_thresh_falling_value
 496 What:           /sys/.../events/in_magn_z_raw_thresh_rising_value
 497 What:           /sys/.../events/in_magn_z_raw_thresh_falling_value
 498 What:           /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
 499 What:           /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
 500 What:           /sys/.../events/in_voltageY_raw_thresh_rising_value
 501 What:           /sys/.../events/in_voltageY_raw_thresh_falling_value
 502 What:           /sys/.../events/in_tempY_raw_thresh_rising_value
 503 What:           /sys/.../events/in_tempY_raw_thresh_falling_value
 504 What:           /sys/.../events/in_illuminance0_thresh_falling_value
 505 what:           /sys/.../events/in_illuminance0_thresh_rising_value
 506 what:           /sys/.../events/in_proximity0_thresh_falling_value
 507 what:           /sys/.../events/in_proximity0_thresh_rising_value
 508 KernelVersion:  2.6.37
 509 Contact:        linux-iio@vger.kernel.org
 510 Description:
 511                 Specifies the value of threshold that the device is comparing
 512                 against for the events enabled by
 513                 <type>Y[_name]_thresh[_rising|falling]_en.
 514                 If separate attributes exist for the two directions, but
 515                 direction is not specified for this attribute, then a single
 516                 threshold value applies to both directions.
 517                 The raw or input element of the name indicates whether the
 518                 value is in raw device units or in processed units (as _raw
 519                 and _input do on sysfs direct channel read attributes).
 520
 521 What:           /sys/.../events/in_accel_x_raw_roc_rising_value
 522 What:           /sys/.../events/in_accel_x_raw_roc_falling_value
 523 What:           /sys/.../events/in_accel_y_raw_roc_rising_value
 524 What:           /sys/.../events/in_accel_y_raw_roc_falling_value
 525 What:           /sys/.../events/in_accel_z_raw_roc_rising_value
 526 What:           /sys/.../events/in_accel_z_raw_roc_falling_value
 527 What:           /sys/.../events/in_anglvel_x_raw_roc_rising_value
 528 What:           /sys/.../events/in_anglvel_x_raw_roc_falling_value
 529 What:           /sys/.../events/in_anglvel_y_raw_roc_rising_value
 530 What:           /sys/.../events/in_anglvel_y_raw_roc_falling_value
 531 What:           /sys/.../events/in_anglvel_z_raw_roc_rising_value
 532 What:           /sys/.../events/in_anglvel_z_raw_roc_falling_value
 533 What:           /sys/.../events/in_magn_x_raw_roc_rising_value
 534 What:           /sys/.../events/in_magn_x_raw_roc_falling_value
 535 What:           /sys/.../events/in_magn_y_raw_roc_rising_value
 536 What:           /sys/.../events/in_magn_y_raw_roc_falling_value
 537 What:           /sys/.../events/in_magn_z_raw_roc_rising_value
 538 What:           /sys/.../events/in_magn_z_raw_roc_falling_value
 539 What:           /sys/.../events/in_voltageY_supply_raw_roc_rising_value
 540 What:           /sys/.../events/in_voltageY_supply_raw_roc_falling_value
 541 What:           /sys/.../events/in_voltageY_raw_roc_rising_value
 542 What:           /sys/.../events/in_voltageY_raw_roc_falling_value
 543 What:           /sys/.../events/in_tempY_raw_roc_rising_value
 544 What:           /sys/.../events/in_tempY_raw_roc_falling_value
 545 KernelVersion:  2.6.37
 546 Contact:        linux-iio@vger.kernel.org
 547 Description:
 548                 Specifies the value of rate of change threshold that the
 549                 device is comparing against for the events enabled by
 550                 <type>[Y][_name]_roc[_rising|falling]_en.
 551                 If separate attributes exist for the two directions,
 552                 but direction is not specified for this attribute,
 553                 then a single threshold value applies to both directions.
 554                 The raw or input element of the name indicates whether the
 555                 value is in raw device units or in processed units (as _raw
 556                 and _input do on sysfs direct channel read attributes).
