[PATCH 1/5] dt-bindings: thermal: qcom: add adc-thermal monitor bindings

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

Add bindings for thermal monitor, part of Qualcomm PMIC5 chips. It is a
close counterpart of VADC part of those PMICs.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 .../bindings/thermal/qcom-spmi-adc-tm5.yaml   | 143 ++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml

diff --git a/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml b/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
new file mode 100644
index 000000000000..16d3f61d692a
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/qcom-spmi-adc-tm5.yaml
@@ -0,0 +1,143 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/qcom-spmi-adc-tm5.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm's SPMI PMIC ADC-TM
+maintainers:
+  - Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
+
+properties:
+  compatible:
+    const: qcom,spmi-adc-tm5
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#thermal-sensor-cells":
+    const: 1
+    description:
+      Number of cells required to uniquely identify the thermal sensors. Since
+      we have multiple sensors this is set to 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  io-channels:
+    description:
+      From common IIO binding. Used to pipe PMIC ADC channel to thermal monitor
+
+  io-channel-names:
+    description:
+      From common IIO binding. Names each of IIO channels. The name should
+      be equal to the sensor's subnode name.
+
+  qcom,avg-samples:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of samples to be used for measurement.
+    enum:
+      - 1
+      - 2
+      - 4
+      - 8
+      - 16
+    default: 1
+
+  qcom,decimation:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: This parameter is used to decrease ADC sampling rate.
+    enum:
+      - 250
+      - 420
+      - 840
+    default: 840
+
+patternProperties:
+  "^([-a-z0-9]*)@[0-9]+$":
+    type: object
+    description:
+      Represent one thermal sensor.
+
+    properties:
+      reg:
+        description: Specify the sensor channel.
+        maxItems: 1
+
+      qcom,adc-channel:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Corresponding ADC channel ID.
+
+      qcom,ratiometric:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description:
+          Channel calibration type.
+          If this property is specified VADC will use the VDD reference
+          (1.875V) and GND for channel calibration. If property is not found,
+          channel will be calibrated with 0V and 1.25V reference channels,
+          also known as absolute calibration.
+
+      qcom,hw-settle-time:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Time between AMUX getting configured and the ADC starting conversion.
+
+      qcom,pre-scaling:
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        description: Used for scaling the channel input signal before the signal is fed to VADC. See qcom,spi-vadc specification for the list of possible values.
+        minItems: 2
+        maxItems: 2
+
+    required:
+      - reg
+      - qcom,adc-channel
+
+    additionalProperties:
+      false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#address-cells"
+  - "#size-cells"
+  - "#thermal-sensor-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+		pm8150b_adc: adc@3100 {
+			compatible = "qcom,spmi-adc5";
+			/* Other propreties are omitted */
+			conn-therm@4f {
+				reg = <ADC5_AMUX_THM3_100K_PU>;
+				qcom,ratiometric;
+				qcom,hw-settle-time = <200>;
+			};
+		};
+		pm8150b_adc_tm: adc-tm@3500 {
+			compatible = "qcom,spmi-adc-tm5";
+			reg = <0x3500>;
+			interrupts = <0x2 0x35 0x0 IRQ_TYPE_EDGE_RISING>;
+			#thermal-sensor-cells = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			io-channels = <&pm8150b_adc ADC5_AMUX_THM3_100K_PU>;
+			io-channel-names = "conn-therm";
+
+			conn-therm@0 {
+				reg = <0>;
+				qcom,adc-channel = <ADC5_AMUX_THM3_100K_PU>;
+				qcom,ratiometric;
+				qcom,hw-settle-time = <200>;
+			};
+		};
+
+
+...
-- 
2.27.0