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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/microchip,mcp3564.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microchip MCP346X and MCP356X ADC Family
maintainers:
- Marius Cristea <marius.cristea@microchip.com>
description: |
Bindings for the Microchip family of 153.6 ksps, Low-Noise 16/24-Bit
Delta-Sigma ADCs with an SPI interface. Datasheet can be found here:
Datasheet for MCP3561, MCP3562, MCP3564 can be found here:
https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP3561-2-4-Family-Data-Sheet-DS20006181C.pdf
Datasheet for MCP3561R, MCP3562R, MCP3564R can be found here:
https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP3561_2_4R-Data-Sheet-DS200006391C.pdf
Datasheet for MCP3461, MCP3462, MCP3464 can be found here:
https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP3461-2-4-Two-Four-Eight-Channel-153.6-ksps-Low-Noise-16-Bit-Delta-Sigma-ADC-Data-Sheet-20006180D.pdf
Datasheet for MCP3461R, MCP3462R, MCP3464R can be found here:
https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP3461-2-4R-Family-Data-Sheet-DS20006404C.pdf
properties:
compatible:
enum:
- microchip,mcp3461
- microchip,mcp3462
- microchip,mcp3464
- microchip,mcp3461r
- microchip,mcp3462r
- microchip,mcp3464r
- microchip,mcp3561
- microchip,mcp3562
- microchip,mcp3564
- microchip,mcp3561r
- microchip,mcp3562r
- microchip,mcp3564r
reg:
maxItems: 1
spi-max-frequency:
maximum: 20000000
spi-cpha: true
spi-cpol: true
vdd-supply: true
avdd-supply: true
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
drive-open-drain:
description:
Whether to drive the IRQ signal as push-pull (default) or open-drain. Note
that the device requires this pin to become "high", otherwise it will stop
converting.
type: boolean
vref-supply:
description:
Some devices have a specific reference voltage supplied on a different
pin to the other supplies. Needed to be able to establish channel scaling
unless there is also an internal reference available (e.g. mcp3564r). In
case of "r" devices (e. g. mcp3564r), if it does not exists the internal
reference will be used.
microchip,hw-device-address:
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 3
description:
The address is set on a per-device basis by fuses in the factory,
configured on request. If not requested, the fuses are set for 0x1.
The device address is part of the device markings to avoid
potential confusion. This address is coded on two bits, so four possible
addresses are available when multiple devices are present on the same
SPI bus with only one Chip Select line for all devices.
Each device communication starts by a CS falling edge, followed by the
clocking of the device address (BITS[7:6] - top two bits of COMMAND BYTE
which is first one on the wire).
"#io-channel-cells":
const: 1
"#address-cells":
const: 1
"#size-cells":
const: 0
patternProperties:
"^channel@([0-9]|([1-7][0-9]))$":
$ref: adc.yaml
type: object
unevaluatedProperties: false
description: Represents the external channels which are connected to the ADC.
properties:
reg:
description: The channel number in single-ended and differential mode.
minimum: 0
maximum: 79
required:
- reg
dependencies:
spi-cpol: [ spi-cpha ]
spi-cpha: [ spi-cpol ]
required:
- compatible
- reg
- microchip,hw-device-address
- spi-max-frequency
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
- # External vref, no internal reference
if:
properties:
compatible:
contains:
enum:
- microchip,mcp3461
- microchip,mcp3462
- microchip,mcp3464
- microchip,mcp3561
- microchip,mcp3562
- microchip,mcp3564
then:
required:
- vref-supply
unevaluatedProperties: false
examples:
- |
spi {
#address-cells = <1>;
#size-cells = <0>;
adc@0 {
compatible = "microchip,mcp3564r";
reg = <0>;
vref-supply = <&vref_reg>;
spi-cpha;
spi-cpol;
spi-max-frequency = <10000000>;
microchip,hw-device-address = <1>;
#address-cells = <1>;
#size-cells = <0>;
channel@0 {
/* CH0 to AGND */
reg = <0>;
label = "CH0";
};
channel@1 {
/* CH1 to AGND */
reg = <1>;
label = "CH1";
};
/* diff-channels */
channel@11 {
reg = <11>;
/* CN0, CN1 */
diff-channels = <0 1>;
label = "CH0_CH1";
};
channel@22 {
reg = <0x22>;
/* CN1, CN2 */
diff-channels = <1 2>;
label = "CH1_CH3";
};
channel@23 {
reg = <0x23>;
/* CN1, CN3 */
diff-channels = <1 3>;
label = "CH1_CH3";
};
};
};
...
|
