xref: /linux/Documentation/devicetree/bindings/iio/adc/ti,ads1298.yaml (revision 537c2e91d3549e5d6020bb0576cf9b54a845255f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iio/adc/ti,ads1298.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Texas Instruments' ads1298 medical ADC chips
8
9description: |
10  Datasheet at: https://www.ti.com/product/ADS1298
11  Bindings for this chip aren't complete.
12
13maintainers:
14  - Mike Looijmans <mike.looijmans@topic.nl>
15
16properties:
17  compatible:
18    enum:
19      - ti,ads1298
20
21  reg:
22    maxItems: 1
23
24  spi-cpha: true
25
26  reset-gpios:
27    maxItems: 1
28
29  avdd-supply:
30    description:
31      Analog power supply, voltage between AVDD and AVSS. When providing a
32      symmetric +/- 2.5V, the regulator should report 5V.
33
34  vref-supply:
35    description:
36      Optional reference voltage. If omitted, internal reference is used,
37      which is 2.4V when analog supply is below 4.4V, 4V otherwise.
38
39  clocks:
40    description: Optional 2.048 MHz external source clock on CLK pin
41    maxItems: 1
42
43  interrupts:
44    description: Interrupt on DRDY pin, triggers on falling edge
45    maxItems: 1
46
47  label: true
48
49required:
50  - compatible
51  - reg
52  - avdd-supply
53  - interrupts
54
55allOf:
56  - $ref: /schemas/spi/spi-peripheral-props.yaml#
57
58unevaluatedProperties: false
59
60examples:
61  - |
62    #include <dt-bindings/gpio/gpio.h>
63    #include <dt-bindings/interrupt-controller/irq.h>
64    spi {
65        #address-cells = <1>;
66        #size-cells = <0>;
67
68        adc@1 {
69          reg = <1>;
70          compatible = "ti,ads1298";
71          label = "ads1298-1-ecg";
72          avdd-supply = <&reg_iso_5v_a>;
73          clocks = <&clk_ads1298>;
74          interrupt-parent = <&gpio0>;
75          interrupts = <78 IRQ_TYPE_EDGE_FALLING>;
76          spi-max-frequency = <20000000>;
77          spi-cpha;
78        };
79    };
80...
81