linux-kernel - Re: [PATCH v2 1/5] dt-bindings: aspeed: Add eSPI controller

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Date:   Fri, 20 Aug 2021 15:01:55 -0500
From:   Rob Herring <robh@...nel.org>
To:     Chia-Wei Wang <chiawei_wang@...eedtech.com>
Cc:     joel@....id.au, andrew@...id.au, linux-aspeed@...ts.ozlabs.org,
        openbmc@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        ryan_chen@...eedtech.com
Subject: Re: [PATCH v2 1/5] dt-bindings: aspeed: Add eSPI controller

On Thu, Aug 19, 2021 at 04:00:36PM +0800, Chia-Wei Wang wrote:
> Add dt-bindings for Aspeed eSPI controller
> 
> Signed-off-by: Chia-Wei Wang <chiawei_wang@...eedtech.com>
> ---
>  .../devicetree/bindings/soc/aspeed/espi.yaml  | 158 ++++++++++++++++++
>  1 file changed, 158 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/aspeed/espi.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/aspeed/espi.yaml b/Documentation/devicetree/bindings/soc/aspeed/espi.yaml
> new file mode 100644
> index 000000000000..fec3d37f3ffd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/aspeed/espi.yaml
> @@ -0,0 +1,158 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# # Copyright (c) 2021 Aspeed Technology Inc.
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/soc/aspeed/espi.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Aspeed eSPI Controller
> +
> +maintainers:
> +  - Chia-Wei Wang <chiawei_wang@...eedtech.com>
> +  - Ryan Chen <ryan_chen@...eedtech.com>
> +
> +description:
> +  Aspeed eSPI controller implements a slave side eSPI endpoint device
> +  supporting the four eSPI channels, namely peripheral, virtual wire,
> +  out-of-band, and flash.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - aspeed,ast2500-espi
> +          - aspeed,ast2600-espi
> +      - const: simple-mfd
> +      - const: syscon

Is this really 2 sub devices that could be used individually or in a 
different combination? If not, then I'd make all this 1 node.

Rob