drivers/staging/iio/Documentation/sysfs-bus-iio

   1 What:           /sys/bus/iio/devices/deviceX
   2 KernelVersion:  2.6.35
   3 Contact:        linux-iio@vger.kernel.org
   4 Description:
   5                 Hardware chip or device accessed by on 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/deviceX:buffer
  23 KernelVersion:  2.6.35
  24 Contact:        linux-iio@vger.kernel.org
  25 Description:
  26                 Link to /sys/class/iio/deviceX/deviceX:buffer. X indicates
  27                 the device with which this buffer buffer is associated.
  28
  29 What:           /sys/bus/iio/devices/deviceX/name
  30 KernelVersion:  2.6.35
  31 Contact:        linux-iio@vger.kernel.org
  32 Description:
  33                 Description of the physical chip / device for device X.
  34                 Typically a part number.
  35
  36 What:           /sys/bus/iio/devices/deviceX/sampling_frequency
  37 KernelVersion:  2.6.35
  38 Contact:        linux-iio@vger.kernel.org
  39 Description:
  40                 Some devices have internal clocks.  This parameter sets the
  41                 resulting sampling frequency.  In many devices this
  42                 parameter has an effect on input filters etc rather than
  43                 simply controlling when the input is sampled.  As this
  44                 effects datardy triggers, hardware buffers and the sysfs
  45                 direct access interfaces, it may be found in any of the
  46                 relevant directories.  If it effects all of the above
  47                 then it is to be found in the base device directory as here.
  48
  49 What:           /sys/bus/iio/devices/deviceX/sampling_frequency_available
  50 KernelVersion:  2.6.35
  51 Contact:        linux-iio@vger.kernel.org
  52 Description:
  53                 When the internal sampling clock can only take a small
  54                 discrete set of values, this file lists those available.
  55
  56 What:           /sys/bus/iio/devices/deviceX/range
  57 KernelVersion:  2.6.38
  58 Contact:        linux-iio@vger.kernel.org
  59 Description:
  60                 Hardware dependent ADC Full Scale Range in mVolt.
  61
  62 What:           /sys/bus/iio/devices/deviceX/range_available
  63 KernelVersion:  2.6.38
  64 Contact:        linux-iio@vger.kernel.org
  65 Description:
  66                 Hardware dependent supported vales for ADC Full Scale Range.
  67
  68 What:           /sys/bus/iio/devices/deviceX/oversampling_ratio
  69 KernelVersion:  2.6.38
  70 Contact:        linux-iio@vger.kernel.org
  71 Description:
  72                 Hardware dependent ADC oversampling. Controls the sampling ratio
  73                 of the digital filter if available.
  74
  75 What:           /sys/bus/iio/devices/deviceX/oversampling_ratio_available
  76 KernelVersion:  2.6.38
  77 Contact:        linux-iio@vger.kernel.org
  78 Description:
  79                 Hardware dependent values supported by the oversampling filter.
  80
  81 What:           /sys/bus/iio/devices/deviceX/inY_raw
  82 What:           /sys/bus/iio/devices/deviceX/inY_supply_raw
  83 KernelVersion:  2.6.35
  84 Contact:        linux-iio@vger.kernel.org
  85 Description:
  86                 Raw (unscaled no bias removal etc) voltage measurement from
  87                 channel Y. In special cases where the channel does not
  88                 correspond to externally available input one of the named
  89                 versions may be used. The number must always be specified and
  90                 unique to allow association with event codes.
  91
  92 What:           /sys/bus/iio/devices/deviceX/inY-inZ_raw
  93 KernelVersion:  2.6.35
  94 Contact:        linux-iio@vger.kernel.org
  95 Description:
  96                 Raw (unscaled) differential voltage measurement equivalent to
  97                 channel Y - channel Z where these channel numbers apply to the
  98                 physically equivalent inputs when non differential readings are
  99                 separately available. In differential only parts, then all that
 100                 is required is a consistent labeling.
 101
 102 What:           /sys/bus/iio/devices/deviceX/temp_raw
 103 What:           /sys/bus/iio/devices/deviceX/temp_x_raw
 104 What:           /sys/bus/iio/devices/deviceX/temp_y_raw
 105 What:           /sys/bus/iio/devices/deviceX/temp_z_raw
 106 KernelVersion:  2.6.35
 107 Contact:        linux-iio@vger.kernel.org
 108 Description:
 109                 Raw (unscaled no bias removal etc) temperature measurement.
 110                 It an axis is specified it generally means that the temperature
 111                 sensor is associated with one part of a compound device (e.g.
 112                 a gyroscope axis).
