linux-kernel - Re: [PATCH v22 17/18] dt-bindings: mtd: pl353-nand: Describe this hardware controller

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Date:   Wed, 9 Jun 2021 14:01:10 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
        linux-mtd@...ts.infradead.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org
Cc:     Michal Simek <monstr@...str.eu>,
        Naga Sureshkumar Relli <nagasure@...inx.com>,
        Amit Kumar Mahapatra <akumarma@...inx.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        helmut.grohne@...enta.de, Srinivas Goud <sgoud@...inx.com>,
        Siva Durga Prasad Paladugu <sivadur@...inx.com>
Subject: Re: [PATCH v22 17/18] dt-bindings: mtd: pl353-nand: Describe this
 hardware controller

On 09/06/2021 10:01, Miquel Raynal wrote:
> Add a yaml description of this NAND controller which is described as a
> subnode of the SMC bus.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> ---
>  .../bindings/mtd/arm,pl353-nand-r2p1.yaml     | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml b/Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml
> new file mode 100644
> index 000000000000..e72fa14b4385
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/arm,pl353-nand-r2p1.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/arm,pl353-nand-r2p1.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PL353 NAND Controller device tree bindings
> +
> +allOf:
> +  - $ref: "nand-controller.yaml"
> +
> +maintainers:
> +  - Miquel Raynal <miquel.raynal@...tlin.com>
> +  - Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:

That's not an enum, but simple const without items.

> +          - arm,pl353-nand-r2p1
> +
> +  reg:
> +    items:
> +      - items:
> +          - description: CS with regard to the parent ranges property
> +          - description: Offset of the memory region requested by the device
> +          - description: Length of the memory region requested by the device

Doesn't it depend on parent's address/size cells?

> +
> +  "#address-cells": true
> +  "#size-cells": true

These should come from nand-controller.yaml

Best regards,
Krzysztof