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/linux-6.14.4/Documentation/devicetree/bindings/iio/adc/
Dadi,ad7944.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Michael Hennerich <[email protected]>
11 - Nuno Sá <[email protected]>
14 A family of pin-compatible single channel differential analog to digital
21 $ref: /schemas/spi/spi-peripheral-props.yaml#
26 - adi,ad7944
27 - adi,ad7985
28 - adi,ad7986
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Dadi,ad7625.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Michael Hennerich <[email protected]>
11 - Nuno Sá <[email protected]>
24 - adi,ad7625
25 - adi,ad7626
26 - adi,ad7960
27 - adi,ad7961
29 vdd1-supply: true
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Dadi,ad4000.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marcelo Schmitt <[email protected]>
15 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf
16 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf
17 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf
18 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf
19 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf
20 https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf
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Dadi,ad4695.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Michael Hennerich <[email protected]>
11 - Nuno Sá <[email protected]>
14 A family of similar multi-channel analog to digital converters with SPI bus.
21 $ref: /schemas/spi/spi-peripheral-props.yaml#
26 - adi,ad4695
27 - adi,ad4696
28 - adi,ad4697
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/linux-6.14.4/Documentation/iio/
Dad7944.rst1 .. SPDX-License-Identifier: GPL-2.0-only
25 ----------------
29 CS mode, 3-wire, without busy indicator
32 .. code-block::
34 +-------------+
35 +--------------------| CS |
37 VIO +--------------------+ | HOST |
38 | | CNV | | |
39 +--->| SDI AD7944 SDO |-------->| SDI |
41 +--------------------+ | |
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Dad4695.rst1 .. SPDX-License-Identifier: GPL-2.0-only
26 ----------------
30 4-wire mode
33 In this mode, CNV and CS are tied together and there is a single SDO line.
35 .. code-block::
37 +-------------+ +-------------+
38 | CS |<-+------| CS |
39 | CNV |<-+ | |
42 | SDI |<--------| SDO |
43 | SDO |-------->| SDI |
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/linux-6.14.4/drivers/iio/adc/
Dad7944.c1 // SPDX-License-Identifier: GPL-2.0-only
37 /* datasheet calls this "4-wire mode" */
39 /* datasheet calls this "3-wire mode" (not related to SPI_3WIRE!) */
45 /* maps adi,spi-mode property value to enum */
58 /* Chip-specific timing specifications. */
60 /* GPIO connected to CNV pin. */
61 struct gpio_desc *cnv; member
64 /* Indicates TURBO is hard-wired to be always enabled. */
82 /* quite time before CNV rising edge */
102 * AD7944_DEFINE_CHIP_INFO - Define a chip info structure for a specific chip
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Dad7625.c1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
47 /* AD7625_CHAN_SPEC - Define a chan spec structure for a specific chip */
75 * Waveforms containing the last-requested and rounded
76 * properties for the clk_gate and cnv PWMs
83 * Optional GPIOs for controlling device state. EN0 and EN1
85 * EN2 controls the device -3dB bandwidth (and by extension, max
187 * the duty_cycle for ref_clk, cnv, and clk_gate in ad7625_set_sampling_freq()
189 cnv_wf.duty_length_ns = st->info->timing_spec->conv_high_ns; in ad7625_set_sampling_freq()
191 ret = pwm_round_waveform_might_sleep(st->cnv_pwm, &cnv_wf); in ad7625_set_sampling_freq()
197 * offset should mirror the CNV signal in ad7625_set_sampling_freq()
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