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As per the new ADC7 architecture used by the Qualcomm PMICs, each PMIC has the static Slave ID (SID) assigned by default. The primary PMIC PMK8350 is responsible for collecting the temperature/voltage data from the slave PMICs and exposing them via it's registers. For getting the measurements from the slave PMICs, PMK8350 uses the channel ID encoded with the SID of the relevant PMIC. So far, the dt-binding for the slave PMIC PM8350 assumed that there will be only one PM8350 in a system. So it harcoded SID 1 with channel IDs. But this got changed in platforms such as Lenovo X13s where there are a couple of PM8350 PMICs available. So to address multiple PM8350s, change the binding to accept the SID specified by the user and use it for encoding the channel ID. It should be noted that, even though the SID is static it is not globally unique. Only the primary PMIC has the unique SID id 0. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20221103095810.64606-2-manivannan.sadhasivam@linaro.org
258 lines
7.2 KiB
YAML
258 lines
7.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/thermal/qcom-spmi-adc-tm5.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm's SPMI PMIC ADC Thermal Monitoring
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maintainers:
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- Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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properties:
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compatible:
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enum:
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- qcom,spmi-adc-tm5
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- qcom,spmi-adc-tm5-gen2
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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"#thermal-sensor-cells":
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const: 1
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description:
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Number of cells required to uniquely identify the thermal sensors. Since
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we have multiple sensors this is set to 1
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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qcom,avg-samples:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: Number of samples to be used for measurement.
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Not applicable for Gen2 ADC_TM peripheral.
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enum:
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- 1
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- 2
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- 4
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- 8
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- 16
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default: 1
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qcom,decimation:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: This parameter is used to decrease ADC sampling rate.
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Quicker measurements can be made by reducing decimation ratio.
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Not applicable for Gen2 ADC_TM peripheral.
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enum:
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- 250
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- 420
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- 840
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default: 840
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patternProperties:
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"^([-a-z0-9]*)@[0-7]$":
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type: object
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description:
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Represent one thermal sensor.
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properties:
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reg:
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description: Specify the sensor channel. There are 8 channels in PMIC5's ADC TM
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minimum: 0
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maximum: 7
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io-channels:
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description:
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From common IIO binding. Used to pipe PMIC ADC channel to thermal monitor
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qcom,ratiometric:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Channel calibration type.
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If this property is specified VADC will use the VDD reference
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(1.875V) and GND for channel calibration. If property is not found,
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channel will be calibrated with 0V and 1.25V reference channels,
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also known as absolute calibration.
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qcom,hw-settle-time-us:
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description: Time between AMUX getting configured and the ADC starting conversion.
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enum: [15, 100, 200, 300, 400, 500, 600, 700, 1000, 2000, 4000, 8000, 16000, 32000, 64000, 128000]
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qcom,pre-scaling:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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description: Used for scaling the channel input signal before the
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signal is fed to VADC. The configuration for this node is to know the
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pre-determined ratio and use it for post scaling. It is a pair of
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integers, denoting the numerator and denominator of the fraction by
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which input signal is multiplied. For example, <1 3> indicates the
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signal is scaled down to 1/3 of its value before ADC measurement. If
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property is not found default value depending on chip will be used.
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items:
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- const: 1
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- enum: [ 1, 3, 4, 6, 20, 8, 10 ]
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qcom,avg-samples:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: Number of samples to be used for measurement.
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This property in child node is applicable only for Gen2 ADC_TM peripheral.
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enum:
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- 1
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- 2
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- 4
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- 8
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- 16
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default: 1
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qcom,decimation:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: This parameter is used to decrease ADC sampling rate.
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Quicker measurements can be made by reducing decimation ratio.
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This property in child node is applicable only for Gen2 ADC_TM peripheral.
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enum:
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- 85
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- 340
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- 1360
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default: 1360
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required:
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- reg
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- io-channels
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additionalProperties:
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false
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: qcom,spmi-adc-tm5
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then:
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patternProperties:
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"^([-a-z0-9]*)@[0-7]$":
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properties:
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qcom,decimation: false
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qcom,avg-samples: false
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- if:
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properties:
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compatible:
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contains:
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const: qcom,spmi-adc-tm5-gen2
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then:
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properties:
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qcom,avg-samples: false
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qcom,decimation: false
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required:
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- compatible
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- reg
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- interrupts
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- "#address-cells"
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- "#size-cells"
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- "#thermal-sensor-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/iio/qcom,spmi-vadc.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spmi_bus {
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#address-cells = <1>;
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#size-cells = <0>;
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pm8150b_adc: adc@3100 {
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reg = <0x3100>;
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compatible = "qcom,spmi-adc5";
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#address-cells = <1>;
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#size-cells = <0>;
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#io-channel-cells = <1>;
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/* Other properties are omitted */
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conn-therm@4f {
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reg = <ADC5_AMUX_THM3_100K_PU>;
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qcom,ratiometric;
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qcom,hw-settle-time = <200>;
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};
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};
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pm8150b_adc_tm: adc-tm@3500 {
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compatible = "qcom,spmi-adc-tm5";
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reg = <0x3500>;
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interrupts = <0x2 0x35 0x0 IRQ_TYPE_EDGE_RISING>;
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#thermal-sensor-cells = <1>;
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#address-cells = <1>;
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#size-cells = <0>;
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conn-therm@0 {
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reg = <0>;
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io-channels = <&pm8150b_adc ADC5_AMUX_THM3_100K_PU>;
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qcom,ratiometric;
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qcom,hw-settle-time-us = <200>;
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};
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};
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};
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- |
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#include <dt-bindings/iio/qcom,spmi-adc7-pmk8350.h>
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#include <dt-bindings/iio/qcom,spmi-adc7-pm8350.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spmi_bus {
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#address-cells = <1>;
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#size-cells = <0>;
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pmk8350_vadc: adc@3100 {
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reg = <0x3100>;
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compatible = "qcom,spmi-adc7";
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#address-cells = <1>;
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#size-cells = <0>;
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#io-channel-cells = <1>;
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/* Other properties are omitted */
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xo-therm@44 {
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reg = <PMK8350_ADC7_AMUX_THM1_100K_PU>;
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qcom,ratiometric;
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qcom,hw-settle-time = <200>;
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};
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conn-therm@147 {
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reg = <PM8350_ADC7_AMUX_THM4_100K_PU(1)>;
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qcom,ratiometric;
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qcom,hw-settle-time = <200>;
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};
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};
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pmk8350_adc_tm: adc-tm@3400 {
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compatible = "qcom,spmi-adc-tm5-gen2";
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reg = <0x3400>;
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interrupts = <0x0 0x34 0x0 IRQ_TYPE_EDGE_RISING>;
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#thermal-sensor-cells = <1>;
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#address-cells = <1>;
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#size-cells = <0>;
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pmk8350-xo-therm@0 {
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reg = <0>;
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io-channels = <&pmk8350_vadc PMK8350_ADC7_AMUX_THM1_100K_PU>;
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qcom,decimation = <340>;
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qcom,ratiometric;
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qcom,hw-settle-time-us = <200>;
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};
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conn-therm@1 {
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reg = <1>;
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io-channels = <&pmk8350_vadc PM8350_ADC7_AMUX_THM4_100K_PU(1)>;
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qcom,avg-samples = <2>;
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qcom,ratiometric;
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qcom,hw-settle-time-us = <200>;
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};
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};
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};
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...
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