 113
 114 What:           /sys/bus/iio/devices/deviceX/tempX_input
 115 KernelVersion:  2.6.38
 116 Contact:        linux-iio@vger.kernel.org
 117 Description:
 118                 Scaled temperature measurement in milli degrees Celsius.
 119
 120 What:           /sys/bus/iio/devices/deviceX/accel_x_raw
 121 What:           /sys/bus/iio/devices/deviceX/accel_y_raw
 122 What:           /sys/bus/iio/devices/deviceX/accel_z_raw
 123 KernelVersion:  2.6.35
 124 Contact:        linux-iio@vger.kernel.org
 125 Description:
 126                 Acceleration in direction x, y or z (may be arbitrarily assigned
 127                 but should match other such assignments on device)
 128                 channel m (not present if only one accelerometer channel at
 129                 this orientation). Has all of the equivalent parameters as per
 130                 inY. Units after application of scale and offset are m/s^2.
 131
 132 What:           /sys/bus/iio/devices/deviceX/gyro_x_raw
 133 What:           /sys/bus/iio/devices/deviceX/gyro_y_raw
 134 What:           /sys/bus/iio/devices/deviceX/gyro_z_raw
 135 KernelVersion:  2.6.35
 136 Contact:        linux-iio@vger.kernel.org
 137 Description:
 138                 Angular velocity about axis x, y or z (may be arbitrarily
 139                 assigned) Data converted by application of offset then scale to
 140                 radians per second. Has all the equivalent parameters as
 141                 per inY.
 142
 143 What:           /sys/bus/iio/devices/deviceX/incli_x_raw
 144 What:           /sys/bus/iio/devices/deviceX/incli_y_raw
 145 What:           /sys/bus/iio/devices/deviceX/incli_z_raw
 146 KernelVersion:  2.6.35
 147 Contact:        linux-iio@vger.kernel.org
 148 Description:
 149                 Inclination raw reading about axis x, y or z (may be
 150                 arbitrarily assigned). Data converted by application of offset
 151                 and scale to Degrees.
 152
 153 What:           /sys/bus/iio/devices/deviceX/magn_x_raw
 154 What:           /sys/bus/iio/devices/deviceX/magn_y_raw
 155 What:           /sys/bus/iio/devices/deviceX/magn_z_raw
 156 KernelVersion:  2.6.35
 157 Contact:        linux-iio@vger.kernel.org
 158 Description:
 159                 Magnetic field along axis x, y or z (may be arbitrarily
 160                 assigned) channel m (not present if only one magnetometer
 161                 at this orientation).  Data converted by application of
 162                 offset then scale to Gauss. Has all the equivalent modifiers
 163                 as per inY.
 164
 165 What:           /sys/bus/iio/devices/deviceX/accel_x_peak_raw
 166 What:           /sys/bus/iio/devices/deviceX/accel_y_peak_raw
 167 What:           /sys/bus/iio/devices/deviceX/accel_z_peak_raw
 168 KernelVersion:  2.6.36
 169 Contact:        linux-iio@vger.kernel.org
 170 Description:
 171                 Some devices provide a store of the highest value seen since
 172                 some reset condition.  These attributes allow access to this
 173                 and are otherwise the direct equivalent of the
 174                 <type>Y[_name]_raw attributes.
 175
 176 What:           /sys/bus/iio/devices/deviceX/accel_xyz_squared_peak_raw
 177 KernelVersion:  2.6.36
 178 Contact:        linux-iio@vger.kernel.org
 179 Description:
 180                 A computed peak value based on the sum squared magnitude of
 181                 the underlying value in the specified directions.
 182
 183 What:           /sys/bus/iio/devices/deviceX/accel_offset
 184 What:           /sys/bus/iio/devices/deviceX/temp_offset
 185 KernelVersion:  2.6.35
 186 Contact:        linux-iio@vger.kernel.org
 187 Description:
 188                 If known for a device, offset to be added to <type>[Y]_raw prior
 189                 to scaling by <type>[Y]_scale in order to obtain value in the
 190                 <type> units as specified in <type>[y]_raw documentation.
 191                 Not present if the offset is always 0 or unknown. If Y is not
 192                 present, then the offset applies to all in channels of <type>.
 193                 May be writable if a variable offset can be applied on the
 194                 device. Note that this is different to calibbias which
 195                 is for devices (or drivers) that apply offsets to compensate
 196                 for variation between different instances of the part, typically
 197                 adjusted by using some hardware supported calibration procedure.
 198
 199 What:           /sys/bus/iio/devices/deviceX/inY_scale
 200 What:           /sys/bus/iio/devices/deviceX/inY_supply_scale
 201 What:           /sys/bus/iio/devices/deviceX/in_scale
 202 What:           /sys/bus/iio/devices/deviceX/outY_scale
 203 What:           /sys/bus/iio/devices/deviceX/accel_scale
 204 What:           /sys/bus/iio/devices/deviceX/accel_peak_scale
 205 What:           /sys/bus/iio/devices/deviceX/gyro_scale
 206 What:           /sys/bus/iio/devices/deviceX/magn_scale
 207 What:           /sys/bus/iio/devices/deviceX/magn_x_scale
 208 What:           /sys/bus/iio/devices/deviceX/magn_y_scale
 209 What:           /sys/bus/iio/devices/deviceX/magn_z_scale
 210 KernelVersion:  2.6.35
 211 Contact:        linux-iio@vger.kernel.org
 212 Description:
 213                 If known for a device, scale to be applied to <type>Y[_name]_raw
 214                 post addition of <type>[Y][_name]_offset in order to obtain the
 215                 measured value in <type> units as specified in
 216                 <type>[Y][_name]_raw documentation..  If shared across all in
 217                 channels then Y is not present and the value is called
 218                 <type>[Y][_name]_scale. The peak modifier means this value
 219                 is applied to <type>Y[_name]_peak_raw values.
