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

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