xref: /linux/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml (revision b1a1eaf6183697b77f7243780a25f35c7c0c8bdf) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Analog Devices AD7091R-2/-4/-5/-8 Multi-Channel 12-Bit ADCs
8
9maintainers:
10  - Michael Hennerich <michael.hennerich@analog.com>
11  - Marcelo Schmitt <marcelo.schmitt@analog.com>
12
13description: |
14  Analog Devices AD7091R5 4-Channel 12-Bit ADC supporting I2C interface
15  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
16  Analog Devices AD7091R-2/AD7091R-4/AD7091R-8 2-/4-/8-Channel 12-Bit ADCs
17  supporting SPI interface
18  https://www.analog.com/media/en/technical-documentation/data-sheets/AD7091R-2_7091R-4_7091R-8.pdf
19
20properties:
21  compatible:
22    enum:
23      - adi,ad7091r2
24      - adi,ad7091r4
25      - adi,ad7091r5
26      - adi,ad7091r8
27
28  reg:
29    maxItems: 1
30
31  vdd-supply:
32    description:
33      Provide VDD power to the sensor (VDD range is from 2.7V to 5.25V).
34
35  vdrive-supply:
36    description:
37      Determines the voltage level at which the interface logic will operate.
38      The V_drive voltage range is from 1.8V to 5.25V and must not exceed VDD by
39      more than 0.3V.
40
41  vref-supply:
42    description:
43      Phandle to the vref power supply
44
45  convst-gpios:
46    description:
47      GPIO connected to the CONVST pin.
48      This logic input is used to initiate conversions on the analog
49      input channels.
50    maxItems: 1
51
52  reset-gpios:
53    maxItems: 1
54
55  interrupts:
56    description:
57      Interrupt for signaling when conversion results exceed the high limit for
58      ADC readings or fall below the low limit for them. Interrupt source must
59      be attached to ALERT/BUSY/GPO0 pin.
60    maxItems: 1
61
62required:
63  - compatible
64  - reg
65
66allOf:
67  - $ref: /schemas/spi/spi-peripheral-props.yaml#
68
69  # AD7091R-2 does not have ALERT/BUSY/GPO pin
70  - if:
71      properties:
72        compatible:
73          contains:
74            enum:
75              - adi,ad7091r2
76    then:
77      properties:
78        interrupts: false
79
80  - if:
81      properties:
82        compatible:
83          contains:
84            enum:
85              - adi,ad7091r2
86              - adi,ad7091r4
87              - adi,ad7091r8
88    then:
89      required:
90        - convst-gpios
91
92unevaluatedProperties: false
93
94examples:
95  - |
96    #include <dt-bindings/gpio/gpio.h>
97    #include <dt-bindings/interrupt-controller/irq.h>
98    i2c {
99        #address-cells = <1>;
100        #size-cells = <0>;
101
102        adc@2f {
103            compatible = "adi,ad7091r5";
104            reg = <0x2f>;
105
106            interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
107            interrupt-parent = <&gpio>;
108        };
109    };
110  - |
111    #include <dt-bindings/gpio/gpio.h>
112    #include <dt-bindings/interrupt-controller/irq.h>
113    spi {
114        #address-cells = <1>;
115        #size-cells = <0>;
116
117        adc@0 {
118            compatible = "adi,ad7091r8";
119            reg = <0x0>;
120            spi-max-frequency = <1000000>;
121            vref-supply = <&adc_vref>;
122            convst-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
123            reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
124            interrupts = <22 IRQ_TYPE_EDGE_FALLING>;
125            interrupt-parent = <&gpio>;
126        };
127    };
128...
129