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Linux/Documentation/ABI/obsolete/sysfs-bus-iio

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  1 What:           /sys/bus/iio/devices/iio:deviceX/buffer/length
  2 KernelVersion:  2.6.35
  3 Contact:        linux-iio@vger.kernel.org
  4 Description:
  5                 Number of scans contained by the buffer.
  6 
  7                 Since Kernel 5.11, multiple buffers are supported.
  8                 so, it is better to use, instead:
  9 
 10                         /sys/bus/iio/devices/iio:deviceX/bufferY/length
 11 
 12 What:           /sys/bus/iio/devices/iio:deviceX/buffer/enable
 13 KernelVersion:  2.6.35
 14 Contact:        linux-iio@vger.kernel.org
 15 Description:
 16                 Actually start the buffer capture up.  Will start trigger
 17                 if first device and appropriate.
 18 
 19                 Since Kernel 5.11, multiple buffers are supported.
 20                 so, it is better to use, instead:
 21 
 22                         /sys/bus/iio/devices/iio:deviceX/bufferY/enable
 23 
 24 What:           /sys/bus/iio/devices/iio:deviceX/scan_elements
 25 KernelVersion:  2.6.37
 26 Contact:        linux-iio@vger.kernel.org
 27 Description:
 28                 Directory containing interfaces for elements that will be
 29                 captured for a single triggered sample set in the buffer.
 30 
 31                 Since kernel 5.11 the scan_elements attributes are merged into
 32                 the bufferY directory, to be configurable per buffer.
 33 
 34 What:           /sys/.../iio:deviceX/scan_elements/in_accel_x_en
 35 What:           /sys/.../iio:deviceX/scan_elements/in_accel_y_en
 36 What:           /sys/.../iio:deviceX/scan_elements/in_accel_z_en
 37 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_x_en
 38 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_y_en
 39 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
 40 What:           /sys/.../iio:deviceX/scan_elements/in_magn_x_en
 41 What:           /sys/.../iio:deviceX/scan_elements/in_magn_y_en
 42 What:           /sys/.../iio:deviceX/scan_elements/in_magn_z_en
 43 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_en
 44 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_en
 45 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_en
 46 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_en
 47 What:           /sys/.../iio:deviceX/scan_elements/in_timestamp_en
 48 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
 49 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_en
 50 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY-voltageZ_en
 51 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_i_en
 52 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_q_en
 53 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_i_en
 54 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_q_en
 55 What:           /sys/.../iio:deviceX/scan_elements/in_incli_x_en
 56 What:           /sys/.../iio:deviceX/scan_elements/in_incli_y_en
 57 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_en
 58 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_en
 59 What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
 60 What:           /sys/.../iio:deviceX/scan_elements/in_proximity_en
 61 KernelVersion:  2.6.37
 62 Contact:        linux-iio@vger.kernel.org
 63 Description:
 64                 Scan element control for triggered data capture.
 65 
 66                 Since kernel 5.11 the scan_elements attributes are merged into
 67                 the bufferY directory, to be configurable per buffer.
 68 
 69 What:           /sys/.../iio:deviceX/scan_elements/in_accel_type
 70 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_type
 71 What:           /sys/.../iio:deviceX/scan_elements/in_magn_type
 72 What:           /sys/.../iio:deviceX/scan_elements/in_incli_type
 73 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_type
 74 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_type
 75 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
 76 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_i_type
 77 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_q_type
 78 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_i_type
 79 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_q_type
 80 What:           /sys/.../iio:deviceX/scan_elements/in_timestamp_type
 81 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_type
 82 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_type
 83 What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
 84 What:           /sys/.../iio:deviceX/scan_elements/in_proximity_type
 85 KernelVersion:  2.6.37
 86 Contact:        linux-iio@vger.kernel.org
 87 Description:
 88                 Description of the scan element data storage within the buffer
 89                 and hence the form in which it is read from user-space.
