linux-kernel - Re: [PATCH v2 1/6] dt-bindings: mfd: add Khadas Microcontroller bindings

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Date:   Fri, 15 May 2020 12:12:39 +0530
From:   Amit Kucheria <amit.kucheria@...durent.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Srini Kandagatla <srinivas.kandagatla@...aro.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, linux-amlogic@...ts.infradead.org,
        Linux PM list <linux-pm@...r.kernel.org>,
        lakml <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 1/6] dt-bindings: mfd: add Khadas Microcontroller bindings

On Tue, May 12, 2020 at 6:56 PM Neil Armstrong <narmstrong@...libre.com> 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@...libre.com>
> Reviewed-by: Rob Herring <robh@...nel.org>

Reviewed-by: Amit Kucheria <amit.kucheria@...aro.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@...libre.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
>