sysfs-bus-iio 75 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595159615971598159916001601160216031604160516061607160816091610161116121613161416151616161716181619162016211622162316241625
  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. What: /sys/bus/iio/devices/triggerX
  9. KernelVersion: 2.6.35
  10. Contact: linux-iio@vger.kernel.org
  11. Description:
  12. An event driven driver of data capture to an in kernel buffer.
  13. May be provided by a device driver that also has an IIO device
  14. based on hardware generated events (e.g. data ready) or
  15. provided by a separate driver for other hardware (e.g.
  16. periodic timer, GPIO or high resolution timer).
  17. Contains trigger type specific elements. These do not
  18. generalize well and hence are not documented in this file.
  19. X is the IIO index of the trigger.
  20. What: /sys/bus/iio/devices/iio:deviceX/buffer
  21. KernelVersion: 2.6.35
  22. Contact: linux-iio@vger.kernel.org
  23. Description:
  24. Directory of attributes relating to the buffer for the device.
  25. What: /sys/bus/iio/devices/iio:deviceX/name
  26. KernelVersion: 2.6.35
  27. Contact: linux-iio@vger.kernel.org
  28. Description:
  29. Description of the physical chip / device for device X.
  30. Typically a part number.
  31. What: /sys/bus/iio/devices/iio:deviceX/timestamp_clock
  32. KernelVersion: 4.5
  33. Contact: linux-iio@vger.kernel.org
  34. Description:
  35. String identifying current posix clock used to timestamp
  36. buffered samples and events for device X.
  37. What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency
  38. What: /sys/bus/iio/devices/iio:deviceX/buffer/sampling_frequency
  39. What: /sys/bus/iio/devices/triggerX/sampling_frequency
  40. KernelVersion: 2.6.35
  41. Contact: linux-iio@vger.kernel.org
  42. Description:
  43. Some devices have internal clocks. This parameter sets the
  44. resulting sampling frequency. In many devices this
  45. parameter has an effect on input filters etc. rather than
  46. simply controlling when the input is sampled. As this
  47. effects data ready triggers, hardware buffers and the sysfs
  48. direct access interfaces, it may be found in any of the
  49. relevant directories. If it effects all of the above
  50. then it is to be found in the base device directory.
  51. What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available
  52. What: /sys/bus/iio/devices/iio:deviceX/in_proximity_sampling_frequency_available
  53. What: /sys/.../iio:deviceX/buffer/sampling_frequency_available
  54. What: /sys/bus/iio/devices/triggerX/sampling_frequency_available
  55. KernelVersion: 2.6.35
  56. Contact: linux-iio@vger.kernel.org
  57. Description:
  58. When the internal sampling clock can only take a small
  59. discrete set of values, this file lists those available.
  60. What: /sys/bus/iio/devices/iio:deviceX/oversampling_ratio
  61. KernelVersion: 2.6.38
  62. Contact: linux-iio@vger.kernel.org
  63. Description:
  64. Hardware dependent ADC oversampling. Controls the sampling ratio
  65. of the digital filter if available.
  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. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
  72. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
  73. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw
  74. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw
  75. KernelVersion: 2.6.35
  76. Contact: linux-iio@vger.kernel.org
  77. Description:
  78. Raw (unscaled no bias removal etc.) voltage measurement from
  79. channel Y. In special cases where the channel does not
  80. correspond to externally available input one of the named
  81. versions may be used. The number must always be specified and
  82. unique to allow association with event codes. Units after
  83. application of scale and offset are millivolts.
  84. Channels with 'i' and 'q' modifiers always exist in pairs and both
  85. channels refer to the same signal. The 'i' channel contains the in-phase
  86. component of the signal while the 'q' channel contains the quadrature
  87. component.
  88. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
  89. KernelVersion: 2.6.35
  90. Contact: linux-iio@vger.kernel.org
  91. Description:
  92. Raw (unscaled) differential voltage measurement equivalent to
  93. channel Y - channel Z where these channel numbers apply to the
  94. physically equivalent inputs when non differential readings are
  95. separately available. In differential only parts, then all that
  96. is required is a consistent labeling. Units after application
  97. of scale and offset are millivolts.
  98. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_raw
  99. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_raw
  100. KernelVersion: 3.17
  101. Contact: linux-iio@vger.kernel.org
  102. Description:
  103. Raw (unscaled no bias removal etc.) current measurement from
  104. channel Y. In special cases where the channel does not
  105. correspond to externally available input one of the named
  106. versions may be used. The number must always be specified and
  107. unique to allow association with event codes. Units after
  108. application of scale and offset are milliamps.
  109. What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
  110. KernelVersion: 3.2
  111. Contact: linux-iio@vger.kernel.org
  112. Description:
  113. Raw capacitance measurement from channel Y. Units after
  114. application of scale and offset are nanofarads.
  115. What: /sys/.../iio:deviceX/in_capacitanceY-in_capacitanceZ_raw
  116. KernelVersion: 3.2
  117. Contact: linux-iio@vger.kernel.org
  118. Description:
  119. Raw differential capacitance measurement equivalent to
  120. channel Y - channel Z where these channel numbers apply to the
  121. physically equivalent inputs when non differential readings are
  122. separately available. In differential only parts, then all that
  123. is required is a consistent labeling. Units after application
  124. of scale and offset are nanofarads.
  125. What: /sys/bus/iio/devices/iio:deviceX/in_temp_raw
  126. What: /sys/bus/iio/devices/iio:deviceX/in_tempX_raw
  127. What: /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw
  128. What: /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw
  129. What: /sys/bus/iio/devices/iio:deviceX/in_temp_ambient_raw
  130. What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_raw
  131. KernelVersion: 2.6.35
  132. Contact: linux-iio@vger.kernel.org
  133. Description:
  134. Raw (unscaled no bias removal etc.) temperature measurement.
  135. If an axis is specified it generally means that the temperature
  136. sensor is associated with one part of a compound device (e.g.
  137. a gyroscope axis). The ambient and object modifiers distinguish
  138. between ambient (reference) and distant temperature for contact-
  139. less measurements. Units after application of scale and offset
  140. are milli degrees Celsius.
  141. What: /sys/bus/iio/devices/iio:deviceX/in_tempX_input
  142. KernelVersion: 2.6.38
  143. Contact: linux-iio@vger.kernel.org
  144. Description:
  145. Scaled temperature measurement in milli degrees Celsius.
  146. What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw
  147. What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw
  148. What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw
  149. KernelVersion: 2.6.35
  150. Contact: linux-iio@vger.kernel.org
  151. Description:
  152. Acceleration in direction x, y or z (may be arbitrarily assigned
  153. but should match other such assignments on device).
  154. Has all of the equivalent parameters as per voltageY. Units
  155. after application of scale and offset are m/s^2.
  156. What: /sys/bus/iio/devices/iio:deviceX/in_gravity_x_raw
  157. What: /sys/bus/iio/devices/iio:deviceX/in_gravity_y_raw
  158. What: /sys/bus/iio/devices/iio:deviceX/in_gravity_z_raw
  159. KernelVersion: 4.11
  160. Contact: linux-iio@vger.kernel.org
  161. Description:
  162. Gravity in direction x, y or z (may be arbitrarily assigned
  163. but should match other such assignments on device).
  164. Units after application of scale and offset are m/s^2.
  165. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw
  166. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
  167. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
  168. KernelVersion: 2.6.35
  169. Contact: linux-iio@vger.kernel.org
  170. Description:
  171. Angular velocity about axis x, y or z (may be arbitrarily
  172. assigned). Has all the equivalent parameters as per voltageY.
  173. Units after application of scale and offset are radians per
  174. second.
  175. What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw
  176. What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw
  177. What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw
  178. KernelVersion: 2.6.35
  179. Contact: linux-iio@vger.kernel.org
  180. Description:
  181. Inclination raw reading about axis x, y or z (may be
  182. arbitrarily assigned). Data converted by application of offset
  183. and scale to degrees.
  184. What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
  185. What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
  186. What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw
  187. KernelVersion: 2.6.35
  188. Contact: linux-iio@vger.kernel.org
  189. Description:
  190. Magnetic field along axis x, y or z (may be arbitrarily
  191. assigned). Data converted by application of offset
  192. then scale to Gauss.
  193. What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_peak_raw
  194. What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_peak_raw
  195. What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_peak_raw
  196. KernelVersion: 2.6.36
  197. Contact: linux-iio@vger.kernel.org
  198. Description:
  199. Highest value since some reset condition. These
  200. attributes allow access to this and are otherwise
  201. the direct equivalent of the <type>Y[_name]_raw attributes.
  202. What: /sys/bus/iio/devices/iio:deviceX/in_accel_xyz_squared_peak_raw
  203. KernelVersion: 2.6.36
  204. Contact: linux-iio@vger.kernel.org
  205. Description:
  206. A computed peak value based on the sum squared magnitude of
  207. the underlying value in the specified directions.
  208. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw
  209. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw
  210. KernelVersion: 3.8
  211. Contact: linux-iio@vger.kernel.org
  212. Description:
  213. Raw pressure measurement from channel Y. Units after
  214. application of scale and offset are kilopascal.