 220
 221 What:           /sys/bus/iio/devices/deviceX/accel_x_calibbias
 222 What:           /sys/bus/iio/devices/deviceX/accel_y_calibbias
 223 What:           /sys/bus/iio/devices/deviceX/accel_z_calibbias
 224 What:           /sys/bus/iio/devices/deviceX/gyro_x_calibbias
 225 What:           /sys/bus/iio/devices/deviceX/gyro_y_calibbias
 226 What:           /sys/bus/iio/devices/deviceX/gyro_z_calibbias
 227 KernelVersion:  2.6.35
 228 Contact:        linux-iio@vger.kernel.org
 229 Description:
 230                 Hardware applied calibration offset. (assumed to fix production
 231                 inaccuracies). If shared across all channels, <type>_calibbias
 232                 is used.
 233
 234 What            /sys/bus/iio/devices/deviceX/inY_calibscale
 235 What            /sys/bus/iio/devices/deviceX/inY_supply_calibscale
 236 What            /sys/bus/iio/devices/deviceX/in_calibscale
 237 What            /sys/bus/iio/devices/deviceX/accel_x_calibscale
 238 What            /sys/bus/iio/devices/deviceX/accel_y_calibscale
 239 What            /sys/bus/iio/devices/deviceX/accel_z_calibscale
 240 What            /sys/bus/iio/devices/deviceX/gyro_x_calibscale
 241 What            /sys/bus/iio/devices/deviceX/gyro_y_calibscale
 242 What            /sys/bus/iio/devices/deviceX/gyro_z_calibscale
 243 KernelVersion:  2.6.35
 244 Contact:        linux-iio@vger.kernel.org
 245 Description:
 246                 Hardware applied calibration scale factor. (assumed to fix
 247                 production inaccuracies).  If shared across all channels,
 248                 <type>_calibscale is used.
 249
 250 What:           /sys/bus/iio/devices/deviceX/accel_scale_available
 251 KernelVersion:  2.635
 252 Contact:        linux-iio@vger.kernel.org
 253 Description:
 254                 If a discrete set of scale values are available, they
 255                 are listed in this attribute.
 256
 257 What:           /sys/bus/iio/devices/deviceX/outY_raw
 258 KernelVersion:  2.6.37
 259 Contact:        linux-iio@vger.kernel.org
 260 Description:
 261                 Raw (unscaled, no bias etc.) output voltage for
 262                 channel Y.  The number must always be specified and
 263                 unique if the output corresponds to a single channel.
 264
 265 What:           /sys/bus/iio/devices/deviceX/outY&Z_raw
 266 KernelVersion:  2.6.37
 267 Contact:        linux-iio@vger.kernel.org
 268 Description:
 269                 Raw (unscaled, no bias etc.) output voltage for an aggregate of
 270                 channel Y, channel Z, etc.  This interface is available in cases
 271                 where a single output sets the value for multiple channels
 272                 simultaneously.
 273
 274 What:           /sys/bus/iio/devices/deviceX/outY_powerdown_mode
 275 What:           /sys/bus/iio/devices/deviceX/out_powerdown_mode
 276 KernelVersion:  2.6.38
 277 Contact:        linux-iio@vger.kernel.org
 278 Description:
 279                 Specifies the output powerdown mode.
 280                 DAC output stage is disconnected from the amplifier and
 281                 1kohm_to_gnd: connected to ground via an 1kOhm resistor
 282                 100kohm_to_gnd: connected to ground via an 100kOhm resistor
 283                 three_state: left floating
 284                 For a list of available output power down options read
 285                 outX_powerdown_mode_available. If Y is not present the
 286                 mode is shared across all outputs.
 287
 288 What:           /sys/bus/iio/devices/deviceX/outY_powerdown_mode_available
 289 What:           /sys/bus/iio/devices/deviceX/out_powerdown_mode_available
 290 KernelVersion:  2.6.38
 291 Contact:        linux-iio@vger.kernel.org
 292 Description:
 293                 Lists all available output power down modes.
 294                 If Y is not present the mode is shared across all outputs.
 295
 296 What:           /sys/bus/iio/devices/deviceX/outY_powerdown
 297 What:           /sys/bus/iio/devices/deviceX/out_powerdown
 298 KernelVersion:  2.6.38
 299 Contact:        linux-iio@vger.kernel.org
 300 Description:
 301                 Writing 1 causes output Y to enter the power down mode specified
 302                 by the corresponding outY_powerdown_mode. Clearing returns to
 303                 normal operation. Y may be suppressed if all outputs are
 304                 controlled together.