 90                 Form is [be|le]:[s|u]bits/storagebits[>>shift].
 91                 be or le specifies big or little endian. s or u specifies if
 92                 signed (2's complement) or unsigned. bits is the number of bits
 93                 of data and storagebits is the space (after padding) that it
 94                 occupies in the buffer. shift if specified, is the shift that
 95                 needs to be applied prior to masking out unused bits. Some
 96                 devices put their data in the middle of the transferred elements
 97                 with additional information on both sides.  Note that some
 98                 devices will have additional information in the unused bits
 99                 so to get a clean value, the bits value must be used to mask
100                 the buffer output value appropriately.  The storagebits value
101                 also specifies the data alignment.  So s48/64>>2 will be a
102                 signed 48 bit integer stored in a 64 bit location aligned to
103                 a 64 bit boundary. To obtain the clean value, shift right 2
104                 and apply a mask to zero the top 16 bits of the result.
105                 For other storage combinations this attribute will be extended
106                 appropriately.
107 
108                 Since kernel 5.11 the scan_elements attributes are merged into
109                 the bufferY directory, to be configurable per buffer.
110 
111 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_index
112 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_index
113 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_i_index
114 What:           /sys/.../iio:deviceX/scan_elements/in_voltageY_q_index
115 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_i_index
116 What:           /sys/.../iio:deviceX/scan_elements/in_voltage_q_index
117 What:           /sys/.../iio:deviceX/scan_elements/in_accel_x_index
118 What:           /sys/.../iio:deviceX/scan_elements/in_accel_y_index
119 What:           /sys/.../iio:deviceX/scan_elements/in_accel_z_index
120 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_x_index
121 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_y_index
122 What:           /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
123 What:           /sys/.../iio:deviceX/scan_elements/in_magn_x_index
124 What:           /sys/.../iio:deviceX/scan_elements/in_magn_y_index
125 What:           /sys/.../iio:deviceX/scan_elements/in_magn_z_index
126 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_index
127 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_index
128 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_magnetic_tilt_comp_index
129 What:           /sys/.../iio:deviceX/scan_elements/in_rot_from_north_true_tilt_comp_index
130 What:           /sys/.../iio:deviceX/scan_elements/in_incli_x_index
131 What:           /sys/.../iio:deviceX/scan_elements/in_incli_y_index
132 What:           /sys/.../iio:deviceX/scan_elements/in_timestamp_index
133 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_index
134 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_index
135 What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
136 What:           /sys/.../iio:deviceX/scan_elements/in_proximity_index
137 KernelVersion:  2.6.37
138 Description:
139                 A single positive integer specifying the position of this
140                 scan element in the buffer. Note these are not dependent on
141                 what is enabled and may not be contiguous. Thus for user-space
142                 to establish the full layout these must be used in conjunction
143                 with all _en attributes to establish which channels are present,
144                 and the relevant _type attributes to establish the data storage
145                 format.
146 
147                 Since kernel 5.11 the scan_elements attributes are merged into
148                 the bufferY directory, to be configurable per buffer.
149 
150 What:           /sys/bus/iio/devices/iio:deviceX/buffer/watermark
151 KernelVersion:  4.2
152 Contact:        linux-iio@vger.kernel.org
153 Description:
154                 A single positive integer specifying the maximum number of scan
155                 elements to wait for.
156 
157                 Poll will block until the watermark is reached.
158 
159                 Blocking read will wait until the minimum between the requested
160                 read amount or the low water mark is available.
161 
162                 Non-blocking read will retrieve the available samples from the
163                 buffer even if there are less samples then watermark level. This
164                 allows the application to block on poll with a timeout and read
165                 the available samples after the timeout expires and thus have a
166                 maximum delay guarantee.
167 
168                 Since Kernel 5.11, multiple buffers are supported.
169                 so, it is better to use, instead:
170 
171                         /sys/bus/iio/devices/iio:deviceX/bufferY/watermark
172 
173 What:           /sys/bus/iio/devices/iio:deviceX/buffer/data_available
174 KernelVersion: 4.16
175 Contact:        linux-iio@vger.kernel.org
176 Description:
177                 A read-only value indicating the bytes of data available in the
178                 buffer. In the case of an output buffer, this indicates the
179                 amount of empty space available to write data to. In the case of
180                 an input buffer, this indicates the amount of data available for
181                 reading.
182 
183                 Since Kernel 5.11, multiple buffers are supported.
184                 so, it is better to use, instead:
185 
186                         /sys/bus/iio/devices/iio:deviceX/bufferY/data_available

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