xref: /linux/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml (revision ee057c8c194b9283f4137b253b70e292693a39f0) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/thermal/qcom-spmi-adc-tm5.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm's SPMI PMIC ADC Thermal Monitoring
8maintainers:
9  - Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
10
11$ref: thermal-sensor.yaml#
12
13properties:
14  compatible:
15    enum:
16      - qcom,spmi-adc-tm5
17      - qcom,spmi-adc-tm5-gen2
18      - qcom,adc-tm7 # Incomplete / subject to change
19
20  reg:
21    maxItems: 1
22
23  interrupts:
24    maxItems: 1
25
26  "#thermal-sensor-cells":
27    const: 1
28
29  "#address-cells":
30    const: 1
31
32  "#size-cells":
33    const: 0
34
35  qcom,avg-samples:
36    $ref: /schemas/types.yaml#/definitions/uint32
37    description: Number of samples to be used for measurement.
38            Not applicable for Gen2 ADC_TM peripheral.
39    enum:
40      - 1
41      - 2
42      - 4
43      - 8
44      - 16
45    default: 1
46
47  qcom,decimation:
48    $ref: /schemas/types.yaml#/definitions/uint32
49    description: This parameter is used to decrease ADC sampling rate.
50            Quicker measurements can be made by reducing decimation ratio.
51            Not applicable for Gen2 ADC_TM peripheral.
52    enum:
53      - 250
54      - 420
55      - 840
56    default: 840
57
58patternProperties:
59  "^([-a-z0-9]*)@[0-7]$":
60    type: object
61    description:
62      Represent one thermal sensor.
63
64    properties:
65      reg:
66        description: Specify the sensor channel. There are 8 channels in PMIC5's ADC TM
67        minimum: 0
68        maximum: 7
69
70      io-channels:
71        description:
72          From common IIO binding. Used to pipe PMIC ADC channel to thermal monitor
73
74      qcom,ratiometric:
75        $ref: /schemas/types.yaml#/definitions/flag
76        description:
77          Channel calibration type.
78          If this property is specified VADC will use the VDD reference
79          (1.875V) and GND for channel calibration. If property is not found,
80          channel will be calibrated with 0V and 1.25V reference channels,
81          also known as absolute calibration.
82
83      qcom,hw-settle-time-us:
84        description: Time between AMUX getting configured and the ADC starting conversion.
85        enum: [15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, 4000, 8000, 16000, 32000, 64000, 128000]
86
87      qcom,pre-scaling:
88        $ref: /schemas/types.yaml#/definitions/uint32-array
89        description: Used for scaling the channel input signal before the
90          signal is fed to VADC. The configuration for this node is to know the
91          pre-determined ratio and use it for post scaling. It is a pair of
92          integers, denoting the numerator and denominator of the fraction by
93          which input signal is multiplied. For example, <1 3> indicates the
94          signal is scaled down to 1/3 of its value before ADC measurement.  If
95          property is not found default value depending on chip will be used.
96        items:
97          - const: 1
98          - enum: [ 1, 3, 4, 6, 20, 8, 10 ]
99
100      qcom,avg-samples:
101        $ref: /schemas/types.yaml#/definitions/uint32
102        description: Number of samples to be used for measurement.
103          This property in child node is applicable only for Gen2 ADC_TM peripheral.
104        enum:
105          - 1
106          - 2
107          - 4
108          - 8
109          - 16
110        default: 1
111
112      qcom,decimation:
113        $ref: /schemas/types.yaml#/definitions/uint32
114        description: This parameter is used to decrease ADC sampling rate.