 557
 558 What:           /sys/.../events/in_accel_x_thresh_rising_period
 559 What:           /sys/.../events/in_accel_x_thresh_falling_period
 560 hat:            /sys/.../events/in_accel_x_roc_rising_period
 561 What:           /sys/.../events/in_accel_x_roc_falling_period
 562 What:           /sys/.../events/in_accel_y_thresh_rising_period
 563 What:           /sys/.../events/in_accel_y_thresh_falling_period
 564 What:           /sys/.../events/in_accel_y_roc_rising_period
 565 What:           /sys/.../events/in_accel_y_roc_falling_period
 566 What:           /sys/.../events/in_accel_z_thresh_rising_period
 567 What:           /sys/.../events/in_accel_z_thresh_falling_period
 568 What:           /sys/.../events/in_accel_z_roc_rising_period
 569 What:           /sys/.../events/in_accel_z_roc_falling_period
 570 What:           /sys/.../events/in_anglvel_x_thresh_rising_period
 571 What:           /sys/.../events/in_anglvel_x_thresh_falling_period
 572 What:           /sys/.../events/in_anglvel_x_roc_rising_period
 573 What:           /sys/.../events/in_anglvel_x_roc_falling_period
 574 What:           /sys/.../events/in_anglvel_y_thresh_rising_period
 575 What:           /sys/.../events/in_anglvel_y_thresh_falling_period
 576 What:           /sys/.../events/in_anglvel_y_roc_rising_period
 577 What:           /sys/.../events/in_anglvel_y_roc_falling_period
 578 What:           /sys/.../events/in_anglvel_z_thresh_rising_period
 579 What:           /sys/.../events/in_anglvel_z_thresh_falling_period
 580 What:           /sys/.../events/in_anglvel_z_roc_rising_period
 581 What:           /sys/.../events/in_anglvel_z_roc_falling_period
 582 What:           /sys/.../events/in_magn_x_thresh_rising_period
 583 What:           /sys/.../events/in_magn_x_thresh_falling_period
 584 What:           /sys/.../events/in_magn_x_roc_rising_period
 585 What:           /sys/.../events/in_magn_x_roc_falling_period
 586 What:           /sys/.../events/in_magn_y_thresh_rising_period
 587 What:           /sys/.../events/in_magn_y_thresh_falling_period
 588 What:           /sys/.../events/in_magn_y_roc_rising_period
 589 What:           /sys/.../events/in_magn_y_roc_falling_period
 590 What:           /sys/.../events/in_magn_z_thresh_rising_period
 591 What:           /sys/.../events/in_magn_z_thresh_falling_period
 592 What:           /sys/.../events/in_magn_z_roc_rising_period
 593 What:           /sys/.../events/in_magn_z_roc_falling_period
 594 What:           /sys/.../events/in_voltageY_supply_thresh_rising_period
 595 What:           /sys/.../events/in_voltageY_supply_thresh_falling_period
 596 What:           /sys/.../events/in_voltageY_supply_roc_rising_period
 597 What:           /sys/.../events/in_voltageY_supply_roc_falling_period
 598 What:           /sys/.../events/in_voltageY_thresh_rising_period
 599 What:           /sys/.../events/in_voltageY_thresh_falling_period
 600 What:           /sys/.../events/in_voltageY_roc_rising_period
 601 What:           /sys/.../events/in_voltageY_roc_falling_period
 602 What:           /sys/.../events/in_tempY_thresh_rising_period
 603 What:           /sys/.../events/in_tempY_thresh_falling_period
 604 What:           /sys/.../events/in_tempY_roc_rising_period
 605 What:           /sys/.../events/in_tempY_roc_falling_period
 606 What:           /sys/.../events/in_accel_x&y&z_mag_falling_period
 607 What:           /sys/.../events/in_intensity0_thresh_period
 608 What:           /sys/.../events/in_proximity0_thresh_period
 609 KernelVersion:  2.6.37
 610 Contact:        linux-iio@vger.kernel.org
 611 Description:
 612                 Period of time (in seconds) for which the condition must be
 613                 met before an event is generated. If direction is not
 614                 specified then this period applies to both directions.