  215. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_input
  216. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_input
  217. KernelVersion: 3.8
  218. Contact: linux-iio@vger.kernel.org
  219. Description:
  220. Scaled pressure measurement from channel Y, in kilopascal.
  221. What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw
  222. KernelVersion: 3.14
  223. Contact: linux-iio@vger.kernel.org
  224. Description:
  225. Raw humidity measurement of air. Units after application of
  226. scale and offset are milli percent.
  227. What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input
  228. KernelVersion: 3.14
  229. Contact: linux-iio@vger.kernel.org
  230. Description:
  231. Scaled humidity measurement in milli percent.
  232. What: /sys/bus/iio/devices/iio:deviceX/in_X_mean_raw
  233. KernelVersion: 3.5
  234. Contact: linux-iio@vger.kernel.org
  235. Description:
  236. Averaged raw measurement from channel X. The number of values
  237. used for averaging is device specific. The converting rules for
  238. normal raw values also applies to the averaged raw values.
  239. What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
  240. What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
  241. What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
  242. What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset
  243. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
  244. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
  245. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_offset
  246. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_offset
  247. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_offset
  248. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_offset
  249. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_offset
  250. What: /sys/bus/iio/devices/iio:deviceX/in_current_offset
  251. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_offset
  252. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_offset
  253. What: /sys/bus/iio/devices/iio:deviceX/in_current_q_offset
  254. What: /sys/bus/iio/devices/iio:deviceX/in_current_i_offset
  255. What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
  256. What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset
  257. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
  258. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset
  259. What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_offset
  260. What: /sys/bus/iio/devices/iio:deviceX/in_magn_offset
  261. What: /sys/bus/iio/devices/iio:deviceX/in_rot_offset
  262. KernelVersion: 2.6.35
  263. Contact: linux-iio@vger.kernel.org
  264. Description:
  265. If known for a device, offset to be added to <type>[Y]_raw prior
  266. to scaling by <type>[Y]_scale in order to obtain value in the
  267. <type> units as specified in <type>[Y]_raw documentation.
  268. Not present if the offset is always 0 or unknown. If Y or
  269. axis <x|y|z> is not present, then the offset applies to all
  270. in channels of <type>.
  271. May be writable if a variable offset can be applied on the
  272. device. Note that this is different to calibbias which
  273. is for devices (or drivers) that apply offsets to compensate
  274. for variation between different instances of the part, typically
  275. adjusted by using some hardware supported calibration procedure.
  276. Calibbias is applied internally, offset is applied in userspace
  277. to the _raw output.
  278. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
  279. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_scale
  280. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_scale
  281. What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
  282. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale
  283. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_i_scale
  284. What: /sys/bus/iio/devices/iio:deviceX/in_voltage_q_scale
  285. What: /sys/bus/iio/devices/iio:deviceX/in_voltage-voltage_scale
  286. What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
  287. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
  288. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_scale
  289. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_supply_scale
  290. What: /sys/bus/iio/devices/iio:deviceX/in_current_scale
  291. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_i_scale
  292. What: /sys/bus/iio/devices/iio:deviceX/in_currentY_q_scale
  293. What: /sys/bus/iio/devices/iio:deviceX/in_current_i_scale
  294. What: /sys/bus/iio/devices/iio:deviceX/in_current_q_scale
  295. What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale
  296. What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
  297. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
  298. What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale
  299. What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale
  300. What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
  301. What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
  302. What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
  303. What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
  304. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_scale
  305. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_scale
  306. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_scale
  307. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
  308. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
  309. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
  310. What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
  311. What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
  312. What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
  313. What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale
  314. KernelVersion: 2.6.35
  315. Contact: linux-iio@vger.kernel.org
  316. Description:
  317. If known for a device, scale to be applied to <type>Y[_name]_raw
  318. post addition of <type>[Y][_name]_offset in order to obtain the
  319. measured value in <type> units as specified in
  320. <type>[Y][_name]_raw documentation. If shared across all in
  321. channels then Y and <x|y|z> are not present and the value is
  322. called <type>[Y][_name]_scale. The peak modifier means this
  323. value is applied to <type>Y[_name]_peak_raw values.
  324. What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias
  325. What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias
  326. What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
  327. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
  328. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
  329. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
  330. What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
  331. What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
  332. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias
  333. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias
  334. KernelVersion: 2.6.35
  335. Contact: linux-iio@vger.kernel.org
  336. Description:
  337. Hardware applied calibration offset (assumed to fix production
  338. inaccuracies).
  339. What /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale
  340. What /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale
  341. What /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_calibscale
  342. What /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_calibscale
  343. What /sys/bus/iio/devices/iio:deviceX/in_voltage_i_calibscale
  344. What /sys/bus/iio/devices/iio:deviceX/in_voltage_q_calibscale
  345. What /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale
  346. What /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale
  347. What /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale
  348. What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
  349. What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
  350. What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
  351. What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
  352. what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
  353. what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
  354. What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
  355. What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
  356. What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_calibscale
  357. KernelVersion: 2.6.35
  358. Contact: linux-iio@vger.kernel.org
  359. Description:
  360. Hardware applied calibration scale factor (assumed to fix
  361. production inaccuracies). If shared across all channels,
  362. <type>_calibscale is used.
  363. What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
  364. What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
  365. What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
  366. What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
  367. KernelVersion: 4.0
  368. Contact: linux-iio@vger.kernel.org
  369. Description:
  370. Gender of the user (e.g.: male, female) used by some pedometers
  371. to compute the stride length, distance, speed and activity
  372. type.
  373. What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
  374. What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
  375. What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
  376. What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
  377. KernelVersion: 4.0
  378. Contact: linux-iio@vger.kernel.org
  379. Description:
  380. Lists all available gender values (e.g.: male, female).
  381. What: /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
  382. What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
  383. What: /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
  384. What: /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
  385. KernelVersion: 3.19
  386. Contact: linux-iio@vger.kernel.org
  387. Description:
  388. Height of the user (in meters) used by some pedometers
  389. to compute the stride length, distance, speed and activity
  390. type.
  391. What: /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
  392. KernelVersion: 4.0
  393. Contact: linux-iio@vger.kernel.org
  394. Description:
  395. Weight of the user (in kg). It is needed by some pedometers
  396. to compute the calories burnt by the user.
  397. What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
  398. What: /sys/.../iio:deviceX/in_anglvel_scale_available
  399. What: /sys/.../iio:deviceX/in_magn_scale_available
  400. What: /sys/.../iio:deviceX/in_illuminance_scale_available
  401. What: /sys/.../iio:deviceX/in_intensity_scale_available
  402. What: /sys/.../iio:deviceX/in_proximity_scale_available
  403. What: /sys/.../iio:deviceX/in_voltageX_scale_available
  404. What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available
  405. What: /sys/.../iio:deviceX/out_voltageX_scale_available
  406. What: /sys/.../iio:deviceX/out_altvoltageX_scale_available
  407. What: /sys/.../iio:deviceX/in_capacitance_scale_available
  408. What: /sys/.../iio:deviceX/in_pressure_scale_available
  409. What: /sys/.../iio:deviceX/in_pressureY_scale_available
  410. KernelVersion: 2.6.35
  411. Contact: linux-iio@vger.kernel.org
  412. Description:
  413. If a discrete set of scale values is available, they
  414. are listed in this attribute.
  415. What /sys/bus/iio/devices/iio:deviceX/out_voltageY_hardwaregain
  416. What: /sys/bus/iio/devices/iio:deviceX/in_intensity_red_hardwaregain
  417. What: /sys/bus/iio/devices/iio:deviceX/in_intensity_green_hardwaregain
  418. What: /sys/bus/iio/devices/iio:deviceX/in_intensity_blue_hardwaregain
  419. What: /sys/bus/iio/devices/iio:deviceX/in_intensity_clear_hardwaregain
  420. KernelVersion: 2.6.35
  421. Contact: linux-iio@vger.kernel.org
  422. Description:
  423. Hardware applied gain factor. If shared across all channels,
  424. <type>_hardwaregain is used.
  425. What: /sys/.../in_accel_filter_low_pass_3db_frequency
  426. What: /sys/.../in_magn_filter_low_pass_3db_frequency
  427. What: /sys/.../in_anglvel_filter_low_pass_3db_frequency
  428. KernelVersion: 3.2
  429. Contact: linux-iio@vger.kernel.org
  430. Description:
  431. If a known or controllable low pass filter is applied
  432. to the underlying data channel, then this parameter
  433. gives the 3dB frequency of the filter in Hz.
  434. What: /sys/.../in_accel_filter_high_pass_3db_frequency
  435. What: /sys/.../in_anglvel_filter_high_pass_3db_frequency
  436. What: /sys/.../in_magn_filter_high_pass_3db_frequency
  437. KernelVersion: 4.2
  438. Contact: linux-iio@vger.kernel.org
  439. Description:
  440. If a known or controllable high pass filter is applied
  441. to the underlying data channel, then this parameter
  442. gives the 3dB frequency of the filter in Hz.
  443. What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
  444. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
  445. KernelVersion: 2.6.37
  446. Contact: linux-iio@vger.kernel.org
  447. Description:
  448. Raw (unscaled, no bias etc.) output voltage for
  449. channel Y. The number must always be specified and
  450. unique if the output corresponds to a single channel.
  451. While DAC like devices typically use out_voltage,
  452. a continuous frequency generating device, such as
  453. a DDS or PLL should use out_altvoltage.