115          Quicker measurements can be made by reducing decimation ratio.
116          This property in child node is applicable only for Gen2 ADC_TM peripheral.
117        enum:
118          - 85
119          - 340
120          - 1360
121        default: 1360
122
123    required:
124      - reg
125      - io-channels
126
127    additionalProperties:
128      false
129
130allOf:
131  - if:
132      properties:
133        compatible:
134          contains:
135            const: qcom,spmi-adc-tm5
136
137    then:
138      patternProperties:
139        "^([-a-z0-9]*)@[0-7]$":
140          properties:
141            qcom,decimation: false
142            qcom,avg-samples: false
143
144  - if:
145      properties:
146        compatible:
147          contains:
148            const: qcom,spmi-adc-tm5-gen2
149
150    then:
151      properties:
152        qcom,avg-samples: false
153        qcom,decimation: false
154
155required:
156  - compatible
157  - reg
158  - interrupts
159  - "#address-cells"
160  - "#size-cells"
161
162unevaluatedProperties: false
163
164examples:
165  - |
166    #include <dt-bindings/iio/qcom,spmi-vadc.h>
167    #include <dt-bindings/interrupt-controller/irq.h>
168
169    pmic {
170        #address-cells = <1>;
171        #size-cells = <0>;
172
173        pm8150b_adc: adc@3100 {
174            compatible = "qcom,spmi-adc5";
175            reg = <0x3100>;
176            #address-cells = <1>;
177            #size-cells = <0>;
178            #io-channel-cells = <1>;
179
180            /* Other properties are omitted */
181            channel@4f {
182                reg = <ADC5_AMUX_THM3_100K_PU>;
183                qcom,ratiometric;
184                qcom,hw-settle-time = <200>;
185                label = "conn_therm";
186            };
187        };
188
189        adc-tm@3500 {
190            compatible = "qcom,spmi-adc-tm5";
191            reg = <0x3500>;
192            interrupts = <0x2 0x35 0x0 IRQ_TYPE_EDGE_RISING>;
193            #thermal-sensor-cells = <1>;
194            #address-cells = <1>;
195            #size-cells = <0>;
196
197            conn-therm@0 {
198                reg = <0>;
199                io-channels = <&pm8150b_adc ADC5_AMUX_THM3_100K_PU>;
200                qcom,ratiometric;
201                qcom,hw-settle-time-us = <200>;
202            };
203        };
204    };
205
206  - |
207    #include <dt-bindings/iio/qcom,spmi-adc7-pmk8350.h>
208    #include <dt-bindings/iio/qcom,spmi-adc7-pm8350.h>
209    #include <dt-bindings/interrupt-controller/irq.h>
210
211    pmic {
212        #address-cells = <1>;
213        #size-cells = <0>;
214
215        pmk8350_vadc: adc@3100 {
216            compatible = "qcom,spmi-adc7";
217            reg = <0x3100>;
218            #address-cells = <1>;
219            #size-cells = <0>;
220            #io-channel-cells = <1>;
221
222            /* Other properties are omitted */
223            channel@44 {
224                reg = <PMK8350_ADC7_AMUX_THM1_100K_PU>;
225                qcom,ratiometric;
226                qcom,hw-settle-time = <200>;
227                label = "xo_therm";
228            };
229
230            channel@147 {
231                reg = <PM8350_ADC7_AMUX_THM4_100K_PU(1)>;
232                qcom,ratiometric;
233                qcom,hw-settle-time = <200>;
234                label = "conn_therm";
235            };
236        };
237
238        adc-tm@3400 {
239            compatible = "qcom,spmi-adc-tm5-gen2";
240            reg = <0x3400>;
241            interrupts = <0x0 0x34 0x0 IRQ_TYPE_EDGE_RISING>;
242            #thermal-sensor-cells = <1>;
243            #address-cells = <1>;
244            #size-cells = <0>;
245
246            pmk8350-xo-therm@0 {
247                reg = <0>;
248                io-channels = <&pmk8350_vadc PMK8350_ADC7_AMUX_THM1_100K_PU>;
249                qcom,decimation = <340>;
250                qcom,ratiometric;
251                qcom,hw-settle-time-us = <200>;
252            };
253
254            conn-therm@1 {
255                reg = <1>;
256                io-channels = <&pmk8350_vadc PM8350_ADC7_AMUX_THM4_100K_PU(1)>;
257                qcom,avg-samples = <2>;
258                qcom,ratiometric;
259                qcom,hw-settle-time-us = <200>;
260            };
261        };
262    };
263...
264