 305
 306 What:           /sys/bus/iio/devices/deviceX/deviceX:eventY
 307 KernelVersion:  2.6.35
 308 Contact:        linux-iio@vger.kernel.org
 309 Description:
 310                 Configuration of which hardware generated events are passed up
 311                 to user-space.
 312
 313 What:           /sys/bus/iio/devices/deviceX:event/dev
 314 What:           /sys/bus/iio/devices/deviceX:eventY/dev
 315 KernelVersion:  2.6.35
 316 Contact:        linux-iio@vger.kernel.org
 317 Description:
 318                 major:minor character device numbers for the event line Y of
 319                 device X.
 320
 321 What:           /sys/.../deviceX:eventY/accel_x_thresh_rising_en
 322 What:           /sys/.../deviceX:eventY/accel_x_thresh_falling_en
 323 What:           /sys/.../deviceX:eventY/accel_y_thresh_rising_en
 324 What:           /sys/.../deviceX:eventY/accel_y_thresh_falling_en
 325 What:           /sys/.../deviceX:eventY/accel_z_thresh_rising_en
 326 What:           /sys/.../deviceX:eventY/accel_z_thresh_falling_en
 327 What:           /sys/.../deviceX:eventY/gyro_x_thresh_rising_en
 328 What:           /sys/.../deviceX:eventY/gyro_x_thresh_falling_en
 329 What:           /sys/.../deviceX:eventY/gyro_y_thresh_rising_en
 330 What:           /sys/.../deviceX:eventY/gyro_y_thresh_falling_en
 331 What:           /sys/.../deviceX:eventY/gyro_z_thresh_rising_en
 332 What:           /sys/.../deviceX:eventY/gyro_z_thresh_falling_en
 333 What:           /sys/.../deviceX:eventY/magn_x_thresh_rising_en
 334 What:           /sys/.../deviceX:eventY/magn_x_thresh_falling_en
 335 What:           /sys/.../deviceX:eventY/magn_y_thresh_rising_en
 336 What:           /sys/.../deviceX:eventY/magn_y_thresh_falling_en
 337 What:           /sys/.../deviceX:eventY/magn_z_thresh_rising_en
 338 What:           /sys/.../deviceX:eventY/magn_z_thresh_falling_en
 339 What:           /sys/.../deviceX:eventY/inZ_supply_thresh_rising_en
 340 What:           /sys/.../deviceX:eventY/inZ_supply_thresh_falling_en
 341 What:           /sys/.../deviceX:eventY/inZ_thresh_rising_en
 342 What:           /sys/.../deviceX:eventY/inZ_thresh_falling_en
 343 What:           /sys/.../deviceX:eventY/temp_thresh_rising_en
 344 What:           /sys/.../deviceX:eventY/temp_thresh_falling_en
 345 KernelVersion:  2.6.37
 346 Contact:        linux-iio@vger.kernel.org
 347 Description:
 348                 Event generated when channel passes a threshold in the specified
 349                 (_rising|_falling) direction. If the direction is not specified,
 350                 then either the device will report an event which ever direction
 351                 a single threshold value is called in (e.g.
 352                 <type>[Z][_name]_<raw|input>_thresh_value) or
 353                 <type>[Z][_name]_<raw|input>_thresh_rising_value and
 354                 <type>[Z][_name]_<raw|input>_thresh_falling_value may take
 355                 different values, but the device can only enable both thresholds
 356                 or neither.
 357                 Note the driver will assume the last p events requested are
 358                 to be enabled where p is however many it supports (which may
 359                 vary depending on the exact set requested. So if you want to be
 360                 sure you have set what you think you have, check the contents of
 361                 these attributes after everything is configured. Drivers may
 362                 have to buffer any parameters so that they are consistent when
 363                 a given event type is enabled a future point (and not those for
 364                 whatever event was previously enabled).
