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    Subject[PATCH v3 1/5] dt-bindings: mfd: add Khadas Microcontroller bindings
    Date
    This Microcontroller is present on the Khadas VIM1, VIM2, VIM3 and Edge
    boards.

    It has multiple boot control features like password check, power-on
    options, power-off control and system FAN control on recent boards.

    Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
    Reviewed-by: Rob Herring <robh@kernel.org>
    ---
    .../devicetree/bindings/mfd/khadas,mcu.yaml | 44 +++++++++++++++++++
    1 file changed, 44 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/mfd/khadas,mcu.yaml

    diff --git a/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
    new file mode 100644
    index 000000000000..a3b976f101e8
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/mfd/khadas,mcu.yaml
    @@ -0,0 +1,44 @@
    +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    +%YAML 1.2
    +---
    +$id: http://devicetree.org/schemas/mfd/khadas,mcu.yaml#
    +$schema: http://devicetree.org/meta-schemas/core.yaml#
    +
    +title: Khadas on-board Microcontroller Device Tree Bindings
    +
    +maintainers:
    + - Neil Armstrong <narmstrong@baylibre.com>
    +
    +description: |
    + Khadas embeds a microcontroller on their VIM and Edge boards adding some
    + system feature as PWM Fan control (for VIM2 rev14 or VIM3), User memory
    + storage, IR/Key resume control, system power LED control and more.
    +
    +properties:
    + compatible:
    + enum:
    + - khadas,mcu # MCU revision is discoverable
    +
    + "#cooling-cells": # Only needed for boards having FAN control feature
    + const: 2
    +
    + reg:
    + maxItems: 1
    +
    +required:
    + - compatible
    + - reg
    +
    +additionalProperties: false
    +
    +examples:
    + - |
    + i2c {
    + #address-cells = <1>;
    + #size-cells = <0>;
    + khadas_mcu: system-controller@18 {
    + compatible = "khadas,mcu";
    + reg = <0x18>;
    + #cooling-cells = <2>;
    + };
    + };
    --
    2.22.0
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