 615
 616 What:           /sys/.../iio:deviceX/events/in_accel_mag_en
 617 What:           /sys/.../iio:deviceX/events/in_accel_mag_rising_en
 618 What:           /sys/.../iio:deviceX/events/in_accel_mag_falling_en
 619 What:           /sys/.../iio:deviceX/events/in_accel_x_mag_en
 620 What:           /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en
 621 What:           /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en
 622 What:           /sys/.../iio:deviceX/events/in_accel_y_mag_en
 623 What:           /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en
 624 What:           /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en
 625 What:           /sys/.../iio:deviceX/events/in_accel_z_mag_en
 626 What:           /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en
 627 What:           /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en
 628 What:           /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en
 629 What:           /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en
 630 KernelVersion:  2.6.37
 631 Contact:        linux-iio@vger.kernel.org
 632 Description:
 633                 Similar to in_accel_x_thresh[_rising|_falling]_en, but here the
 634                 magnitude of the channel is compared to the threshold, not its
 635                 signed value.
 636
 637 What:           /sys/.../events/in_accel_raw_mag_value
 638 What:           /sys/.../events/in_accel_x_raw_mag_rising_value
 639 What:           /sys/.../events/in_accel_y_raw_mag_rising_value
 640 What:           /sys/.../events/in_accel_z_raw_mag_rising_value
 641 KernelVersion:  2.6.37
 642 Contact:        linux-iio@vger.kernel.org
 643 Description:
 644                 The value to which the magnitude of the channel is compared. If
 645                 number or direction is not specified, applies to all channels of
 646                 this type.
 647
 648 What:           /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
 649 KernelVersion:  2.6.35
 650 Contact:        linux-iio@vger.kernel.org
 651 Description:
 652                 The name of the trigger source being used, as per string given
 653                 in /sys/class/iio/triggerY/name.
 654
 655 What:           /sys/bus/iio/devices/iio:deviceX/buffer/length
 656 KernelVersion:  2.6.35
 657 Contact:        linux-iio@vger.kernel.org
 658 Description:
 659                 Number of scans contained by the buffer.
 660
 661 What:           /sys/bus/iio/devices/iio:deviceX/buffer/bytes_per_datum
 662 KernelVersion:  2.6.37
 663 Contact:        linux-iio@vger.kernel.org
 664 Description:
 665                 Bytes per scan.  Due to alignment fun, the scan may be larger
 666                 than implied directly by the scan_element parameters.
 667
 668 What:           /sys/bus/iio/devices/iio:deviceX/buffer/enable
 669 KernelVersion:  2.6.35
 670 Contact:        linux-iio@vger.kernel.org
 671 Description:
 672                 Actually start the buffer capture up.  Will start trigger
 673                 if first device and appropriate.
 674
 675 What:           /sys/bus/iio/devices/iio:deviceX/buffer/scan_elements
 676 KernelVersion:  2.6.37
 677 Contact:        linux-iio@vger.kernel.org
 678 Description:
 679                 Directory containing interfaces for elements that will be
 680                 captured for a single triggered sample set in the buffer.
