dt-bindings: thermal: tsens: Convert over to a yaml schema
Older IP only supports the 'uplow' interrupt, but newer IP supports 'uplow' and 'critical' interrupts. Document interrupt support in the tsens driver by converting over to a YAML schema. Suggested-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/d519be4c7198f47c3661f7326d1a724b97dc4973.1572526427.git.amit.kucheria@linaro.orgalistair/sunxi64-5.5-dsi
Amit Kucheria
Daniel Lezcano
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* QCOM SoC Temperature Sensor (TSENS)
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Required properties:
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- compatible:
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Must be one of the following:
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- "qcom,msm8916-tsens" (MSM8916)
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- "qcom,msm8974-tsens" (MSM8974)
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- "qcom,msm8996-tsens" (MSM8996)
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- "qcom,qcs404-tsens", "qcom,tsens-v1" (QCS404)
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- "qcom,msm8998-tsens", "qcom,tsens-v2" (MSM8998)
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- "qcom,sdm845-tsens", "qcom,tsens-v2" (SDM845)
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The generic "qcom,tsens-v2" property must be used as a fallback for any SoC
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with version 2 of the TSENS IP. MSM8996 is the only exception because the
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generic property did not exist when support was added.
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Similarly, the generic "qcom,tsens-v1" property must be used as a fallback for
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any SoC with version 1 of the TSENS IP.
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- reg: Address range of the thermal registers.
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New platforms containing v2.x.y of the TSENS IP must specify the SROT and TM
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register spaces separately, with order being TM before SROT.
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See Example 2, below.
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- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
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- #qcom,sensors: Number of sensors in tsens block
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- Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify
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nvmem cells
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Example 1 (legacy support before a fallback tsens-v2 property was introduced):
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tsens: thermal-sensor@900000 {
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compatible = "qcom,msm8916-tsens";
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reg = <0x4a8000 0x2000>;
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nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;
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nvmem-cell-names = "caldata", "calsel";
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#thermal-sensor-cells = <1>;
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};
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Example 2 (for any platform containing v2 of the TSENS IP):
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tsens0: thermal-sensor@c263000 {
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compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
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reg = <0xc263000 0x1ff>, /* TM */
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<0xc222000 0x1ff>; /* SROT */
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#qcom,sensors = <13>;
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#thermal-sensor-cells = <1>;
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};
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Example 3 (for any platform containing v1 of the TSENS IP):
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tsens: thermal-sensor@4a9000 {
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compatible = "qcom,qcs404-tsens", "qcom,tsens-v1";
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reg = <0x004a9000 0x1000>, /* TM */
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<0x004a8000 0x1000>; /* SROT */
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nvmem-cells = <&tsens_caldata>;
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nvmem-cell-names = "calib";
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#qcom,sensors = <10>;
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#thermal-sensor-cells = <1>;
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};
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@ -0,0 +1,168 @@
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# SPDX-License-Identifier: (GPL-2.0 OR MIT)
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# Copyright 2019 Linaro Ltd.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/thermal/qcom-tsens.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: QCOM SoC Temperature Sensor (TSENS)
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maintainers:
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- Amit Kucheria <amit.kucheria@linaro.org>
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description: |
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QCOM SoCs have TSENS IP to allow temperature measurement. There are currently
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three distinct major versions of the IP that is supported by a single driver.
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The IP versions are named v0.1, v1 and v2 in the driver, where v0.1 captures
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everything before v1 when there was no versioning information.
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properties:
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compatible:
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oneOf:
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- description: v0.1 of TSENS
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items:
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- enum:
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- qcom,msm8916-tsens
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- qcom,msm8974-tsens
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- const: qcom,tsens-v0_1
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- description: v1 of TSENS
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items:
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- enum:
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- qcom,qcs404-tsens
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- const: qcom,tsens-v1
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- description: v2 of TSENS
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items:
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- enum:
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- qcom,msm8996-tsens
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- qcom,msm8998-tsens
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- qcom,sdm845-tsens
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- const: qcom,tsens-v2
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reg:
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maxItems: 2
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items:
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- description: TM registers
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- description: SROT registers
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nvmem-cells:
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minItems: 1
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maxItems: 2
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description:
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Reference to an nvmem node for the calibration data
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nvmem-cells-names:
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minItems: 1
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maxItems: 2
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items:
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- enum:
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- caldata
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- calsel
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"#qcom,sensors":
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allOf:
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- $ref: /schemas/types.yaml#/definitions/uint32
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- minimum: 1
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- maximum: 16
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description:
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Number of sensors enabled on this platform
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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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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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enum:
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- qcom,msm8916-tsens
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- qcom,msm8974-tsens
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- qcom,qcs404-tsens
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- qcom,tsens-v0_1
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- qcom,tsens-v1
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then:
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properties:
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interrupts:
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items:
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- description: Combined interrupt if upper or lower threshold crossed
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interrupt-names:
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items:
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- const: uplow
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else:
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properties:
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interrupts:
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items:
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- description: Combined interrupt if upper or lower threshold crossed
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- description: Interrupt if critical threshold crossed
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interrupt-names:
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items:
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- const: uplow
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- const: critical
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required:
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- compatible
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- reg
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- "#qcom,sensors"
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- interrupts
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- interrupt-names
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- "#thermal-sensor-cells"
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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// Example 1 (legacy: for pre v1 IP):
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tsens1: thermal-sensor@900000 {
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compatible = "qcom,msm8916-tsens", "qcom,tsens-v0_1";
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reg = <0x4a9000 0x1000>, /* TM */
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<0x4a8000 0x1000>; /* SROT */
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nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;
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nvmem-cell-names = "caldata", "calsel";
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interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "uplow";
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#qcom,sensors = <5>;
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#thermal-sensor-cells = <1>;
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};
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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// Example 2 (for any platform containing v1 of the TSENS IP):
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tsens2: thermal-sensor@4a9000 {
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compatible = "qcom,qcs404-tsens", "qcom,tsens-v1";
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reg = <0x004a9000 0x1000>, /* TM */
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<0x004a8000 0x1000>; /* SROT */
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nvmem-cells = <&tsens_caldata>;
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nvmem-cell-names = "calib";
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interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "uplow";
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#qcom,sensors = <10>;
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#thermal-sensor-cells = <1>;
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};
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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// Example 3 (for any platform containing v2 of the TSENS IP):
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tsens3: thermal-sensor@c263000 {
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compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
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reg = <0xc263000 0x1ff>,
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<0xc222000 0x1ff>;
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interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 508 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "uplow", "critical";
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#qcom,sensors = <13>;
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#thermal-sensor-cells = <1>;
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};
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...
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@ -13516,6 +13516,7 @@ L: linux-pm@vger.kernel.org
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L: linux-arm-msm@vger.kernel.org
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S: Maintained
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F: drivers/thermal/qcom/
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F: Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
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QUALCOMM VENUS VIDEO ACCELERATOR DRIVER
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M: Stanimir Varbanov <stanimir.varbanov@linaro.org>
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