  454. What: /sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
  455. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
  456. KernelVersion: 2.6.37
  457. Contact: linux-iio@vger.kernel.org
  458. Description:
  459. Raw (unscaled, no bias etc.) output voltage for an aggregate of
  460. channel Y, channel Z, etc. This interface is available in cases
  461. where a single output sets the value for multiple channels
  462. simultaneously.
  463. What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
  464. What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
  465. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
  466. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
  467. KernelVersion: 2.6.38
  468. Contact: linux-iio@vger.kernel.org
  469. Description:
  470. Specifies the output powerdown mode.
  471. DAC output stage is disconnected from the amplifier and
  472. 1kohm_to_gnd: connected to ground via an 1kOhm resistor,
  473. 6kohm_to_gnd: connected to ground via a 6kOhm resistor,
  474. 20kohm_to_gnd: connected to ground via a 20kOhm resistor,
  475. 90kohm_to_gnd: connected to ground via a 90kOhm resistor,
  476. 100kohm_to_gnd: connected to ground via an 100kOhm resistor,
  477. 125kohm_to_gnd: connected to ground via an 125kOhm resistor,
  478. 500kohm_to_gnd: connected to ground via a 500kOhm resistor,
  479. 640kohm_to_gnd: connected to ground via a 640kOhm resistor,
  480. three_state: left floating.
  481. For a list of available output power down options read
  482. outX_powerdown_mode_available. If Y is not present the
  483. mode is shared across all outputs.
  484. What: /sys/.../iio:deviceX/out_voltageY_powerdown_mode_available
  485. What: /sys/.../iio:deviceX/out_voltage_powerdown_mode_available
  486. What: /sys/.../iio:deviceX/out_altvoltageY_powerdown_mode_available
  487. What: /sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
  488. KernelVersion: 2.6.38
  489. Contact: linux-iio@vger.kernel.org
  490. Description:
  491. Lists all available output power down modes.
  492. If Y is not present the mode is shared across all outputs.
  493. What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
  494. What: /sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
  495. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
  496. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
  497. KernelVersion: 2.6.38
  498. Contact: linux-iio@vger.kernel.org
  499. Description:
  500. Writing 1 causes output Y to enter the power down mode specified
  501. by the corresponding outY_powerdown_mode. DAC output stage is
  502. disconnected from the amplifier. Clearing returns to normal
  503. operation. Y may be suppressed if all outputs are controlled
  504. together.
  505. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
  506. KernelVersion: 3.4.0
  507. Contact: linux-iio@vger.kernel.org
  508. Description:
  509. Output frequency for channel Y in Hz. The number must always be
  510. specified and unique if the output corresponds to a single
  511. channel.
  512. What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
  513. KernelVersion: 3.4.0
  514. Contact: linux-iio@vger.kernel.org
  515. Description:
  516. Phase in radians of one frequency/clock output Y
  517. (out_altvoltageY) relative to another frequency/clock output
  518. (out_altvoltageZ) of the device X. The number must always be
  519. specified and unique if the output corresponds to a single
  520. channel.
  521. What: /sys/bus/iio/devices/iio:deviceX/events
  522. KernelVersion: 2.6.35
  523. Contact: linux-iio@vger.kernel.org
  524. Description:
  525. Configuration of which hardware generated events are passed up
  526. to user-space.
  527. What: /sys/.../iio:deviceX/events/in_accel_x_thresh_rising_en
  528. What: /sys/.../iio:deviceX/events/in_accel_x_thresh_falling_en
  529. What: /sys/.../iio:deviceX/events/in_accel_y_thresh_rising_en
  530. What: /sys/.../iio:deviceX/events/in_accel_y_thresh_falling_en
  531. What: /sys/.../iio:deviceX/events/in_accel_z_thresh_rising_en
  532. What: /sys/.../iio:deviceX/events/in_accel_z_thresh_falling_en
  533. What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_rising_en
  534. What: /sys/.../iio:deviceX/events/in_anglvel_x_thresh_falling_en
  535. What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_rising_en
  536. What: /sys/.../iio:deviceX/events/in_anglvel_y_thresh_falling_en
  537. What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_rising_en
  538. What: /sys/.../iio:deviceX/events/in_anglvel_z_thresh_falling_en
  539. What: /sys/.../iio:deviceX/events/in_magn_x_thresh_rising_en
  540. What: /sys/.../iio:deviceX/events/in_magn_x_thresh_falling_en
  541. What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
  542. What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
  543. What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
  544. What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
  545. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_rising_en
  546. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_thresh_falling_en
  547. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_rising_en
  548. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_thresh_falling_en
  549. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_en
  550. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_en
  551. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_rising_en
  552. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_thresh_falling_en
  553. What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
  554. What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
  555. What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
  556. What: /sys/.../iio:deviceX/events/in_voltageY_thresh_falling_en
  557. What: /sys/.../iio:deviceX/events/in_voltageY_thresh_either_en
  558. What: /sys/.../iio:deviceX/events/in_tempY_thresh_rising_en
  559. What: /sys/.../iio:deviceX/events/in_tempY_thresh_falling_en
  560. KernelVersion: 2.6.37
  561. Contact: linux-iio@vger.kernel.org
  562. Description:
  563. Event generated when channel passes a threshold in the specified
  564. (_rising|_falling) direction. If the direction is not specified,
  565. then either the device will report an event which ever direction
  566. a single threshold value is passed in (e.g.
  567. <type>[Y][_name]_<raw|input>_thresh_value) or
  568. <type>[Y][_name]_<raw|input>_thresh_rising_value and
  569. <type>[Y][_name]_<raw|input>_thresh_falling_value may take
  570. different values, but the device can only enable both thresholds
  571. or neither.
  572. Note the driver will assume the last p events requested are
  573. to be enabled where p is how many it supports (which may vary
  574. depending on the exact set requested. So if you want to be
  575. sure you have set what you think you have, check the contents of
  576. these attributes after everything is configured. Drivers may
  577. have to buffer any parameters so that they are consistent when
  578. a given event type is enabled at a future point (and not those for
  579. whatever event was previously enabled).
  580. What: /sys/.../iio:deviceX/events/in_accel_x_roc_rising_en
  581. What: /sys/.../iio:deviceX/events/in_accel_x_roc_falling_en
  582. What: /sys/.../iio:deviceX/events/in_accel_y_roc_rising_en
  583. What: /sys/.../iio:deviceX/events/in_accel_y_roc_falling_en
  584. What: /sys/.../iio:deviceX/events/in_accel_z_roc_rising_en
  585. What: /sys/.../iio:deviceX/events/in_accel_z_roc_falling_en
  586. What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_rising_en
  587. What: /sys/.../iio:deviceX/events/in_anglvel_x_roc_falling_en
  588. What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_rising_en
  589. What: /sys/.../iio:deviceX/events/in_anglvel_y_roc_falling_en
  590. What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_rising_en
  591. What: /sys/.../iio:deviceX/events/in_anglvel_z_roc_falling_en
  592. What: /sys/.../iio:deviceX/events/in_magn_x_roc_rising_en
  593. What: /sys/.../iio:deviceX/events/in_magn_x_roc_falling_en
  594. What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
  595. What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
  596. What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
  597. What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
  598. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_rising_en
  599. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_roc_falling_en
  600. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_rising_en
  601. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_roc_falling_en
  602. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_rising_en
  603. What: /sys/.../iio:deviceX/events/in_rot_from_north_magnetic_tilt_comp_roc_falling_en
  604. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_rising_en
  605. What: /sys/.../iio:deviceX/events/in_rot_from_north_true_tilt_comp_roc_falling_en
  606. What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
  607. What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
  608. What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
  609. What: /sys/.../iio:deviceX/events/in_voltageY_roc_falling_en
  610. What: /sys/.../iio:deviceX/events/in_tempY_roc_rising_en
  611. What: /sys/.../iio:deviceX/events/in_tempY_roc_falling_en
  612. KernelVersion: 2.6.37
  613. Contact: linux-iio@vger.kernel.org
  614. Description:
  615. Event generated when channel passes a threshold on the rate of
  616. change (1st differential) in the specified (_rising|_falling)
  617. direction. If the direction is not specified, then either the
  618. device will report an event which ever direction a single
  619. threshold value is passed in (e.g.
  620. <type>[Y][_name]_<raw|input>_roc_value) or
  621. <type>[Y][_name]_<raw|input>_roc_rising_value and
  622. <type>[Y][_name]_<raw|input>_roc_falling_value may take
  623. different values, but the device can only enable both rate of
  624. change thresholds or neither.
  625. Note the driver will assume the last p events requested are
  626. to be enabled where p is however many it supports (which may
  627. vary depending on the exact set requested. So if you want to be
  628. sure you have set what you think you have, check the contents of
  629. these attributes after everything is configured. Drivers may
  630. have to buffer any parameters so that they are consistent when
  631. a given event type is enabled a future point (and not those for
  632. whatever event was previously enabled).
