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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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b709ff4da1
Samsung Exynos SoC reuses several devices from older designs, thus historically we kept the old (block's) compatible only. This works fine and there is no bug here, however guidelines expressed in Documentation/devicetree/bindings/writing-bindings.rst state that: 1. Compatibles should be specific. 2. We should add new compatibles in case of bugs or features. Add compatibles specific to each SoC in front of all old-SoC-like compatibles. Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20231108104343.24192-11-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
169 lines
3.7 KiB
YAML
169 lines
3.7 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/samsung,exynos-adc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung Exynos Analog to Digital Converter (ADC)
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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properties:
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compatible:
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oneOf:
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- enum:
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- samsung,exynos-adc-v1 # Exynos5250
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- samsung,exynos-adc-v2
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- samsung,exynos3250-adc
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- samsung,exynos4212-adc # Exynos4212 and Exynos4412
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- samsung,exynos7-adc
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- samsung,s3c2410-adc
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- samsung,s3c2416-adc
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- samsung,s3c2440-adc
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- samsung,s3c2443-adc
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- samsung,s3c6410-adc
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- samsung,s5pv210-adc
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- items:
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- enum:
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- samsung,exynos5433-adc
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- const: samsung,exynos7-adc
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reg:
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maxItems: 1
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clocks:
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description:
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Phandle to ADC bus clock. For Exynos3250 additional clock is needed.
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minItems: 1
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maxItems: 2
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clock-names:
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description:
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Must contain clock names (adc, sclk) matching phandles in clocks
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property.
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minItems: 1
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maxItems: 2
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interrupts:
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description:
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ADC interrupt followed by optional touchscreen interrupt.
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minItems: 1
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maxItems: 2
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"#io-channel-cells":
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const: 1
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vdd-supply: true
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samsung,syscon-phandle:
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$ref: /schemas/types.yaml#/definitions/phandle
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description:
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Phandle to the PMU system controller node (to access the ADC_PHY
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register on Exynos3250/4x12/5250/5420/5800).
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has-touchscreen:
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description:
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If present, indicates that a touchscreen is connected and usable.
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type: boolean
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- interrupts
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- "#io-channel-cells"
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- vdd-supply
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additionalProperties:
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type: object
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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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- samsung,exynos-adc-v1
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- samsung,exynos-adc-v2
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- samsung,exynos3250-adc
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- samsung,exynos4212-adc
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then:
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required:
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- samsung,syscon-phandle
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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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- samsung,exynos3250-adc
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then:
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properties:
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clocks:
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minItems: 2
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maxItems: 2
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clock-names:
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items:
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- const: adc
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- const: sclk
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else:
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properties:
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clocks:
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minItems: 1
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maxItems: 1
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clock-names:
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items:
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- const: adc
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- if:
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required:
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- has-touchscreen
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then:
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properties:
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interrupts:
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minItems: 2
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maxItems: 2
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examples:
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- |
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adc: adc@12d10000 {
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compatible = "samsung,exynos-adc-v1";
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reg = <0x12d10000 0x100>;
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interrupts = <0 106 0>;
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#io-channel-cells = <1>;
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clocks = <&clock 303>;
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clock-names = "adc";
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vdd-supply = <&buck5_reg>;
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samsung,syscon-phandle = <&pmu_system_controller>;
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/* NTC thermistor is a hwmon device */
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thermistor {
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compatible = "murata,ncp15wb473";
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pullup-uv = <1800000>;
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pullup-ohm = <47000>;
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pulldown-ohm = <0>;
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io-channels = <&adc 4>;
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};
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};
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- |
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#include <dt-bindings/clock/exynos3250.h>
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adc@126c0000 {
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compatible = "samsung,exynos3250-adc";
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reg = <0x126c0000 0x100>;
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interrupts = <0 137 0>;
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#io-channel-cells = <1>;
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clocks = <&cmu CLK_TSADC>,
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<&cmu CLK_SCLK_TSADC>;
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clock-names = "adc", "sclk";
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vdd-supply = <&buck5_reg>;
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samsung,syscon-phandle = <&pmu_system_controller>;
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};
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