1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
# Copyright 2019 Marcus Folkesson <marcus.folkesson@gmail.com>
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/microchip,mcp3911.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microchip MCP3911 Dual channel analog front end (ADC)
maintainers:
- Marcus Folkesson <marcus.folkesson@gmail.com>
- Kent Gustavsson <nedo80@gmail.com>
description: |
Bindings for the Microchip MCP3911 Dual channel ADC device. Datasheet can be
found here: https://ww1.microchip.com/downloads/en/DeviceDoc/20002286C.pdf
properties:
compatible:
enum:
- microchip,mcp3910
- microchip,mcp3911
- microchip,mcp3912
- microchip,mcp3913
- microchip,mcp3914
- microchip,mcp3918
- microchip,mcp3919
reg:
maxItems: 1
spi-max-frequency:
maximum: 20000000
clocks:
description: |
Phandle and clock identifier for external sampling clock.
If not specified, the internal crystal oscillator will be used.
maxItems: 1
interrupts:
description: IRQ line of the ADC
maxItems: 1
microchip,data-ready-hiz:
description:
Data Ready Pin Inactive State Control
true = The DR pin state is high-impedance
false = The DR pin state is logic high
type: boolean
microchip,device-addr:
description: Device address when multiple MCP3911 chips are present on the same SPI bus.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
default: 0
vref-supply:
description: |
Phandle to the external reference voltage supply.
If not specified, the internal voltage reference (1.2V) will be used.
required:
- compatible
- reg
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
unevaluatedProperties: false
examples:
- |
spi {
#address-cells = <1>;
#size-cells = <0>;
adc@0 {
compatible = "microchip,mcp3911";
reg = <0>;
interrupt-parent = <&gpio5>;
interrupts = <15 2>;
spi-max-frequency = <20000000>;
microchip,device-addr = <0>;
vref-supply = <&vref_reg>;
clocks = <&xtal>;
};
};
|