  633. What: /sys/.../events/in_accel_thresh_rising_value
  634. What: /sys/.../events/in_accel_thresh_falling_value
  635. What: /sys/.../events/in_accel_x_raw_thresh_rising_value
  636. What: /sys/.../events/in_accel_x_raw_thresh_falling_value
  637. What: /sys/.../events/in_accel_y_raw_thresh_rising_value
  638. What: /sys/.../events/in_accel_y_raw_thresh_falling_value
  639. What: /sys/.../events/in_accel_z_raw_thresh_rising_value
  640. What: /sys/.../events/in_accel_z_raw_thresh_falling_value
  641. What: /sys/.../events/in_anglvel_x_raw_thresh_rising_value
  642. What: /sys/.../events/in_anglvel_x_raw_thresh_falling_value
  643. What: /sys/.../events/in_anglvel_y_raw_thresh_rising_value
  644. What: /sys/.../events/in_anglvel_y_raw_thresh_falling_value
  645. What: /sys/.../events/in_anglvel_z_raw_thresh_rising_value
  646. What: /sys/.../events/in_anglvel_z_raw_thresh_falling_value
  647. What: /sys/.../events/in_magn_x_raw_thresh_rising_value
  648. What: /sys/.../events/in_magn_x_raw_thresh_falling_value
  649. What: /sys/.../events/in_magn_y_raw_thresh_rising_value
  650. What: /sys/.../events/in_magn_y_raw_thresh_falling_value
  651. What: /sys/.../events/in_magn_z_raw_thresh_rising_value
  652. What: /sys/.../events/in_magn_z_raw_thresh_falling_value
  653. What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_rising_value
  654. What: /sys/.../events/in_rot_from_north_magnetic_raw_thresh_falling_value
  655. What: /sys/.../events/in_rot_from_north_true_raw_thresh_rising_value
  656. What: /sys/.../events/in_rot_from_north_true_raw_thresh_falling_value
  657. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_rising_value
  658. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_thresh_falling_value
  659. What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_rising_value
  660. What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_thresh_falling_value
  661. What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
  662. What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
  663. What: /sys/.../events/in_voltageY_raw_thresh_rising_value
  664. What: /sys/.../events/in_voltageY_raw_thresh_falling_value
  665. What: /sys/.../events/in_tempY_raw_thresh_rising_value
  666. What: /sys/.../events/in_tempY_raw_thresh_falling_value
  667. What: /sys/.../events/in_illuminance0_thresh_falling_value
  668. what: /sys/.../events/in_illuminance0_thresh_rising_value
  669. what: /sys/.../events/in_proximity0_thresh_falling_value
  670. what: /sys/.../events/in_proximity0_thresh_rising_value
  671. KernelVersion: 2.6.37
  672. Contact: linux-iio@vger.kernel.org
  673. Description:
  674. Specifies the value of threshold that the device is comparing
  675. against for the events enabled by
  676. <type>Y[_name]_thresh[_rising|falling]_en.
  677. If separate attributes exist for the two directions, but
  678. direction is not specified for this attribute, then a single
  679. threshold value applies to both directions.
  680. The raw or input element of the name indicates whether the
  681. value is in raw device units or in processed units (as _raw
  682. and _input do on sysfs direct channel read attributes).
  683. What: /sys/.../events/in_accel_scale
  684. What: /sys/.../events/in_accel_peak_scale
  685. What: /sys/.../events/in_anglvel_scale
  686. What: /sys/.../events/in_magn_scale
  687. What: /sys/.../events/in_rot_from_north_magnetic_scale
  688. What: /sys/.../events/in_rot_from_north_true_scale
  689. What: /sys/.../events/in_voltage_scale
  690. What: /sys/.../events/in_voltage_supply_scale
  691. What: /sys/.../events/in_temp_scale
  692. What: /sys/.../events/in_illuminance_scale
  693. What: /sys/.../events/in_proximity_scale
  694. KernelVersion: 3.21
  695. Contact: linux-iio@vger.kernel.org
  696. Description:
  697. Specifies the conversion factor from the standard units
  698. to device specific units used to set the event trigger
  699. threshold.
  700. What: /sys/.../events/in_accel_x_thresh_rising_hysteresis
  701. What: /sys/.../events/in_accel_x_thresh_falling_hysteresis
  702. What: /sys/.../events/in_accel_x_thresh_either_hysteresis
  703. What: /sys/.../events/in_accel_y_thresh_rising_hysteresis
  704. What: /sys/.../events/in_accel_y_thresh_falling_hysteresis
  705. What: /sys/.../events/in_accel_y_thresh_either_hysteresis
  706. What: /sys/.../events/in_accel_z_thresh_rising_hysteresis
  707. What: /sys/.../events/in_accel_z_thresh_falling_hysteresis
  708. What: /sys/.../events/in_accel_z_thresh_either_hysteresis
  709. What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis
  710. What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis
  711. What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis
  712. What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis
  713. What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis
  714. What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis
  715. What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis
  716. What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis
  717. What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis
  718. What: /sys/.../events/in_magn_x_thresh_rising_hysteresis
  719. What: /sys/.../events/in_magn_x_thresh_falling_hysteresis
  720. What: /sys/.../events/in_magn_x_thresh_either_hysteresis
  721. What: /sys/.../events/in_magn_y_thresh_rising_hysteresis
  722. What: /sys/.../events/in_magn_y_thresh_falling_hysteresis
  723. What: /sys/.../events/in_magn_y_thresh_either_hysteresis
  724. What: /sys/.../events/in_magn_z_thresh_rising_hysteresis
  725. What: /sys/.../events/in_magn_z_thresh_falling_hysteresis
  726. What: /sys/.../events/in_magn_z_thresh_either_hysteresis
  727. What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_hysteresis
  728. What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_hysteresis
  729. What: /sys/.../events/in_rot_from_north_magnetic_thresh_either_hysteresis
  730. What: /sys/.../events/in_rot_from_north_true_thresh_rising_hysteresis
  731. What: /sys/.../events/in_rot_from_north_true_thresh_falling_hysteresis
  732. What: /sys/.../events/in_rot_from_north_true_thresh_either_hysteresis
  733. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_hysteresis
  734. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_hysteresis
  735. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_either_hysteresis
  736. What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_hysteresis
  737. What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_hysteresis
  738. What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_either_hysteresis
  739. What: /sys/.../events/in_voltageY_thresh_rising_hysteresis
  740. What: /sys/.../events/in_voltageY_thresh_falling_hysteresis
  741. What: /sys/.../events/in_voltageY_thresh_either_hysteresis
  742. What: /sys/.../events/in_tempY_thresh_rising_hysteresis
  743. What: /sys/.../events/in_tempY_thresh_falling_hysteresis
  744. What: /sys/.../events/in_tempY_thresh_either_hysteresis
  745. What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis
  746. what: /sys/.../events/in_illuminance0_thresh_rising_hysteresis
  747. what: /sys/.../events/in_illuminance0_thresh_either_hysteresis
  748. what: /sys/.../events/in_proximity0_thresh_falling_hysteresis
  749. what: /sys/.../events/in_proximity0_thresh_rising_hysteresis
  750. what: /sys/.../events/in_proximity0_thresh_either_hysteresis
  751. KernelVersion: 3.13
  752. Contact: linux-iio@vger.kernel.org
  753. Description:
  754. Specifies the hysteresis of threshold that the device is comparing
  755. against for the events enabled by
  756. <type>Y[_name]_thresh[_(rising|falling)]_hysteresis.
  757. If separate attributes exist for the two directions, but
  758. direction is not specified for this attribute, then a single
  759. hysteresis value applies to both directions.
  760. For falling events the hysteresis is added to the _value attribute for
  761. this event to get the upper threshold for when the event goes back to
  762. normal, for rising events the hysteresis is subtracted from the _value
  763. attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200
  764. and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event
  765. will get activated once in_voltage0_raw goes above 1200 and will become
  766. deactivated again once the value falls below 1150.
  767. What: /sys/.../events/in_accel_x_raw_roc_rising_value
  768. What: /sys/.../events/in_accel_x_raw_roc_falling_value
  769. What: /sys/.../events/in_accel_y_raw_roc_rising_value
  770. What: /sys/.../events/in_accel_y_raw_roc_falling_value
  771. What: /sys/.../events/in_accel_z_raw_roc_rising_value
  772. What: /sys/.../events/in_accel_z_raw_roc_falling_value
  773. What: /sys/.../events/in_anglvel_x_raw_roc_rising_value
  774. What: /sys/.../events/in_anglvel_x_raw_roc_falling_value
  775. What: /sys/.../events/in_anglvel_y_raw_roc_rising_value
  776. What: /sys/.../events/in_anglvel_y_raw_roc_falling_value
  777. What: /sys/.../events/in_anglvel_z_raw_roc_rising_value
  778. What: /sys/.../events/in_anglvel_z_raw_roc_falling_value
  779. What: /sys/.../events/in_magn_x_raw_roc_rising_value
  780. What: /sys/.../events/in_magn_x_raw_roc_falling_value
  781. What: /sys/.../events/in_magn_y_raw_roc_rising_value
  782. What: /sys/.../events/in_magn_y_raw_roc_falling_value
  783. What: /sys/.../events/in_magn_z_raw_roc_rising_value
  784. What: /sys/.../events/in_magn_z_raw_roc_falling_value
  785. What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_rising_value
  786. What: /sys/.../events/in_rot_from_north_magnetic_raw_roc_falling_value
  787. What: /sys/.../events/in_rot_from_north_true_raw_roc_rising_value
  788. What: /sys/.../events/in_rot_from_north_true_raw_roc_falling_value
  789. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_rising_value
  790. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_raw_roc_falling_value
  791. What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_rising_value
  792. What: /sys/.../events/in_rot_from_north_true_tilt_comp_raw_roc_falling_value
  793. What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value
  794. What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value
  795. What: /sys/.../events/in_voltageY_raw_roc_rising_value
  796. What: /sys/.../events/in_voltageY_raw_roc_falling_value
  797. What: /sys/.../events/in_tempY_raw_roc_rising_value
  798. What: /sys/.../events/in_tempY_raw_roc_falling_value
  799. KernelVersion: 2.6.37
  800. Contact: linux-iio@vger.kernel.org
  801. Description:
  802. Specifies the value of rate of change threshold that the
  803. device is comparing against for the events enabled by
  804. <type>[Y][_name]_roc[_rising|falling]_en.