 681
 682 What:           /sys/.../buffer/scan_elements/in_accel_x_en
 683 What:           /sys/.../buffer/scan_elements/in_accel_y_en
 684 What:           /sys/.../buffer/scan_elements/in_accel_z_en
 685 What:           /sys/.../buffer/scan_elements/in_anglvel_x_en
 686 What:           /sys/.../buffer/scan_elements/in_anglvel_y_en
 687 What:           /sys/.../buffer/scan_elements/in_anglvel_z_en
 688 What:           /sys/.../buffer/scan_elements/in_magn_x_en
 689 What:           /sys/.../buffer/scan_elements/in_magn_y_en
 690 What:           /sys/.../buffer/scan_elements/in_magn_z_en
 691 What:           /sys/.../buffer/scan_elements/in_timestamp_en
 692 What:           /sys/.../buffer/scan_elements/in_voltageY_supply_en
 693 What:           /sys/.../buffer/scan_elements/in_voltageY_en
 694 What:           /sys/.../buffer/scan_elements/in_voltageY-voltageZ_en
 695 What:           /sys/.../buffer/scan_elements/in_incli_x_en
 696 What:           /sys/.../buffer/scan_elements/in_incli_y_en
 697 KernelVersion:  2.6.37
 698 Contact:        linux-iio@vger.kernel.org
 699 Description:
 700                 Scan element control for triggered data capture.
 701
 702 What:           /sys/.../buffer/scan_elements/in_accel_type
 703 What:           /sys/.../buffer/scan_elements/in_anglvel_type
 704 What:           /sys/.../buffer/scan_elements/in_magn_type
 705 What:           /sys/.../buffer/scan_elements/in_incli_type
 706 What:           /sys/.../buffer/scan_elements/in_voltageY_type
 707 What:           /sys/.../buffer/scan_elements/in_voltage_type
 708 What:           /sys/.../buffer/scan_elements/in_voltageY_supply_type
 709 What:           /sys/.../buffer/scan_elements/in_timestamp_type
 710 KernelVersion:  2.6.37
 711 Contact:        linux-iio@vger.kernel.org
 712 Description:
 713                 Description of the scan element data storage within the buffer
 714                 and hence the form in which it is read from user-space.
 715                 Form is [be|le]:[s|u]bits/storagebits[>>shift].
 716                 be or le specifies big or little endian. s or u specifies if
 717                 signed (2's complement) or unsigned. bits is the number of bits
 718                 of data and storagebits is the space (after padding) that it
 719                 occupies in the buffer. shift if specified, is the shift that
 720                 needs to be applied prior to masking out unused bits. Some
 721                 devices put their data in the middle of the transferred elements
 722                 with additional information on both sides.  Note that some
 723                 devices will have additional information in the unused bits
 724                 so to get a clean value, the bits value must be used to mask
 725                 the buffer output value appropriately.  The storagebits value
 726                 also specifies the data alignment.  So s48/64>>2 will be a
 727                 signed 48 bit integer stored in a 64 bit location aligned to
 728                 a 64 bit boundary. To obtain the clean value, shift right 2
 729                 and apply a mask to zero the top 16 bits of the result.
 730                 For other storage combinations this attribute will be extended
 731                 appropriately.
 732
 733 What:           /sys/.../buffer/scan_elements/in_accel_type_available
 734 KernelVersion:  2.6.37
 735 Contact:        linux-iio@vger.kernel.org
 736 Description:
 737                 If the type parameter can take one of a small set of values,
 738                 this attribute lists them.
 739
 740 What:           /sys/.../buffer/scan_elements/in_voltageY_index
 741 What:           /sys/.../buffer/scan_elements/in_voltageY_supply_index
 742 What:           /sys/.../buffer/scan_elements/in_accel_x_index
 743 What:           /sys/.../buffer/scan_elements/in_accel_y_index
 744 What:           /sys/.../buffer/scan_elements/in_accel_z_index
 745 What:           /sys/.../buffer/scan_elements/in_anglvel_x_index
 746 What:           /sys/.../buffer/scan_elements/in_anglvel_y_index
 747 What:           /sys/.../buffer/scan_elements/in_anglvel_z_index
 748 What:           /sys/.../buffer/scan_elements/in_magn_x_index
 749 What:           /sys/.../buffer/scan_elements/in_magn_y_index
 750 What:           /sys/.../buffer/scan_elements/in_magn_z_index
 751 What:           /sys/.../buffer/scan_elements/in_incli_x_index
 752 What:           /sys/.../buffer/scan_elements/in_incli_y_index
 753 What:           /sys/.../buffer/scan_elements/in_timestamp_index
 754 KernelVersion:  2.6.37
 755 Contact:        linux-iio@vger.kernel.org
 756 Description:
 757                 A single positive integer specifying the position of this
 758                 scan element in the buffer. Note these are not dependent on
 759                 what is enabled and may not be contiguous. Thus for user-space
 760                 to establish the full layout these must be used in conjunction
 761                 with all _en attributes to establish which channels are present,
 762                 and the relevant _type attributes to establish the data storage
 763                 format.
 764
 765 What:           /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
 766 KernelVersion:  2.6.38
 767 Contact:        linux-iio@vger.kernel.org
 768 Description:
 769                 This attribute is used to read the amount of quadrature error
 770                 present in the device at a given time.