Lines Matching +full:scan +full:- +full:delay

1 .. SPDX-License-Identifier: GPL-2.0
14 Devices with buffer support feature an additional sub-directory in the
25 ----------
31 ----------
34 be written last, after length and selection of scan elements. Writing a non-zero
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41 Read / Write positive integer attribute specifying the maximum number of scan
49 Non-blocking read will retrieve the available samples from the buffer even if
52 expires and thus have a maximum delay guarantee.
55 --------------
57 Read-only attribute indicating the bytes of data available in the buffer. In the
62 Scan elements
63 -------------
66 a scan element. The scan elements attributes are presented below.
71 is non-zero, then a triggered capture will contain data samples for this
76 Read-only unsigned integer attribute specifying the position of the channel in
84 Read-only attribute containing the description of the scan element data storage
88 - **be** or **le** specifies big or little-endian.
89 - **s** or **u** specifies if signed (2's complement) or unsigned.
90 - **bits** is the number of valid data bits.
91 - **storagebits** is the number of bits (after padding) that it occupies in the
93 - **repeat** specifies the number of bits/storagebits repetitions. When the
95 - **shift** if specified, is the shift that needs to be applied prior to
98 For example, a driver for a 3-axis accelerometer with 12-bit resolution where
99 data is stored in two 8-bit registers is as follows::
102         +---+---+---+---+---+---+---+---+
104         +---+---+---+---+---+---+---+---+
107         +---+---+---+---+---+---+---+---+
109         +---+---+---+---+---+---+---+---+
111 will have the following scan element type for each axis:
113 .. code-block:: bash
119 two-byte little-endian signed data, that needs a 4 bits right shift before
126 - channel0: index: 0, type: be:u16/16>>0
127 - channel1: index: 1, type: be:u32/32>>0
128 - channel2: index: 2, type: be:u32/32>>0
129 - channel3: index: 3, type: be:u64/64>>0
133           0-1   2   3   4-7  8-11  12  13  14  15  16-23   -> buffer byte number
134         +-----+---+---+-----+-----+---+---+---+---+-----+
135         |CHN_0|PAD|PAD|CHN_1|CHN_2|PAD|PAD|PAD|PAD|CHN_3|  -> buffer content
136         +-----+---+---+-----+-----+---+---+---+---+-----+
141           0-1   2   3   4   5   6   7  8-15    -> buffer byte number
142         +-----+---+---+---+---+---+---+-----+
143         |CHN_0|PAD|PAD|PAD|PAD|PAD|PAD|CHN_3|  -> buffer content
144         +-----+---+---+---+---+---+---+-----+
151 Please see ``Documentation/ABI/testing/sysfs-bus-iio`` for a complete