  805. If separate attributes exist for the two directions,
  806. but direction is not specified for this attribute,
  807. then a single threshold value applies to both directions.
  808. The raw or input element of the name indicates whether the
  809. value is in raw device units or in processed units (as _raw
  810. and _input do on sysfs direct channel read attributes).
  811. What: /sys/.../events/in_accel_x_thresh_rising_period
  812. What: /sys/.../events/in_accel_x_thresh_falling_period
  813. What: /sys/.../events/in_accel_x_roc_rising_period
  814. What: /sys/.../events/in_accel_x_roc_falling_period
  815. What: /sys/.../events/in_accel_y_thresh_rising_period
  816. What: /sys/.../events/in_accel_y_thresh_falling_period
  817. What: /sys/.../events/in_accel_y_roc_rising_period
  818. What: /sys/.../events/in_accel_y_roc_falling_period
  819. What: /sys/.../events/in_accel_z_thresh_rising_period
  820. What: /sys/.../events/in_accel_z_thresh_falling_period
  821. What: /sys/.../events/in_accel_z_roc_rising_period
  822. What: /sys/.../events/in_accel_z_roc_falling_period
  823. What: /sys/.../events/in_anglvel_x_thresh_rising_period
  824. What: /sys/.../events/in_anglvel_x_thresh_falling_period
  825. What: /sys/.../events/in_anglvel_x_roc_rising_period
  826. What: /sys/.../events/in_anglvel_x_roc_falling_period
  827. What: /sys/.../events/in_anglvel_y_thresh_rising_period
  828. What: /sys/.../events/in_anglvel_y_thresh_falling_period
  829. What: /sys/.../events/in_anglvel_y_roc_rising_period
  830. What: /sys/.../events/in_anglvel_y_roc_falling_period
  831. What: /sys/.../events/in_anglvel_z_thresh_rising_period
  832. What: /sys/.../events/in_anglvel_z_thresh_falling_period
  833. What: /sys/.../events/in_anglvel_z_roc_rising_period
  834. What: /sys/.../events/in_anglvel_z_roc_falling_period
  835. What: /sys/.../events/in_magn_x_thresh_rising_period
  836. What: /sys/.../events/in_magn_x_thresh_falling_period
  837. What: /sys/.../events/in_magn_x_roc_rising_period
  838. What: /sys/.../events/in_magn_x_roc_falling_period
  839. What: /sys/.../events/in_magn_y_thresh_rising_period
  840. What: /sys/.../events/in_magn_y_thresh_falling_period
  841. What: /sys/.../events/in_magn_y_roc_rising_period
  842. What: /sys/.../events/in_magn_y_roc_falling_period
  843. What: /sys/.../events/in_magn_z_thresh_rising_period
  844. What: /sys/.../events/in_magn_z_thresh_falling_period
  845. What: /sys/.../events/in_magn_z_roc_rising_period
  846. What: /sys/.../events/in_magn_z_roc_falling_period
  847. What: /sys/.../events/in_rot_from_north_magnetic_thresh_rising_period
  848. What: /sys/.../events/in_rot_from_north_magnetic_thresh_falling_period
  849. What: /sys/.../events/in_rot_from_north_magnetic_roc_rising_period
  850. What: /sys/.../events/in_rot_from_north_magnetic_roc_falling_period
  851. What: /sys/.../events/in_rot_from_north_true_thresh_rising_period
  852. What: /sys/.../events/in_rot_from_north_true_thresh_falling_period
  853. What: /sys/.../events/in_rot_from_north_true_roc_rising_period
  854. What: /sys/.../events/in_rot_from_north_true_roc_falling_period
  855. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_rising_period
  856. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_thresh_falling_period
  857. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_rising_period
  858. What: /sys/.../events/in_rot_from_north_magnetic_tilt_comp_roc_falling_period
  859. What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_rising_period
  860. What: /sys/.../events/in_rot_from_north_true_tilt_comp_thresh_falling_period
  861. What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_rising_period
  862. What: /sys/.../events/in_rot_from_north_true_tilt_comp_roc_falling_period
  863. What: /sys/.../events/in_voltageY_supply_thresh_rising_period
  864. What: /sys/.../events/in_voltageY_supply_thresh_falling_period
  865. What: /sys/.../events/in_voltageY_supply_roc_rising_period
  866. What: /sys/.../events/in_voltageY_supply_roc_falling_period
  867. What: /sys/.../events/in_voltageY_thresh_rising_period
  868. What: /sys/.../events/in_voltageY_thresh_falling_period
  869. What: /sys/.../events/in_voltageY_roc_rising_period
  870. What: /sys/.../events/in_voltageY_roc_falling_period
  871. What: /sys/.../events/in_tempY_thresh_rising_period
  872. What: /sys/.../events/in_tempY_thresh_falling_period
  873. What: /sys/.../events/in_tempY_roc_rising_period
  874. What: /sys/.../events/in_tempY_roc_falling_period
  875. What: /sys/.../events/in_accel_x&y&z_mag_falling_period
  876. What: /sys/.../events/in_intensity0_thresh_period
  877. What: /sys/.../events/in_proximity0_thresh_period
  878. What: /sys/.../events/in_activity_still_thresh_rising_period
  879. What: /sys/.../events/in_activity_still_thresh_falling_period
  880. What: /sys/.../events/in_activity_walking_thresh_rising_period
  881. What: /sys/.../events/in_activity_walking_thresh_falling_period
  882. What: /sys/.../events/in_activity_jogging_thresh_rising_period
  883. What: /sys/.../events/in_activity_jogging_thresh_falling_period
  884. What: /sys/.../events/in_activity_running_thresh_rising_period
  885. What: /sys/.../events/in_activity_running_thresh_falling_period
  886. KernelVersion: 2.6.37
  887. Contact: linux-iio@vger.kernel.org
  888. Description:
  889. Period of time (in seconds) for which the condition must be
  890. met before an event is generated. If direction is not
  891. specified then this period applies to both directions.
  892. What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
  893. What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
  894. What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
  895. KernelVersion: 4.2
  896. Contact: linux-iio@vger.kernel.org
  897. Description:
  898. If a low pass filter can be applied to the event generation
  899. this property gives its 3db frequency in Hz.
  900. A value of zero disables the filter.
  901. What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
  902. What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
  903. What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
  904. KernelVersion: 4.2
  905. Contact: linux-iio@vger.kernel.org
  906. Description:
  907. If a high pass filter can be applied to the event generation
  908. this property gives its 3db frequency in Hz.
  909. A value of zero disables the filter.
  910. What: /sys/.../events/in_activity_still_thresh_rising_en
  911. What: /sys/.../events/in_activity_still_thresh_falling_en
  912. What: /sys/.../events/in_activity_walking_thresh_rising_en
  913. What: /sys/.../events/in_activity_walking_thresh_falling_en
  914. What: /sys/.../events/in_activity_jogging_thresh_rising_en
  915. What: /sys/.../events/in_activity_jogging_thresh_falling_en
  916. What: /sys/.../events/in_activity_running_thresh_rising_en
  917. What: /sys/.../events/in_activity_running_thresh_falling_en
  918. KernelVersion: 3.19
  919. Contact: linux-iio@vger.kernel.org
  920. Description:
  921. Enables or disables activitity events. Depending on direction
  922. an event is generated when sensor ENTERS or LEAVES a given state.
  923. What: /sys/.../events/in_activity_still_thresh_rising_value
  924. What: /sys/.../events/in_activity_still_thresh_falling_value
  925. What: /sys/.../events/in_activity_walking_thresh_rising_value
  926. What: /sys/.../events/in_activity_walking_thresh_falling_value
  927. What: /sys/.../events/in_activity_jogging_thresh_rising_value
  928. What: /sys/.../events/in_activity_jogging_thresh_falling_value
  929. What: /sys/.../events/in_activity_running_thresh_rising_value
  930. What: /sys/.../events/in_activity_running_thresh_falling_value
  931. KernelVersion: 3.19
  932. Contact: linux-iio@vger.kernel.org
  933. Description:
  934. Confidence value (in units as percentage) to be used
  935. for deciding when an event should be generated. E.g for
  936. running: If the confidence value reported by the sensor
  937. is greater than in_activity_running_thresh_rising_value
  938. then the sensor ENTERS running state. Conversely, if the
  939. confidence value reported by the sensor is lower than
  940. in_activity_running_thresh_falling_value then the sensor
  941. is LEAVING running state.
