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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/microchip,mcp9982.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microchip MCP998X/33 and MCP998XD/33D Temperature Monitor
maintainers:
- Victor Duicu <victor.duicu@microchip.com>
description: |
The MCP998X/33 and MCP998XD/33D family is a high-accuracy 2-wire
multichannel automotive temperature monitor.
The datasheet can be found here:
https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP998X-Family-Data-Sheet-DS20006827.pdf
properties:
compatible:
enum:
- microchip,mcp9933
- microchip,mcp9933d
- microchip,mcp9982
- microchip,mcp9982d
- microchip,mcp9983
- microchip,mcp9983d
- microchip,mcp9984
- microchip,mcp9984d
- microchip,mcp9985
- microchip,mcp9985d
reg:
maxItems: 1
interrupts:
minItems: 1
maxItems: 2
interrupt-names:
description:
The chip family has three different interrupt pins divided among them.
The chips without "D" have alert-therm and therm-addr.
The chips with "D" have alert-therm and sys-shtdwn.
minItems: 1
items:
- enum: [alert-therm, therm-addr, sys-shtdwn]
- enum: [therm-addr, sys-shtdwn]
"#address-cells":
const: 1
"#size-cells":
const: 0
microchip,enable-anti-parallel:
description:
Enable anti-parallel diode mode operation.
MCP9984/84D/85/85D and MCP9933/33D support reading two external diodes
in anti-parallel connection on the same set of pins.
type: boolean
microchip,parasitic-res-on-channel1-2:
description:
Indicates that the chip and the diodes/transistors are sufficiently far
apart that a parasitic resistance is added to the wires, which can affect
the measurements. Due to the anti-parallel diode connections, channels
1 and 2 are affected together.
type: boolean
microchip,parasitic-res-on-channel3-4:
description:
Indicates that the chip and the diodes/transistors are sufficiently far
apart that a parasitic resistance is added to the wires, which can affect
the measurements. Due to the anti-parallel diode connections, channels
3 and 4 are affected together.
type: boolean
microchip,power-state:
description:
The chip can be set in Run state or Standby state. In Run state the ADC
is converting on all channels at the programmed conversion rate.
In Standby state the host must initiate a conversion cycle by writing
to the One-Shot register.
True value sets Run state.
Chips with "D" in the name can only be set in Run mode.
type: boolean
vdd-supply: true
patternProperties:
"^channel@[1-4]$":
description:
Represents the external temperature channels to which
a remote diode is connected.
type: object
properties:
reg:
items:
maxItems: 1
label:
description: Unique name to identify which channel this is.
required:
- reg
additionalProperties: false
required:
- compatible
- reg
- vdd-supply
allOf:
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9982d
- microchip,mcp9983d
- microchip,mcp9984d
- microchip,mcp9985d
- microchip,mcp9933d
then:
properties:
interrupt-names:
items:
enum:
- alert-therm
- sys-shtdwn
required:
- microchip,power-state
- microchip,parasitic-res-on-channel1-2
else:
properties:
microchip,power-state: true
interrupt-names:
items:
enum:
- alert-therm
- therm-addr
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9983d
- microchip,mcp9984d
- microchip,mcp9985d
then:
required:
- microchip,parasitic-res-on-channel3-4
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9982
- microchip,mcp9982d
then:
properties:
microchip,enable-anti-parallel: false
patternProperties:
"^channel@[2-4]$": false
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9983
- microchip,mcp9983d
then:
properties:
microchip,enable-anti-parallel: false
patternProperties:
"^channel@[3-4]$": false
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9933
- microchip,mcp9933d
then:
patternProperties:
"^channel@[3-4]$": false
- if:
properties:
compatible:
contains:
enum:
- microchip,mcp9984
- microchip,mcp9984d
then:
properties:
channel@4: false
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
temperature-sensor@4c {
compatible = "microchip,mcp9985";
reg = <0x4c>;
#address-cells = <1>;
#size-cells = <0>;
microchip,enable-anti-parallel;
microchip,parasitic-res-on-channel1-2;
microchip,parasitic-res-on-channel3-4;
vdd-supply = <&vdd>;
channel@1 {
reg = <1>;
label = "Room Temperature";
};
channel@2 {
reg = <2>;
label = "GPU Temperature";
};
};
};
...
|
