linux-kernel - Re: [PATCH v6 1/3] dt-bindings: mtd: Add Loongson-1 NAND Controller

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Date: Wed, 27 Mar 2024 16:23:28 +0000
From: Conor Dooley <conor@...nel.org>
To: keguang.zhang@...il.com
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v6 1/3] dt-bindings: mtd: Add Loongson-1 NAND Controller

On Wed, Mar 27, 2024 at 06:43:59PM +0800, Keguang Zhang via B4 Relay wrote:
> From: Keguang Zhang <keguang.zhang@...il.com>
> 
> Add devicetree binding document for Loongson-1 NAND Controller.
> 
> Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
> ---
> Changes in v6:
> - A newly added patch
> ---
>  .../devicetree/bindings/mtd/loongson,ls1x-nfc.yaml | 66 ++++++++++++++++++++++
>  1 file changed, 66 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml b/Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml
> new file mode 100644
> index 000000000000..2494c7b3b506
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/loongson,ls1x-nfc.yaml
> @@ -0,0 +1,66 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/loongson,ls1x-nfc.yaml#

Please make the filename match the compatible.

> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Loongson-1 NAND Controller
> +
> +maintainers:
> +  - Keguang Zhang <keguang.zhang@...il.com>
> +
> +allOf:
> +  - $ref: nand-controller.yaml
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: loongson,ls1b-nfc
> +      - items:
> +          - enum:
> +              - loongson,ls1a-nfc
> +              - loongson,ls1c-nfc
> +          - const: loongson,ls1b-nfc
> +
> +  reg:
> +    maxItems: 1
> +
> +  dmas:
> +    maxItems: 1
> +
> +  dma-names:
> +    const: rxtx

If you only have one dma, why do you need a dma-names entry for it?

Looks fine to me otherwise though,
COnor.

> +
> +patternProperties:
> +  "^nand@[0-3]$":
> +    type: object
> +    $ref: raw-nand-chip.yaml
> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - dmas
> +  - dma-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    nand-controller@...78000 {
> +        compatible = "loongson,ls1b-nfc";
> +        reg = <0x1fe78000 0x40>;
> +
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        dmas = <&dma 0>;
> +        dma-names = "rxtx";
> +
> +        nand@0 {
> +            reg = <0>;
> +            nand-use-soft-ecc-engine;
> +            nand-ecc-algo = "hamming";
> +        };
> +    };
> 
> -- 
> 2.40.1
> 
> 

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