  942. What: /sys/.../iio:deviceX/events/in_accel_mag_en
  943. What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
  944. What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
  945. What: /sys/.../iio:deviceX/events/in_accel_x_mag_en
  946. What: /sys/.../iio:deviceX/events/in_accel_x_mag_rising_en
  947. What: /sys/.../iio:deviceX/events/in_accel_x_mag_falling_en
  948. What: /sys/.../iio:deviceX/events/in_accel_y_mag_en
  949. What: /sys/.../iio:deviceX/events/in_accel_y_mag_rising_en
  950. What: /sys/.../iio:deviceX/events/in_accel_y_mag_falling_en
  951. What: /sys/.../iio:deviceX/events/in_accel_z_mag_en
  952. What: /sys/.../iio:deviceX/events/in_accel_z_mag_rising_en
  953. What: /sys/.../iio:deviceX/events/in_accel_z_mag_falling_en
  954. What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_rising_en
  955. What: /sys/.../iio:deviceX/events/in_accel_x&y&z_mag_falling_en
  956. KernelVersion: 2.6.37
  957. Contact: linux-iio@vger.kernel.org
  958. Description:
  959. Similar to in_accel_x_thresh[_rising|_falling]_en, but here the
  960. magnitude of the channel is compared to the threshold, not its
  961. signed value.
  962. What: /sys/.../events/in_accel_raw_mag_value
  963. What: /sys/.../events/in_accel_x_raw_mag_rising_value
  964. What: /sys/.../events/in_accel_y_raw_mag_rising_value
  965. What: /sys/.../events/in_accel_z_raw_mag_rising_value
  966. KernelVersion: 2.6.37
  967. Contact: linux-iio@vger.kernel.org
  968. Description:
  969. The value to which the magnitude of the channel is compared. If
  970. number or direction is not specified, applies to all channels of
  971. this type.
  972. What: /sys/.../events/in_steps_change_en
  973. KernelVersion: 4.0
  974. Contact: linux-iio@vger.kernel.org
  975. Description:
  976. Event generated when channel passes a threshold on the absolute
  977. change in value. E.g. for steps: a step change event is
  978. generated each time the user takes N steps, where N is set using
  979. in_steps_change_value.
  980. What: /sys/.../events/in_steps_change_value
  981. KernelVersion: 4.0
  982. Contact: linux-iio@vger.kernel.org
  983. Description:
  984. Specifies the value of change threshold that the
  985. device is comparing against for the events enabled by
  986. <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps:
  987. if set to 3, a step change event will be generated every 3
  988. steps.
  989. What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
  990. KernelVersion: 2.6.35
  991. Contact: linux-iio@vger.kernel.org
  992. Description:
  993. The name of the trigger source being used, as per string given
  994. in /sys/class/iio/triggerY/name.
  995. What: /sys/bus/iio/devices/iio:deviceX/buffer/length
  996. KernelVersion: 2.6.35
  997. Contact: linux-iio@vger.kernel.org
  998. Description:
  999. Number of scans contained by the buffer.
  1000. What: /sys/bus/iio/devices/iio:deviceX/buffer/enable
  1001. KernelVersion: 2.6.35
  1002. Contact: linux-iio@vger.kernel.org
  1003. Description:
  1004. Actually start the buffer capture up. Will start trigger
  1005. if first device and appropriate.
  1006. What: /sys/bus/iio/devices/iio:deviceX/scan_elements
  1007. KernelVersion: 2.6.37
  1008. Contact: linux-iio@vger.kernel.org
  1009. Description:
  1010. Directory containing interfaces for elements that will be
  1011. captured for a single triggered sample set in the buffer.
  1012. What: /sys/.../iio:deviceX/scan_elements/in_accel_x_en
  1013. What: /sys/.../iio:deviceX/scan_elements/in_accel_y_en
  1014. What: /sys/.../iio:deviceX/scan_elements/in_accel_z_en
  1015. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
  1016. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
  1017. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
  1018. What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
  1019. What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
  1020. What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
  1021. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
  1022. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
  1023. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
  1024. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
  1025. What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
  1026. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
  1027. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
  1028. What: /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
  1029. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
  1030. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
  1031. What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
  1032. What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
  1033. What: /sys/.../iio:deviceX/scan_elements/in_incli_x_en
  1034. What: /sys/.../iio:deviceX/scan_elements/in_incli_y_en
  1035. What: /sys/.../iio:deviceX/scan_elements/in_pressureY_en
  1036. What: /sys/.../iio:deviceX/scan_elements/in_pressure_en
  1037. What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
  1038. What: /sys/.../iio:deviceX/scan_elements/in_proximity_en
  1039. KernelVersion: 2.6.37
  1040. Contact: linux-iio@vger.kernel.org
  1041. Description:
  1042. Scan element control for triggered data capture.
  1043. What: /sys/.../iio:deviceX/scan_elements/in_accel_type
  1044. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_type
  1045. What: /sys/.../iio:deviceX/scan_elements/in_magn_type
  1046. What: /sys/.../iio:deviceX/scan_elements/in_incli_type
  1047. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_type
  1048. What: /sys/.../iio:deviceX/scan_elements/in_voltage_type
  1049. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
  1050. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
  1051. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
  1052. What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_type
  1053. What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_type
  1054. What: /sys/.../iio:deviceX/scan_elements/in_timestamp_type
  1055. What: /sys/.../iio:deviceX/scan_elements/in_pressureY_type
  1056. What: /sys/.../iio:deviceX/scan_elements/in_pressure_type
  1057. What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
  1058. What: /sys/.../iio:deviceX/scan_elements/in_proximity_type
  1059. KernelVersion: 2.6.37
  1060. Contact: linux-iio@vger.kernel.org
  1061. Description:
  1062. Description of the scan element data storage within the buffer
  1063. and hence the form in which it is read from user-space.
  1064. Form is [be|le]:[s|u]bits/storagebits[>>shift].
  1065. be or le specifies big or little endian. s or u specifies if
  1066. signed (2's complement) or unsigned. bits is the number of bits
  1067. of data and storagebits is the space (after padding) that it
  1068. occupies in the buffer. shift if specified, is the shift that
  1069. needs to be applied prior to masking out unused bits. Some
  1070. devices put their data in the middle of the transferred elements
  1071. with additional information on both sides. Note that some
  1072. devices will have additional information in the unused bits
  1073. so to get a clean value, the bits value must be used to mask
  1074. the buffer output value appropriately. The storagebits value
  1075. also specifies the data alignment. So s48/64>>2 will be a
  1076. signed 48 bit integer stored in a 64 bit location aligned to
  1077. a 64 bit boundary. To obtain the clean value, shift right 2
  1078. and apply a mask to zero the top 16 bits of the result.
  1079. For other storage combinations this attribute will be extended
  1080. appropriately.
  1081. What: /sys/.../iio:deviceX/scan_elements/in_accel_type_available
  1082. KernelVersion: 2.6.37
  1083. Contact: linux-iio@vger.kernel.org
  1084. Description:
  1085. If the type parameter can take one of a small set of values,
  1086. this attribute lists them.
  1087. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_index
  1088. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
  1089. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
  1090. What: /sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
  1091. What: /sys/.../iio:deviceX/scan_elements/in_voltage_i_index
  1092. What: /sys/.../iio:deviceX/scan_elements/in_voltage_q_index
  1093. What: /sys/.../iio:deviceX/scan_elements/in_accel_x_index
  1094. What: /sys/.../iio:deviceX/scan_elements/in_accel_y_index
  1095. What: /sys/.../iio:deviceX/scan_elements/in_accel_z_index
  1096. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_x_index
  1097. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_y_index
  1098. What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
  1099. What: /sys/.../iio:deviceX/scan_elements/in_magn_x_index
  1100. What: /sys/.../iio:deviceX/scan_elements/in_magn_y_index
  1101. What: /sys/.../iio:deviceX/scan_elements/in_magn_z_index
  1102. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_index
  1103. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_index
  1104. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_index
  1105. What: /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_index
  1106. What: /sys/.../iio:deviceX/scan_elements/in_incli_x_index
  1107. What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
  1108. What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index
  1109. What: /sys/.../iio:deviceX/scan_elements/in_pressureY_index
  1110. What: /sys/.../iio:deviceX/scan_elements/in_pressure_index
  1111. What: /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
  1112. What: /sys/.../iio:deviceX/scan_elements/in_proximity_index
  1113. KernelVersion: 2.6.37
  1114. Contact: linux-iio@vger.kernel.org
  1115. Description:
  1116. A single positive integer specifying the position of this
  1117. scan element in the buffer. Note these are not dependent on
  1118. what is enabled and may not be contiguous. Thus for user-space
  1119. to establish the full layout these must be used in conjunction
  1120. with all _en attributes to establish which channels are present,
  1121. and the relevant _type attributes to establish the data storage
  1122. format.
  1123. What: /sys/.../iio:deviceX/in_activity_still_input
  1124. What: /sys/.../iio:deviceX/in_activity_walking_input
  1125. What: /sys/.../iio:deviceX/in_activity_jogging_input
  1126. What: /sys/.../iio:deviceX/in_activity_running_input
  1127. KernelVersion: 3.19
  1128. Contact: linux-iio@vger.kernel.org
  1129. Description:
  1130. This attribute is used to read the confidence for an activity
  1131. expressed in units as percentage.
  1132. What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
  1133. KernelVersion: 2.6.38
  1134. Contact: linux-iio@vger.kernel.org
  1135. Description:
  1136. This attribute is used to read the amount of quadrature error
  1137. present in the device at a given time.
