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ceccd196e1
Add bindings for the Surface System Aggregator Module (SAM/SSAM), the Microsoft Surface-standard Embedded Controller, used on both x86- and Qualcomm-based devices. It provides a plethora of functions, depending on what's wired up to it. That includes but is not limited to: fan control, keyboard/touchpad support, thermal sensors, power control, special buttons, tablet mode. Signed-off-by: Konrad Dybcio <quic_kdybcio@quicinc.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240814-topic-sam-v3-2-a84588aad233@quicinc.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
48 lines
1.1 KiB
YAML
48 lines
1.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/platform/microsoft,surface-sam.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Surface System Aggregator Module (SAM, SSAM)
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maintainers:
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- Konrad Dybcio <konradybcio@kernel.org>
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description: |
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Surface devices use a standardized embedded controller to let the
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operating system interface with various hardware functions. The
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specific functionalities are modeled as subdevices and matched on
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five levels: domain, category, target, instance and function.
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properties:
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compatible:
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const: microsoft,surface-sam
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interrupts:
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maxItems: 1
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current-speed: true
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required:
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- compatible
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- interrupts
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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uart {
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embedded-controller {
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compatible = "microsoft,surface-sam";
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interrupts-extended = <&tlmm 91 IRQ_TYPE_EDGE_RISING>;
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pinctrl-0 = <&ssam_state>;
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pinctrl-names = "default";
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current-speed = <4000000>;
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};
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};
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