iio/adc/adi%2Cad7944.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10   - Michael Hennerich <Michael.Hennerich@analog.com>
11   - Nuno Sá <nuno.sa@analog.com>
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
33   spi-max-frequency:
36   spi-cpol: true
37   spi-cpha: true
39   adi,spi-mode:
41     enum: [ single, chain ]
46       the datasheet calls "4-wire mode". This is the conventional SPI mode used
54       * single: The datasheet calls this "3-wire mode". (NOTE: The datasheet's
55         definition of 3-wire mode is NOT at all related to the standard
56         spi-3wire property!) This mode is often used when the ADC is the only
68   '#daisy-chained-devices': true
70   avdd-supply:
73   dvdd-supply:
76   vio-supply:
80   bvdd-supply:
84       connected to the same supply as ref-supply. Otherwise, when using an
88   ref-supply:
93   refin-supply:
100   cnv-gpios:
104       'single' mode, this property is omitted if the CNV pin is connected to the
108   turbo-gpios:
111       line is hard-wired and the state is determined by the adi,always-turbo
115   adi,always-turbo:
118       When present, this property indicates that the TURBO line is hard-wired
119       and the state is always high. If neither this property nor turbo-gpios is
120       present, the TURBO line is assumed to be hard-wired and the state is
127       while the SDI line is high and the CNV line is low ('single' mode) or the
133   - compatible
134   - reg
135   - avdd-supply
136   - dvdd-supply
137   - vio-supply
138   - bvdd-supply
141   # ref-supply and refin-supply are mutually exclusive (neither is also valid)
142   - if:
144         - ref-supply
147         refin-supply: false
148   - if:
150         - refin-supply
153         ref-supply: false
154   # in '4-wire' mode, cnv-gpios is required, for other modes it is optional
155   - if:
158           - adi,spi-mode
161         - cnv-gpios
163   - if:
165         - adi,spi-mode
167         adi,spi-mode:
171         spi-max-frequency:
173         adi,always-turbo: false
175         - '#daisy-chained-devices'
178         '#daisy-chained-devices': false
179   # turbo-gpios and adi,always-turbo are mutually exclusive
180   - if:
182         - turbo-gpios
185         adi,always-turbo: false
186   - if:
188         - adi,always-turbo
191         turbo-gpios: false
196   - |
197     #include <dt-bindings/gpio/gpio.h>
199         #address-cells = <1>;
200         #size-cells = <0>;
204             spi-cpha;
205             spi-max-frequency = <111111111>;
206             avdd-supply = <&supply_2_5V>;
207             dvdd-supply = <&supply_2_5V>;
208             vio-supply = <&supply_1_8V>;
209             bvdd-supply = <&supply_5V>;
210             cnv-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
211             turbo-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;