1 .. SPDX-License-Identifier: GPL-2.0-only
2
3 =============
4 AD4000 driver
5 =============
6
7 Device driver for Analog Devices Inc. AD4000 s
8
9 Supported devices
10 =================
11
12 * `AD4000 <https://www.analog.com/AD4000>`_
13 * `AD4001 <https://www.analog.com/AD4001>`_
14 * `AD4002 <https://www.analog.com/AD4002>`_
15 * `AD4003 <https://www.analog.com/AD4003>`_
16 * `AD4004 <https://www.analog.com/AD4004>`_
17 * `AD4005 <https://www.analog.com/AD4005>`_
18 * `AD4006 <https://www.analog.com/AD4006>`_
19 * `AD4007 <https://www.analog.com/AD4007>`_
20 * `AD4008 <https://www.analog.com/AD4008>`_
21 * `AD4010 <https://www.analog.com/AD4010>`_
22 * `AD4011 <https://www.analog.com/AD4011>`_
23 * `AD4020 <https://www.analog.com/AD4020>`_
24 * `AD4021 <https://www.analog.com/AD4021>`_
25 * `AD4022 <https://www.analog.com/AD4022>`_
26 * `ADAQ4001 <https://www.analog.com/ADAQ4001>`
27 * `ADAQ4003 <https://www.analog.com/ADAQ4003>`
28
29 Wiring connections
30 ------------------
31
32 Devices of the AD4000 series can be connected
33 few different modes.
34
35 CS mode, 3-wire turbo mode
36 ^^^^^^^^^^^^^^^^^^^^^^^^^^
37
38 Datasheet "3-wire" mode is what most resembles
39 for these devices, comprises of connecting the
40 pin and other SPI lines as usual. This configu
41 "CS Mode, 3-Wire Turbo Mode" connection in dat
42 NOTE: The datasheet definition of 3-wire mode
43 same of standard spi-3wire mode.
44 This is the only connection mode that allows c
45 it requires the SPI controller to support the
46
47 Omit the ``adi,sdi-pin`` property in device tr
48
49 ::
50
51 +----
52 + ----------------------------------| SDO
53 | |
54 | +-------------------| CS
55 | v |
56 | +--------------------+ |
57 | | CNV | |
58 +--->| SDI AD4000 SDO |-------->| SDI
59 | SCK | |
60 +--------------------+ |
61 ^ |
62 +--------------------| SCL
63 +----
64
65 CS mode, 3-wire, without busy indicator
66 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
67
68 Another wiring configuration supported as "3-w
69 hard-wired to digital input/output interface s
70 controller is not required to support ``SPI_MO
71 is not possible. This connection mode saves on
72 controller.
73
74 Set the ``adi,sdi-pin`` device tree property t
75
76 ::
77
78 +----
79 +--------------------| CS
80 v |
81 VIO +--------------------+ |
82 | | CNV | |
83 +--->| SDI AD4000 SDO |-------->| SDI
84 | SCK | |
85 +--------------------+ |
86 ^ |
87 +--------------------| SCL
88 +----
89
90 Alternatively, a GPIO may be connected to the
91 the previous wiring configuration but saves th
92
93 ::
94
95 +----
96 +--------------------| GPI
97 v |
98 VIO +--------------------+ |
99 | | CNV | |
100 +--->| SDI AD4000 SDO |-------->| SDI
101 | SCK | |
102 +--------------------+ |
103 ^ |
104 +--------------------| SCL
105 +----
106
107 CS mode, 4-wire without busy indicator
108 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
109
110 In datasheet "4-wire" mode, the controller CS
111 pin and a GPIO is connected to the ADC CNV pin
112 suit scenarios where multiple ADCs can share o
113
114 Set ``adi,sdi-pin`` to ``"cs"`` to select this
115
116
117 ::
118
119 +----
120 + ----------------------------------| CS
121 | |
122 | +-------------------| GPI
123 | v |
124 | +--------------------+ |
125 | | CNV | |
126 +--->| SDI AD4000 SDO |-------->| SDI
127 | SCK | |
128 +--------------------+ |
129 ^ |
130 +--------------------| SCL
131 +----
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.