  1138. What: /sys/.../iio:deviceX/in_accelX_power_mode
  1139. KernelVersion: 3.11
  1140. Contact: linux-iio@vger.kernel.org
  1141. Description:
  1142. Specifies the chip power mode.
  1143. low_noise: reduce noise level from ADC,
  1144. low_power: enable low current consumption.
  1145. For a list of available output power modes read
  1146. in_accel_power_mode_available.
  1147. What: /sys/.../iio:deviceX/in_energy_input
  1148. What: /sys/.../iio:deviceX/in_energy_raw
  1149. KernelVersion: 4.0
  1150. Contact: linux-iio@vger.kernel.org
  1151. Description:
  1152. This attribute is used to read the energy value reported by the
  1153. device (e.g.: human activity sensors report energy burnt by the
  1154. user). Units after application of scale are Joules.
  1155. What: /sys/.../iio:deviceX/in_distance_input
  1156. What: /sys/.../iio:deviceX/in_distance_raw
  1157. KernelVersion: 4.0
  1158. Contact: linux-iio@vger.kernel.org
  1159. Description:
  1160. This attribute is used to read the distance covered by the user
  1161. since the last reboot while activated. Units after application
  1162. of scale are meters.
  1163. What: /sys/bus/iio/devices/iio:deviceX/store_eeprom
  1164. KernelVersion: 3.4.0
  1165. Contact: linux-iio@vger.kernel.org
  1166. Description:
  1167. Writing '1' stores the current device configuration into
  1168. on-chip EEPROM. After power-up or chip reset the device will
  1169. automatically load the saved configuration.
  1170. What: /sys/.../iio:deviceX/in_proximity_raw
  1171. What: /sys/.../iio:deviceX/in_proximity_input
  1172. What: /sys/.../iio:deviceX/in_proximityY_raw
  1173. KernelVersion: 3.4
  1174. Contact: linux-iio@vger.kernel.org
  1175. Description:
  1176. Proximity measurement indicating that some
  1177. object is near the sensor, usually by observing
  1178. reflectivity of infrared or ultrasound emitted.
  1179. Often these sensors are unit less and as such conversion
  1180. to SI units is not possible. Higher proximity measurements
  1181. indicate closer objects, and vice versa. Units after
  1182. application of scale and offset are meters.
  1183. What: /sys/.../iio:deviceX/in_illuminance_input
  1184. What: /sys/.../iio:deviceX/in_illuminance_raw
  1185. What: /sys/.../iio:deviceX/in_illuminanceY_input
  1186. What: /sys/.../iio:deviceX/in_illuminanceY_raw
  1187. What: /sys/.../iio:deviceX/in_illuminanceY_mean_raw
  1188. What: /sys/.../iio:deviceX/in_illuminance_ir_raw
  1189. What: /sys/.../iio:deviceX/in_illuminance_clear_raw
  1190. KernelVersion: 3.4
  1191. Contact: linux-iio@vger.kernel.org
  1192. Description:
  1193. Illuminance measurement, units after application of scale
  1194. and offset are lux.
  1195. What: /sys/.../iio:deviceX/in_intensityY_raw
  1196. What: /sys/.../iio:deviceX/in_intensityY_ir_raw
  1197. What: /sys/.../iio:deviceX/in_intensityY_both_raw
  1198. What: /sys/.../iio:deviceX/in_intensityY_uv_raw
  1199. KernelVersion: 3.4
  1200. Contact: linux-iio@vger.kernel.org
  1201. Description:
  1202. Unit-less light intensity. Modifiers both and ir indicate
  1203. that measurements contains visible and infrared light
  1204. components or just infrared light, respectively. Modifier uv indicates
  1205. that measurements contain ultraviolet light components.
  1206. What: /sys/.../iio:deviceX/in_uvindex_input
  1207. KernelVersion: 4.6
  1208. Contact: linux-iio@vger.kernel.org
  1209. Description:
  1210. UV light intensity index measuring the human skin's response to
  1211. different wavelength of sunlight weighted according to the
  1212. standardised CIE Erythemal Action Spectrum. UV index values range
  1213. from 0 (low) to >=11 (extreme).
  1214. What: /sys/.../iio:deviceX/in_intensity_red_integration_time
  1215. What: /sys/.../iio:deviceX/in_intensity_green_integration_time
  1216. What: /sys/.../iio:deviceX/in_intensity_blue_integration_time
  1217. What: /sys/.../iio:deviceX/in_intensity_clear_integration_time
  1218. What: /sys/.../iio:deviceX/in_illuminance_integration_time
  1219. KernelVersion: 3.12
  1220. Contact: linux-iio@vger.kernel.org
  1221. Description:
  1222. This attribute is used to get/set the integration time in
  1223. seconds.
  1224. What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
  1225. KernelVersion: 4.0
  1226. Contact: linux-iio@vger.kernel.org
  1227. Description:
  1228. Number of seconds in which to compute speed.
  1229. What: /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
  1230. KernelVersion: 3.15
  1231. Contact: linux-iio@vger.kernel.org
  1232. Description:
  1233. Raw value of quaternion components using a format
  1234. x y z w. Here x, y, and z component represents the axis about
  1235. which a rotation will occur and w component represents the
  1236. amount of rotation.
  1237. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_tilt_comp_raw
  1238. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_raw
  1239. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_magnetic_raw
  1240. What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_raw
  1241. KernelVersion: 3.15
  1242. Contact: linux-iio@vger.kernel.org
  1243. Description:
  1244. Raw value of rotation from true/magnetic north measured with
  1245. or without compensation from tilt sensors.
  1246. What: /sys/bus/iio/devices/iio:deviceX/in_currentX_raw
  1247. What: /sys/bus/iio/devices/iio:deviceX/in_currentX_i_raw
  1248. What: /sys/bus/iio/devices/iio:deviceX/in_currentX_q_raw
  1249. KernelVersion: 3.18
  1250. Contact: linux-iio@vger.kernel.org
  1251. Description:
  1252. Raw current measurement from channel X. Units are in milliamps
  1253. after application of scale and offset. If no offset or scale is
  1254. present, output should be considered as processed with the
  1255. unit in milliamps.
  1256. Channels with 'i' and 'q' modifiers always exist in pairs and both
  1257. channels refer to the same signal. The 'i' channel contains the in-phase
  1258. component of the signal while the 'q' channel contains the quadrature
  1259. component.
  1260. What: /sys/.../iio:deviceX/in_energy_en
  1261. What: /sys/.../iio:deviceX/in_distance_en
  1262. What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
  1263. What: /sys/.../iio:deviceX/in_steps_en
  1264. KernelVersion: 3.19
  1265. Contact: linux-iio@vger.kernel.org
  1266. Description:
  1267. Activates a device feature that runs in firmware/hardware.
  1268. E.g. for steps: the pedometer saves power while not used;
  1269. when activated, it will count the steps taken by the user in
  1270. firmware and export them through in_steps_input.
  1271. What: /sys/.../iio:deviceX/in_steps_input
  1272. KernelVersion: 3.19
  1273. Contact: linux-iio@vger.kernel.org
  1274. Description:
  1275. This attribute is used to read the number of steps taken by the user
  1276. since the last reboot while activated.
  1277. What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input
  1278. What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw
  1279. KernelVersion: 3.19
  1280. Contact: linux-iio@vger.kernel.org
  1281. Description:
  1282. This attribute is used to read the current speed value of the
  1283. user (which is the norm or magnitude of the velocity vector).
  1284. Units after application of scale are m/s.
  1285. What: /sys/.../iio:deviceX/in_steps_debounce_count
  1286. KernelVersion: 4.0
  1287. Contact: linux-iio@vger.kernel.org
  1288. Description:
  1289. Specifies the number of steps that must occur within
  1290. in_steps_filter_debounce_time for the pedometer to decide the
  1291. consumer is making steps.
  1292. What: /sys/.../iio:deviceX/in_steps_debounce_time
  1293. KernelVersion: 4.0
  1294. Contact: linux-iio@vger.kernel.org
  1295. Description:
  1296. Specifies number of seconds in which we compute the steps
  1297. that occur in order to decide if the consumer is making steps.
  1298. What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark
  1299. KernelVersion: 4.2
  1300. Contact: linux-iio@vger.kernel.org
  1301. Description:
  1302. A single positive integer specifying the maximum number of scan
  1303. elements to wait for.
  1304. Poll will block until the watermark is reached.
  1305. Blocking read will wait until the minimum between the requested
  1306. read amount or the low water mark is available.
  1307. Non-blocking read will retrieve the available samples from the
  1308. buffer even if there are less samples then watermark level. This
  1309. allows the application to block on poll with a timeout and read
  1310. the available samples after the timeout expires and thus have a
  1311. maximum delay guarantee.
  1312. What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_enabled
  1313. KernelVersion: 4.2
  1314. Contact: linux-iio@vger.kernel.org
  1315. Description:
  1316. A read-only boolean value that indicates if the hardware fifo is
  1317. currently enabled or disabled. If the device does not have a
  1318. hardware fifo this entry is not present.
  1319. The hardware fifo is enabled when the buffer is enabled if the
  1320. current hardware fifo watermark level is set and other current
  1321. device settings allows it (e.g. if a trigger is set that samples
  1322. data differently that the hardware fifo does then hardware fifo
  1323. will not enabled).
