From: Konrad Dybcio <quic_kdybcio@xxxxxxxxxxx> 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@xxxxxxxxxxx> --- .../bindings/platform/microsoft,surface-sam.yaml | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/Documentation/devicetree/bindings/platform/microsoft,surface-sam.yaml b/Documentation/devicetree/bindings/platform/microsoft,surface-sam.yaml new file mode 100644 index 000000000000..f613738aa31d --- /dev/null +++ b/Documentation/devicetree/bindings/platform/microsoft,surface-sam.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/platform/microsoft,surface-sam.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Surface System Aggregator Module (SAM, SSAM) + +maintainers: + - Konrad Dybcio <konradybcio@xxxxxxxxxx> + +description: | + Surface devices use a standardized embedded controller to let the + operating system interface with various hardware functions. The + specific functionalities are modeled as subdevices and matched on + five levels: domain, category, target, instance and function. + +properties: + compatible: + const: microsoft,surface-sam + + interrupts: + maxItems: 1 + + current-speed: + description: The baudrate in bits per second of the device as it comes + online, current active speed. + $ref: /schemas/types.yaml#/definitions/uint32 + +required: + - compatible + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + uart { + embedded-controller { + compatible = "microsoft,surface-sam"; + + interrupts-extended = <&tlmm 91 IRQ_TYPE_EDGE_RISING>; + + pinctrl-0 = <&ssam_state>; + pinctrl-names = "default"; + + current-speed = <4000000>; + }; + }; -- 2.46.0
