On Tue, May 12, 2020 at 6:56 PM Neil Armstrong <narmstrong@xxxxxxxxxxxx> wrote: > > 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@xxxxxxxxxxxx> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> Reviewed-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx> > --- > .../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@xxxxxxxxxxxx> > + > +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 >
