qcom-spmi-adc-tm5.yaml

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    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 properties:
   12   compatible:
   13     enum:
   14       - qcom,spmi-adc-tm5
   15       - qcom,spmi-adc-tm5-gen2
   16 
   17   reg:
   18     maxItems: 1
   19 
   20   interrupts:
   21     maxItems: 1
   22 
   23   "#thermal-sensor-cells":
   24     const: 1
   25     description:
   26       Number of cells required to uniquely identify the thermal sensors. Since
   27       we have multiple sensors this is set to 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   - "#thermal-sensor-cells"
  162 
  163 additionalProperties: false
  164 
  165 examples:
  166   - |
  167     #include <dt-bindings/iio/qcom,spmi-vadc.h>
  168     #include <dt-bindings/interrupt-controller/irq.h>
  169     spmi_bus {
  170         #address-cells = <1>;
  171         #size-cells = <0>;
  172         pm8150b_adc: adc@3100 {
  173             reg = <0x3100>;
  174             compatible = "qcom,spmi-adc5";
  175             #address-cells = <1>;
  176             #size-cells = <0>;
  177             #io-channel-cells = <1>;
  178 
  179             /* Other properties are omitted */
  180             conn-therm@4f {
  181                 reg = <ADC5_AMUX_THM3_100K_PU>;
  182                 qcom,ratiometric;
  183                 qcom,hw-settle-time = <200>;
  184             };
  185         };
  186 
  187         pm8150b_adc_tm: adc-tm@3500 {
  188             compatible = "qcom,spmi-adc-tm5";
  189             reg = <0x3500>;
  190             interrupts = <0x2 0x35 0x0 IRQ_TYPE_EDGE_RISING>;
  191             #thermal-sensor-cells = <1>;
  192             #address-cells = <1>;
  193             #size-cells = <0>;
  194 
  195             conn-therm@0 {
  196                 reg = <0>;
  197                 io-channels = <&pm8150b_adc ADC5_AMUX_THM3_100K_PU>;
  198                 qcom,ratiometric;
  199                 qcom,hw-settle-time-us = <200>;
  200             };
  201         };
  202     };
  203 
  204   - |
  205     #include <dt-bindings/iio/qcom,spmi-adc7-pmk8350.h>
  206     #include <dt-bindings/iio/qcom,spmi-adc7-pm8350.h>
  207     #include <dt-bindings/interrupt-controller/irq.h>
  208     spmi_bus {
  209         #address-cells = <1>;
  210         #size-cells = <0>;
  211         pmk8350_vadc: adc@3100 {
  212             reg = <0x3100>;
  213             compatible = "qcom,spmi-adc7";
  214             #address-cells = <1>;
  215             #size-cells = <0>;
  216             #io-channel-cells = <1>;
  217 
  218             /* Other properties are omitted */
  219             xo-therm@44 {
  220                 reg = <PMK8350_ADC7_AMUX_THM1_100K_PU>;
  221                 qcom,ratiometric;
  222                 qcom,hw-settle-time = <200>;
  223             };
  224 
  225             conn-therm@47 {
  226                 reg = <PM8350_ADC7_AMUX_THM4_100K_PU>;
  227                 qcom,ratiometric;
  228                 qcom,hw-settle-time = <200>;
  229             };
  230         };
  231 
  232         pmk8350_adc_tm: adc-tm@3400 {
  233             compatible = "qcom,spmi-adc-tm5-gen2";
  234             reg = <0x3400>;
  235             interrupts = <0x0 0x34 0x0 IRQ_TYPE_EDGE_RISING>;
  236             #thermal-sensor-cells = <1>;
  237             #address-cells = <1>;
  238             #size-cells = <0>;
  239 
  240             pmk8350-xo-therm@0 {
  241                 reg = <0>;
  242                 io-channels = <&pmk8350_vadc PMK8350_ADC7_AMUX_THM1_100K_PU>;
  243                 qcom,decimation = <340>;
  244                 qcom,ratiometric;
  245                 qcom,hw-settle-time-us = <200>;
  246             };
  247 
  248             conn-therm@1 {
  249                 reg = <1>;
  250                 io-channels = <&pmk8350_vadc PM8350_ADC7_AMUX_THM4_100K_PU>;
  251                 qcom,avg-samples = <2>;
  252                 qcom,ratiometric;
  253                 qcom,hw-settle-time-us = <200>;
  254             };
  255         };
  256     };
  257 ...

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