 365
 366 What:           /sys/.../deviceX:eventY/accel_x_roc_rising_en
 367 What:           /sys/.../deviceX:eventY/accel_x_roc_falling_en
 368 What:           /sys/.../deviceX:eventY/accel_y_roc_rising_en
 369 What:           /sys/.../deviceX:eventY/accel_y_roc_falling_en
 370 What:           /sys/.../deviceX:eventY/accel_z_roc_rising_en
 371 What:           /sys/.../deviceX:eventY/accel_z_roc_falling_en
 372 What:           /sys/.../deviceX:eventY/gyro_x_roc_rising_en
 373 What:           /sys/.../deviceX:eventY/gyro_x_roc_falling_en
 374 What:           /sys/.../deviceX:eventY/gyro_y_roc_rising_en
 375 What:           /sys/.../deviceX:eventY/gyro_y_roc_falling_en
 376 What:           /sys/.../deviceX:eventY/gyro_z_roc_rising_en
 377 What:           /sys/.../deviceX:eventY/gyro_z_roc_falling_en
 378 What:           /sys/.../deviceX:eventY/magn_x_roc_rising_en
 379 What:           /sys/.../deviceX:eventY/magn_x_roc_falling_en
 380 What:           /sys/.../deviceX:eventY/magn_y_roc_rising_en
 381 What:           /sys/.../deviceX:eventY/magn_y_roc_falling_en
 382 What:           /sys/.../deviceX:eventY/magn_z_roc_rising_en
 383 What:           /sys/.../deviceX:eventY/magn_z_roc_falling_en
 384 What:           /sys/.../deviceX:eventY/inZ_supply_roc_rising_en
 385 What:           /sys/.../deviceX:eventY/inZ_supply_roc_falling_en
 386 What:           /sys/.../deviceX:eventY/inZ_roc_rising_en
 387 What:           /sys/.../deviceX:eventY/inZ_roc_falling_en
 388 What:           /sys/.../deviceX:eventY/temp_roc_rising_en
 389 What:           /sys/.../deviceX:eventY/temp_roc_falling_en
 390 KernelVersion:  2.6.37
 391 Contact:        linux-iio@vger.kernel.org
 392 Description:
 393                 Event generated when channel passes a threshold on the rate of
 394                 change (1st differential) in the specified (_rising|_falling)
 395                 direction. If the direction is not specified, then either the
 396                 device will report an event which ever direction a single
 397                 threshold value is called in (e.g.
 398                 <type>[Z][_name]_<raw|input>_roc_value) or
 399                 <type>[Z][_name]_<raw|input>_roc_rising_value and
 400                 <type>[Z][_name]_<raw|input>_roc_falling_value may take
 401                 different values, but the device can only enable both rate of
 402                 change thresholds or neither.
 403                 Note the driver will assume the last p events requested are
 404                 to be enabled where p is however many it supports (which may
 405                 vary depending on the exact set requested. So if you want to be
 406                 sure you have set what you think you have, check the contents of
 407                 these attributes after everything is configured. Drivers may
 408                 have to buffer any parameters so that they are consistent when
 409                 a given event type is enabled a future point (and not those for
 410                 whatever event was previously enabled).
 411
 412 What:           /sys/.../deviceX:eventY/accel_x_raw_thresh_rising_value
 413 What:           /sys/.../deviceX:eventY/accel_x_raw_thresh_falling_value
 414 What:           /sys/.../deviceX:eventY/accel_y_raw_thresh_rising_value
 415 What:           /sys/.../deviceX:eventY/accel_y_raw_thresh_falling_value
 416 What:           /sys/.../deviceX:eventY/accel_z_raw_thresh_rising_value
 417 What:           /sys/.../deviceX:eventY/accel_z_raw_thresh_falling_value
 418 What:           /sys/.../deviceX:eventY/gyro_x_raw_thresh_rising_value
 419 What:           /sys/.../deviceX:eventY/gyro_x_raw_thresh_falling_value
 420 What:           /sys/.../deviceX:eventY/gyro_y_raw_thresh_rising_value
 421 What:           /sys/.../deviceX:eventY/gyro_y_raw_thresh_falling_value
 422 What:           /sys/.../deviceX:eventY/gyro_z_raw_thresh_rising_value
 423 What:           /sys/.../deviceX:eventY/gyro_z_raw_thresh_falling_value
 424 What:           /sys/.../deviceX:eventY/magn_x_raw_thresh_rising_value
 425 What:           /sys/.../deviceX:eventY/magn_x_raw_thresh_falling_value
 426 What:           /sys/.../deviceX:eventY/magn_y_raw_thresh_rising_value
 427 What:           /sys/.../deviceX:eventY/magn_y_raw_thresh_falling_value
 428 What:           /sys/.../deviceX:eventY/magn_z_raw_thresh_rising_value
 429 What:           /sys/.../deviceX:eventY/magn_z_raw_thresh_falling_value
 430 What:           /sys/.../deviceX:eventY/inZ_supply_raw_thresh_rising_value
 431 What:           /sys/.../deviceX:eventY/inZ_supply_raw_thresh_falling_value
 432 What:           /sys/.../deviceX:eventY/inZ_raw_thresh_falling_value
 433 What:           /sys/.../deviceX:eventY/inZ_raw_thresh_falling_value
 434 What:           /sys/.../deviceX:eventY/temp_raw_thresh_falling_value
 435 What:           /sys/.../deviceX:eventY/temp_raw_thresh_falling_value
 436 KernelVersion:  2.6.37
 437 Contact:        linux-iio@vger.kernel.org
 438 Description:
 439                 Specifies the value of threshold that the device is comparing
 440                 against for the events enabled by
 441                 <type>Z[_name]_thresh[_rising|falling]_en.
 442                 If separate attributes  exist for the two directions, but
 443                 direction is not specified for this attribute, then a single
 444                 threshold value applies to both directions.