  1324. If the hardware fifo is enabled and the level of the hardware
  1325. fifo reaches the hardware fifo watermark level the device will
  1326. flush its hardware fifo to the device buffer. Doing a non
  1327. blocking read on the device when no samples are present in the
  1328. device buffer will also force a flush.
  1329. When the hardware fifo is enabled there is no need to use a
  1330. trigger to use buffer mode since the watermark settings
  1331. guarantees that the hardware fifo is flushed to the device
  1332. buffer.
  1333. What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark
  1334. KernelVersion: 4.2
  1335. Contact: linux-iio@vger.kernel.org
  1336. Description:
  1337. Read-only entry that contains a single integer specifying the
  1338. current watermark level for the hardware fifo. If the device
  1339. does not have a hardware fifo this entry is not present.
  1340. The watermark level for the hardware fifo is set by the driver
  1341. based on the value set by the user in buffer/watermark but
  1342. taking into account hardware limitations (e.g. most hardware
  1343. buffers are limited to 32-64 samples, some hardware buffers
  1344. watermarks are fixed or have minimum levels). A value of 0
  1345. means that the hardware watermark is unset.
  1346. What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_min
  1347. KernelVersion: 4.2
  1348. Contact: linux-iio@vger.kernel.org
  1349. Description:
  1350. A single positive integer specifying the minimum watermark level
  1351. for the hardware fifo of this device. If the device does not
  1352. have a hardware fifo this entry is not present.
  1353. If the user sets buffer/watermark to a value less than this one,
  1354. then the hardware watermark will remain unset.
  1355. What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_max
  1356. KernelVersion: 4.2
  1357. Contact: linux-iio@vger.kernel.org
  1358. Description:
  1359. A single positive integer specifying the maximum watermark level
  1360. for the hardware fifo of this device. If the device does not
  1361. have a hardware fifo this entry is not present.
  1362. If the user sets buffer/watermark to a value greater than this
  1363. one, then the hardware watermark will be capped at this value.
  1364. What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark_available
  1365. KernelVersion: 4.2
  1366. Contact: linux-iio@vger.kernel.org
  1367. Description:
  1368. A list of positive integers specifying the available watermark
  1369. levels for the hardware fifo. This entry is optional and if it
  1370. is not present it means that all the values between
  1371. hwfifo_watermark_min and hwfifo_watermark_max are supported.
  1372. If the user sets buffer/watermark to a value greater than
  1373. hwfifo_watermak_min but not equal to any of the values in this
  1374. list, the driver will chose an appropriate value for the
  1375. hardware fifo watermark level.
  1376. What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity
  1377. What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity
  1378. What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity
  1379. What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity
  1380. KernelVersion: 4.1
  1381. Contact: linux-iio@vger.kernel.org
  1382. Description:
  1383. The emissivity ratio of the surface in the field of view of the
  1384. contactless temperature sensor. Emissivity varies from 0 to 1,
  1385. with 1 being the emissivity of a black body.
  1386. What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_oversampling_ratio
  1387. What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_oversampling_ratio
  1388. What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_oversampling_ratio
  1389. KernelVersion: 4.2
  1390. Contact: linux-iio@vger.kernel.org
  1391. Description:
  1392. Hardware applied number of measurements for acquiring one
  1393. data point. The HW will do <type>[_name]_oversampling_ratio
  1394. measurements and return the average value as output data. Each
  1395. value resulted from <type>[_name]_oversampling_ratio measurements
  1396. is considered as one sample for <type>[_name]_sampling_frequency.
  1397. What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw
  1398. What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw
  1399. What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw
  1400. What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw
  1401. What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw
  1402. What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw
  1403. KernelVersion: 4.3
  1404. Contact: linux-iio@vger.kernel.org
  1405. Description:
  1406. Raw (unscaled no offset etc.) percentage reading of a substance.
  1407. What: /sys/bus/iio/devices/iio:deviceX/in_resistance_raw
  1408. What: /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw
  1409. What: /sys/bus/iio/devices/iio:deviceX/out_resistance_raw
  1410. What: /sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
  1411. KernelVersion: 4.3
  1412. Contact: linux-iio@vger.kernel.org
  1413. Description:
  1414. Raw (unscaled no offset etc.) resistance reading that can be processed
  1415. into an ohm value.
  1416. What: /sys/bus/iio/devices/iio:deviceX/heater_enable
  1417. KernelVersion: 4.1.0
  1418. Contact: linux-iio@vger.kernel.org
  1419. Description:
  1420. '1' (enable) or '0' (disable) specifying the enable
  1421. of heater function. Same reading values apply
  1422. This ABI is especially applicable for humidity sensors
  1423. to heatup the device and get rid of any condensation
  1424. in some humidity environment
  1425. What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
  1426. KernelVersion: 4.5
  1427. Contact: linux-iio@vger.kernel.org
  1428. Description:
  1429. Raw (unscaled no offset etc.) pH reading of a substance as a negative
  1430. base-10 logarithm of hydrodium ions in a litre of water.
  1431. What: /sys/bus/iio/devices/iio:deviceX/mount_matrix
  1432. What: /sys/bus/iio/devices/iio:deviceX/in_mount_matrix
  1433. What: /sys/bus/iio/devices/iio:deviceX/out_mount_matrix
  1434. What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_mount_matrix
  1435. What: /sys/bus/iio/devices/iio:deviceX/in_accel_mount_matrix
  1436. KernelVersion: 4.6
  1437. Contact: linux-iio@vger.kernel.org
  1438. Description:
  1439. Mounting matrix for IIO sensors. This is a rotation matrix which
  1440. informs userspace about sensor chip's placement relative to the
  1441. main hardware it is mounted on.
  1442. Main hardware placement is defined according to the local
  1443. reference frame related to the physical quantity the sensor
  1444. measures.
  1445. Given that the rotation matrix is defined in a board specific
  1446. way (platform data and / or device-tree), the main hardware
  1447. reference frame definition is left to the implementor's choice
  1448. (see below for a magnetometer example).
  1449. Applications should apply this rotation matrix to samples so
  1450. that when main hardware reference frame is aligned onto local
  1451. reference frame, then sensor chip reference frame is also
  1452. perfectly aligned with it.
  1453. Matrix is a 3x3 unitary matrix and typically looks like
  1454. [0, 1, 0; 1, 0, 0; 0, 0, -1]. Identity matrix
  1455. [1, 0, 0; 0, 1, 0; 0, 0, 1] means sensor chip and main hardware
  1456. are perfectly aligned with each other.
  1457. For example, a mounting matrix for a magnetometer sensor informs
  1458. userspace about sensor chip's ORIENTATION relative to the main
  1459. hardware.
  1460. More specifically, main hardware orientation is defined with
  1461. respect to the LOCAL EARTH GEOMAGNETIC REFERENCE FRAME where :
  1462. * Y is in the ground plane and positive towards magnetic North ;
  1463. * X is in the ground plane, perpendicular to the North axis and
  1464. positive towards the East ;
  1465. * Z is perpendicular to the ground plane and positive upwards.
  1466. An implementor might consider that for a hand-held device, a
  1467. 'natural' orientation would be 'front facing camera at the top'.
  1468. The main hardware reference frame could then be described as :
  1469. * Y is in the plane of the screen and is positive towards the
  1470. top of the screen ;
  1471. * X is in the plane of the screen, perpendicular to Y axis, and
  1472. positive towards the right hand side of the screen ;
  1473. * Z is perpendicular to the screen plane and positive out of the
  1474. screen.
  1475. Another example for a quadrotor UAV might be :
  1476. * Y is in the plane of the propellers and positive towards the
  1477. front-view camera;
  1478. * X is in the plane of the propellers, perpendicular to Y axis,
  1479. and positive towards the starboard side of the UAV ;
  1480. * Z is perpendicular to propellers plane and positive upwards.
  1481. What: /sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
  1482. KernelVersion: 4.8
  1483. Contact: linux-iio@vger.kernel.org
  1484. Description:
  1485. Raw (unscaled no offset etc.) electric conductivity reading that
  1486. can be processed to siemens per meter.
  1487. What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw
  1488. KernelVersion: 4.10
  1489. Contact: linux-iio@vger.kernel.org
  1490. Description:
  1491. Raw counter device counts from channel Y. For quadrature
  1492. counters, multiplication by an available [Y]_scale results in
  1493. the counts of a single quadrature signal phase from channel Y.
  1494. What: /sys/bus/iio/devices/iio:deviceX/in_indexY_raw
  1495. KernelVersion: 4.10
  1496. Contact: linux-iio@vger.kernel.org
  1497. Description:
  1498. Raw counter device index value from channel Y. This attribute
  1499. provides an absolute positional reference (e.g. a pulse once per
  1500. revolution) which may be used to home positional systems as
  1501. required.
  1502. What: /sys/bus/iio/devices/iio:deviceX/in_count_count_direction_available
  1503. KernelVersion: 4.12
  1504. Contact: linux-iio@vger.kernel.org
  1505. Description:
  1506. A list of possible counting directions which are:
  1507. - "up" : counter device is increasing.
  1508. - "down": counter device is decreasing.
  1509. What: /sys/bus/iio/devices/iio:deviceX/in_countY_count_direction
  1510. KernelVersion: 4.12
  1511. Contact: linux-iio@vger.kernel.org
  1512. Description:
  1513. Raw counter device counters direction for channel Y.