linux-kernel - Re: [PATCH 1/4] dt-bindings: mfd: Add sony,cronos-cpld

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Message-ID: <20250929141113.GA3987541-robh@kernel.org>
Date: Mon, 29 Sep 2025 09:11:13 -0500
From: Rob Herring <robh@...nel.org>
To: Timothy Pearson <tpearson@...torengineering.com>
Cc: devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Lee Jones <lee@...nel.org>,
	Georgy Yakovlev <Georgy.Yakovlev@...y.com>,
	Shawn Anastasio <sanastasio@...torengineering.com>
Subject: Re: [PATCH 1/4] dt-bindings: mfd: Add sony,cronos-cpld

On Thu, Sep 25, 2025 at 01:17:33PM -0500, Timothy Pearson wrote:
> The Sony Cronos Platform Controller CPLD is a multi-purpose platform
> controller that provides both a watchdog timer and an LED controller for
> the Sony Interactive Entertainment Cronos x86 server platform. As both
> functions are provided by the same CPLD, a multi-function device is
> exposed as the parent of both functions.
> 
> Add a DT binding for this device.
> 
> Signed-off-by: Shawn Anastasio <sanastasio@...torengineering.com>
> Signed-off-by: Timothy Pearson <tpearson@...torengineering.com>
> ---
>  .../bindings/mfd/sony,cronos-cpld.yaml        | 121 ++++++++++++++++++
>  1 file changed, 121 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/sony,cronos-cpld.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/sony,cronos-cpld.yaml b/Documentation/devicetree/bindings/mfd/sony,cronos-cpld.yaml
> new file mode 100644
> index 000000000000..3cebf6c0153d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/sony,cronos-cpld.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2025 Raptor Engineering, LLC
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/sony,cronos-cpld.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sony Cronos Platform Controller CPLD multi-function device
> +
> +maintainers:
> +  - Georgy Yakovlev <Georgy.Yakovlev@...y.com>
> +
> +description: |

Don't need '|' if no formatting or paragraphs to preserve.

> +  The Sony Cronos Platform Controller CPLD is a multi-purpose platform
> +  controller that provides both a watchdog timer and an LED controller for the
> +  Sony Interactive Entertainment Cronos x86 server platform. As both functions
> +  are provided by the same CPLD, a multi-function device is exposed as the
> +  parent of both functions.
> +
> +properties:
> +  compatible:
> +    const: sony,cronos-cpld
> +
> +  reg:
> +    maxItems: 1
> +
> +  leds:
> +    type: object
> +    additionalProperties: false
> +    description: |
> +      The Cronos LED controller is a subfunction of the Cronos platform
> +      controller, which is a multi-function device.
> +
> +      Each led is represented as a child node of sony,cronos-led. Fifteen RGB
> +      LEDs are supported by the platform.
> +
> +    properties:
> +      compatible:
> +        const: sony,cronos-led
> +
> +      reg:
> +        maxItems: 1
> +
> +      "#address-cells":
> +        const: 1
> +
> +      "#size-cells":
> +        const: 0
> +
> +    patternProperties:
> +      "^multi-led@[0-15]$":
> +        type: object
> +        $ref: leds-class-multicolor.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          reg:
> +            description:
> +              LED channel number (0..15)
> +            minimum: 0
> +            maximum: 15
> +
> +        required:
> +          - reg
> +
> +    required:
> +      - compatible
> +      - "#address-cells"
> +      - "#size-cells"
> +
> +  watchdog:
> +    type: object
> +    description: Cronos Platform Watchdog Timer
> +
> +    allOf:
> +      - $ref: watchdog.yaml#
> +
> +    properties:
> +      compatible:
> +        const: sony,cronos-watchdog

There's no need for a child node here. 'timeout-sec' can just go in the 
parent node.

Rob