 445                 The raw or input element of the name indicates whether the
 446                 value is in raw device units or in processed units (as _raw
 447                 and _input do on sysfs direct channel read attributes).
 448
 449 What:           /sys/.../deviceX:eventY/accel_x_raw_roc_rising_value
 450 What:           /sys/.../deviceX:eventY/accel_x_raw_roc_falling_value
 451 What:           /sys/.../deviceX:eventY/accel_y_raw_roc_rising_value
 452 What:           /sys/.../deviceX:eventY/accel_y_raw_roc_falling_value
 453 What:           /sys/.../deviceX:eventY/accel_z_raw_roc_rising_value
 454 What:           /sys/.../deviceX:eventY/accel_z_raw_roc_falling_value
 455 What:           /sys/.../deviceX:eventY/gyro_x_raw_roc_rising_value
 456 What:           /sys/.../deviceX:eventY/gyro_x_raw_roc_falling_value
 457 What:           /sys/.../deviceX:eventY/gyro_y_raw_roc_rising_value
 458 What:           /sys/.../deviceX:eventY/gyro_y_raw_roc_falling_value
 459 What:           /sys/.../deviceX:eventY/gyro_z_raw_roc_rising_value
 460 What:           /sys/.../deviceX:eventY/gyro_z_raw_roc_falling_value
 461 What:           /sys/.../deviceX:eventY/magn_x_raw_roc_rising_value
 462 What:           /sys/.../deviceX:eventY/magn_x_raw_roc_falling_value
 463 What:           /sys/.../deviceX:eventY/magn_y_raw_roc_rising_value
 464 What:           /sys/.../deviceX:eventY/magn_y_raw_roc_falling_value
 465 What:           /sys/.../deviceX:eventY/magn_z_raw_roc_rising_value
 466 What:           /sys/.../deviceX:eventY/magn_z_raw_roc_falling_value
 467 What:           /sys/.../deviceX:eventY/inZ_supply_raw_roc_rising_value
 468 What:           /sys/.../deviceX:eventY/inZ_supply_raw_roc_falling_value
 469 What:           /sys/.../deviceX:eventY/inZ_raw_roc_falling_value
 470 What:           /sys/.../deviceX:eventY/inZ_raw_roc_falling_value
 471 What:           /sys/.../deviceX:eventY/temp_raw_roc_falling_value
 472 What:           /sys/.../deviceX:eventY/temp_raw_roc_falling_value
 473 KernelVersion:  2.6.37
 474 Contact:        linux-iio@vger.kernel.org
 475 Description:
 476                 Specifies the value of rate of change threshold that the
 477                 device is comparing against for the events enabled by
 478                 <type>[Z][_name]_roc[_rising|falling]_en.
 479                 If separate attributes exist for the two directions,
 480                 but direction is not specified for this attribute,
 481                 then a single threshold value applies to both directions.
 482                 The raw or input element of the name indicates whether the
 483                 value is in raw device units or in processed units (as _raw
 484                 and _input do on sysfs direct channel read attributes).
 485
 486 What:           /sys/.../deviceX:eventY/accel_x_thresh_rising_period
 487 What:           /sys/.../deviceX:eventY/accel_x_thresh_falling_period
 488 hat:            /sys/.../deviceX:eventY/accel_x_roc_rising_period
 489 What:           /sys/.../deviceX:eventY/accel_x_roc_falling_period
 490 What:           /sys/.../deviceX:eventY/accel_y_thresh_rising_period
 491 What:           /sys/.../deviceX:eventY/accel_y_thresh_falling_period
 492 What:           /sys/.../deviceX:eventY/accel_y_roc_rising_period
 493 What:           /sys/.../deviceX:eventY/accel_y_roc_falling_period
 494 What:           /sys/.../deviceX:eventY/accel_z_thresh_rising_period
 495 What:           /sys/.../deviceX:eventY/accel_z_thresh_falling_period
 496 What:           /sys/.../deviceX:eventY/accel_z_roc_rising_period
 497 What:           /sys/.../deviceX:eventY/accel_z_roc_falling_period
 498 What:           /sys/.../deviceX:eventY/gyro_x_thresh_rising_period
 499 What:           /sys/.../deviceX:eventY/gyro_x_thresh_falling_period
 500 What:           /sys/.../deviceX:eventY/gyro_x_roc_rising_period
 501 What:           /sys/.../deviceX:eventY/gyro_x_roc_falling_period
 502 What:           /sys/.../deviceX:eventY/gyro_y_thresh_rising_period
 503 What:           /sys/.../deviceX:eventY/gyro_y_thresh_falling_period
 504 What:           /sys/.../deviceX:eventY/gyro_y_roc_rising_period
