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
7 title: Qualcomm's SPMI PMIC ADC Thermal Monitoring
8 maintainers:
9 - Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
10
11 $ref: thermal-sensor.yaml#
12
13 properties:
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 $ref: /schemas/types.yaml#/definitions/uint32
49 description: This parameter is used to decrease ADC sampling rate.
50 Quicker measurements can be made by reducing decimation ratio.
51 Not applicable for Gen2 ADC_TM peripheral.
52 enum:
53 - 250
54 - 420
55 - 840
56 default: 840
57
58 patternProperties:
59 "^([-a-z0-9]*)@[0-7]$":
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 $ref: /schemas/types.yaml#/definitions/uint32
114 description: This parameter is used to decrease ADC sampling rate.
115 Quicker measurements can be made by reducing decimation ratio.
116 This property in child node is applicable only for Gen2 ADC_TM peripheral.
117 enum:
118 - 85
119 - 340
120 - 1360
121 default: 1360
122
123 required:
124 - reg
125 - io-channels
126
127 additionalProperties:
128 false
129
130 allOf:
131 - if:
132 properties:
133 compatible:
134 contains:
135 const: qcom,spmi-adc-tm5
136
137 then:
138 patternProperties:
139 "^([-a-z0-9]*)@[0-7]$":
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
155 required:
156 - compatible
157 - reg
158 - interrupts
159 - "#address-cells"
160 - "#size-cells"
161
162 unevaluatedProperties: false
163
164 examples:
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 ...
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