1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/hwmon/moortec,mr75203.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Moortec Semiconductor MR75203 PVT Controller
8
9maintainers:
10  - Rahul Tanwar <rtanwar@maxlinear.com>
11
12description: |
13  A Moortec PVT (Process, Voltage, Temperature) monitoring logic design can
14  include many different units.
15  Such a design will usually consists of several Moortec's embedded analog IPs,
16  and a single Moortec controller (mr75203) to configure and control the IPs.
17
18  Some of the Moortec's analog hard IPs that can be used in a design:
19  *) Temperature Sensor (TS) - used to monitor core temperature (e.g. mr74137).
20  *) Voltage Monitor (VM) - used to monitor voltage levels (e.g. mr74138).
21  *) Process Detector (PD) - used to assess silicon speed (e.g. mr74139).
22  *) Delay Chain - ring oscillator connected to the PD, used to measure IO
23     based transistors (e.g. mr76008 ring oscillator at 1.1V, mr76007 ring
24     oscillator at 1.8V).
25  *) Pre Scaler - provides divide-by-X scaling of input voltage, which can then
26     be presented for VM for measurement within its range (e.g. mr76006 -
27     divide by 2 pre-scaler).
28
29  TS, VM & PD also include a digital interface, which consists of configuration
30  inputs and measurement outputs.
31
32  Some of the units have number of series, each series can have slightly
33  different characteristics.
34
35  The mr75203 binding describes configuration for the controller unit, but also
36  for some of the analog IPs.
37
38properties:
39  compatible:
40    const: moortec,mr75203
41
42  reg:
43    items:
44      - description: PVT common registers
45      - description: PVT temprature sensor registers
46      - description: PVT process detector registers
47      - description: PVT voltage monitor registers
48
49  reg-names:
50    items:
51      - const: common
52      - const: ts
53      - const: pd
54      - const: vm
55
56  intel,vm-map:
57    description:
58      PVT controller has 5 VM (voltage monitor) sensors.
59      vm-map defines CPU core to VM instance mapping. A
60      value of 0xff means that VM sensor is unused.
61    $ref: /schemas/types.yaml#/definitions/uint8-array
62    maxItems: 5
63
64  clocks:
65    maxItems: 1
66
67  resets:
68    maxItems: 1
69
70  "#thermal-sensor-cells":
71    const: 1
72
73  moortec,vm-active-channels:
74    description:
75      Defines the number of channels per VM that are actually used and are
76      connected to some input source.
77      Maximum number of items - number of VMs.
78      Maximum value of each item - number of channels.
79      Minimum value of each item - 0 (which means entire VM sensor is not used).
80    $ref: /schemas/types.yaml#/definitions/uint8-array
81
82  moortec,vm-pre-scaler-x2:
83    description:
84      Defines the channels that use a mr76006 pre-scaler to divide the input
85      source by 2.
86      The pre-scaler is used for input sources that exceed the VM input range.
87      The driver uses this information to present to the user with the actual
88      value of the voltage source.
89      For channels that are not listed, no pre-scaler is assumed.
90      Maximum number of items - total number of channels in all VMs.
91      Each channel should not appear more than once.
92    $ref: /schemas/types.yaml#/definitions/uint8-array
93
94  moortec,ts-series:
95    description:
96      Definition of the temperature equation and coefficients that shall be
97      used to convert the digital output to value in milli-Celsius.
98    minimum: 5
99    maximum: 6
100    default: 5
101    $ref: /schemas/types.yaml#/definitions/uint32
102
103  moortec,ts-coeff-g:
104    description:
105      G coefficient for temperature equation.
106      Default for series 5 = 60000
107      Default for series 6 = 57400
108    multipleOf: 100
109    minimum: 1000
110    $ref: /schemas/types.yaml#/definitions/uint32
111
112  moortec,ts-coeff-h:
113    description:
114      H coefficient for temperature equation.
115      Default for series 5 = 200000
116      Default for series 6 = 249400
117    multipleOf: 100
118    minimum: 1000
119    $ref: /schemas/types.yaml#/definitions/uint32
120
121  moortec,ts-coeff-cal5:
122    description:
123      cal5 coefficient for temperature equation.
124      Default for series 5 = 4094
125      Default for series 6 = 4096
126    minimum: 1
127    $ref: /schemas/types.yaml#/definitions/uint32
128
129  moortec,ts-coeff-j:
130    description:
131      J coefficient for temperature equation.
132      Default for series 5 = -100
133      Default for series 6 = 0
134    multipleOf: 100
135    maximum: 0
136    $ref: /schemas/types.yaml#/definitions/int32
137
138required:
139  - compatible
140  - reg
141  - reg-names
142  - clocks
143  - "#thermal-sensor-cells"
144
145additionalProperties: false
146
147examples:
148  - |
149    pvt: pvt@e0680000 {
150        compatible = "moortec,mr75203";
151        reg = <0xe0680000 0x80>,
152              <0xe0680080 0x180>,
153              <0xe0680200 0x200>,
154              <0xe0680400 0xc00>;
155        reg-names = "common", "ts", "pd", "vm";
156        intel,vm-map = [03 01 04 ff ff];
157        clocks = <&osc0>;
158        resets = <&rcu0 0x40 7>;
159        moortec,vm-active-channels = /bits/ 8 <0x10 0x05>;
160        moortec,vm-pre-scaler-x2 = /bits/ 8 <5 6 20>;
161        moortec,ts-coeff-g = <61400>;
162        moortec,ts-coeff-h = <253700>;
163        #thermal-sensor-cells = <1>;
164    };
165