 505 What:           /sys/.../deviceX:eventY/gyro_y_roc_falling_period
 506 What:           /sys/.../deviceX:eventY/gyro_z_thresh_rising_period
 507 What:           /sys/.../deviceX:eventY/gyro_z_thresh_falling_period
 508 What:           /sys/.../deviceX:eventY/gyro_z_roc_rising_period
 509 What:           /sys/.../deviceX:eventY/gyro_z_roc_falling_period
 510 What:           /sys/.../deviceX:eventY/magn_x_thresh_rising_period
 511 What:           /sys/.../deviceX:eventY/magn_x_thresh_falling_period
 512 What:           /sys/.../deviceX:eventY/magn_x_roc_rising_period
 513 What:           /sys/.../deviceX:eventY/magn_x_roc_falling_period
 514 What:           /sys/.../deviceX:eventY/magn_y_thresh_rising_period
 515 What:           /sys/.../deviceX:eventY/magn_y_thresh_falling_period
 516 What:           /sys/.../deviceX:eventY/magn_y_roc_rising_period
 517 What:           /sys/.../deviceX:eventY/magn_y_roc_falling_period
 518 What:           /sys/.../deviceX:eventY/magn_z_thresh_rising_period
 519 What:           /sys/.../deviceX:eventY/magn_z_thresh_falling_period
 520 What:           /sys/.../deviceX:eventY/magn_z_roc_rising_period
 521 What:           /sys/.../deviceX:eventY/magn_z_roc_falling_period
 522 What:           /sys/.../deviceX:eventY/inZ_supply_thresh_rising_period
 523 What:           /sys/.../deviceX:eventY/inZ_supply_thresh_falling_period
 524 What:           /sys/.../deviceX:eventY/inz_supply_roc_rising_period
 525 What:           /sys/.../deviceX:eventY/inZ_supply_roc_falling_period
 526 What:           /sys/.../deviceX:eventY/inZ_thresh_rising_period
 527 What:           /sys/.../deviceX:eventY/inZ_thresh_falling_period
 528 What:           /sys/.../deviceX:eventY/inZ_roc_rising_period
 529 What:           /sys/.../deviceX:eventY/inZ_roc_falling_period
 530 What:           /sys/.../deviceX:eventY/temp_thresh_rising_period
 531 What:           /sys/.../deviceX:eventY/temp_thresh_falling_period
 532 What:           /sys/.../deviceX:eventY/temp_roc_rising_period
 533 What:           /sys/.../deviceX:eventY/temp_roc_falling_period
 534 What:           /sys/.../deviceX:eventY/accel_x&y&z_mag_falling_period
 535 KernelVersion:  2.6.37
 536 Contact:        linux-iio@vger.kernel.org
 537 Description:
 538                 Period of time (in seconds) for which the condition must be
 539                 met before an event is generated. If direction is not
 540                 specified then this period applies to both directions.
 541
 542 What:           /sys/.../deviceX:eventY/accel_mag_en
 543 What:           /sys/.../deviceX:eventY/accel_mag_rising_en
 544 What:           /sys/.../deviceX:eventY/accel_mag_falling_en
 545 What:           /sys/.../deviceX:eventY/accel_x_mag_en
 546 What:           /sys/.../deviceX:eventY/accel_x_mag_rising_en
 547 What:           /sys/.../deviceX:eventY/accel_x_mag_falling_en
 548 What:           /sys/.../deviceX:eventY/accel_y_mag_en
 549 What:           /sys/.../deviceX:eventY/accel_y_mag_rising_en
 550 What:           /sys/.../deviceX:eventY/accel_y_mag_falling_en
 551 What:           /sys/.../deviceX:eventY/accel_z_mag_en
 552 What:           /sys/.../deviceX:eventY/accel_z_mag_rising_en
 553 What:           /sys/.../deviceX:eventY/accel_z_mag_falling_en
 554 What:           /sys/.../deviceX:eventY/accel_x&y&z_mag_rising_en
 555 What:           /sys/.../deviceX:eventY/accel_x&y&z_mag_falling_en
 556 KernelVersion:  2.6.37
 557 Contact:        linux-iio@vger.kernel.org
 558 Description:
 559                 Similar to accel_x_thresh[_rising|_falling]_en, but here the
 560                 magnitude of the channel is compared to the threshold, not its
 561                 signed value.
 562
 563 What:           /sys/.../accel_raw_mag_value
 564 What:           /sys/.../accel_x_raw_mag_rising_value
 565 What:           /sys/.../accel_y_raw_mag_rising_value
 566 What:           /sys/.../accel_z_raw_mag_rising_value
 567 KernelVersion:  2.6.37
 568 Contact:        linux-iio@vger.kernel.org
 569 Description:
 570                 The value to which the magnitude of the channel is compared. If
 571                 number or direction is not specified, applies to all channels of
 572                 this type.
 573
 574 What:           /sys/bus/iio/devices/deviceX:buffer:event/dev
 575 KernelVersion:  2.6.35
 576 Contact:        linux-iio@vger.kernel.org
 577 Description:
 578                 Buffer for device X event character device major:minor numbers.
 579
 580 What:           /sys/bus/iio/devices/deviceX:buffer:access/dev
 581 KernelVersion:  2.6.35
 582 Contact:        linux-iio@vger.kernel.org
 583 Description:
 584                 Buffer for device X access character device major:minor numbers.
 585
 586 What:           /sys/bus/iio/devices/deviceX:buffer/trigger
 587 KernelVersion:  2.6.35
 588 Contact:        linux-iio@vger.kernel.org
 589 Description:
 590                 The name of the trigger source being used, as per string given
 591                 in /sys/class/iio/triggerY/name.
 592
 593 What:           /sys/bus/iio/devices/deviceX:buffer/length
 594 KernelVersion:  2.6.35
 595 Contact:        linux-iio@vger.kernel.org
 596 Description:
 597                 Number of scans contained by the buffer.
 598
 599 What:           /sys/bus/iio/devices/deviceX:buffer/bytes_per_datum
 600 KernelVersion:  2.6.37
 601 Contact:        linux-iio@vger.kernel.org
 602 Description:
 603                 Bytes per scan.  Due to alignment fun, the scan may be larger
 604                 than implied directly by the scan_element parameters.
 605
 606 What:           /sys/bus/iio/devices/deviceX:buffer/enable
 607 KernelVersion:  2.6.35
 608 Contact:        linux-iio@vger.kernel.org
 609 Description:
 610                 Actually start the buffer capture up.  Will start trigger
 611                 if first device and appropriate.
 612
 613 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements
 614 KernelVersion:  2.6.37
 615 Contact:        linux-iio@vger.kernel.org
 616 Description:
 617                 Directory containing interfaces for elements that will be
 618                 captured for a single triggered sample set in the buffer.
 619
 620 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_x_en
 621 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_y_en
 622 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_z_en
 623 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_x_en
 624 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_y_en
 625 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_z_en
 626 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_x_en
 627 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_y_en
 628 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_z_en
 629 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/timestamp_en
 630 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_supply_en
 631 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_en
 632 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY-inZ_en
 633 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_x_en
 634 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_y_en
 635 KernelVersion:  2.6.37
 636 Contact:        linux-iio@vger.kernel.org
 637 Description:
 638                 Scan element control for triggered data capture.
 639
 640 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_type
 641 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_type
 642 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_type
 643 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_type
 644 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_type
 645 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/in-in_type
 646 What:           /sys/.../deviceX:buffer/scan_elements/inY_supply_type
 647 What:           /sys/.../deviceX:buffer/scan_elements/timestamp_type
 648 KernelVersion:  2.6.37
 649 Contact:        linux-iio@vger.kernel.org
 650 Description:
 651                 Description of the scan element data storage within the buffer
 652                 and hence the form in which it is read from user-space.
 653                 Form is [s|u]bits/storagebits[>>shift].  s or u specifies if
 654                 signed (2's complement) or unsigned. bits is the number of bits
 655                 of data and storagebits is the space (after padding) that it
 656                 occupies in the buffer. shift if specified, is the shift that
 657                 needs to be applied prior to masking out unused bits. Some
 658                 devices put their data in the middle of the transferred elements
 659                 with additional information on both sides.  Note that some
 660                 devices will have additional information in the unused bits
 661                 so to get a clean value, the bits value must be used to mask
 662                 the buffer output value appropriately.  The storagebits value
 663                 also specifies the data alignment.  So s48/64>>2 will be a
 664                 signed 48 bit integer stored in a 64 bit location aligned to
 665                 a a64 bit boundary. To obtain the clean value, shift right 2
 666                 and apply a mask to zero the top 16 bits of the result.
 667                 For other storage combinations this attribute will be extended
 668                 appropriately.
 669
 670 What:           /sys/.../deviceX:buffer/scan_elements/accel_type_available
 671 KernelVersion:  2.6.37
 672 Contact:        linux-iio@vger.kernel.org
 673 Description:
 674                 If the type parameter can take one of a small set of values,
 675                 this attribute lists them.
 676
 677 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/inY_index
 678 What:           /sys/.../deviceX:buffer/scan_elements/inY_supply_index
 679 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_x_index
 680 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_y_index
 681 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/accel_z_index
 682 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_x_index
 683 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_y_index
 684 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/gyro_z_index
 685 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_x_index
 686 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_y_index
 687 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/magn_z_index
 688 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_x_index
 689 What:           /sys/bus/iio/devices/deviceX:buffer/scan_elements/incli_y_index
 690 What:           /sys/.../deviceX:buffer/scan_elements/timestamp_index
 691 KernelVersion:  2.6.37
 692 Contact:        linux-iio@vger.kernel.org
 693 Description:
 694                 A single positive integer specifying the position of this
 695                 scan element in the buffer. Note these are not dependent on
 696                 what is enabled and may not be contiguous. Thus for user-space
 697                 to establish the full layout these must be used in conjunction
 698                 with all _en attributes to establish which channels are present,
 699                 and the relevant _type attributes to establish the data storage
 700                 format.