linux-kernel - Re: [PATCH] dt-bindings: mtd: spi-nand: Convert to DT schema format

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Date:   Mon, 19 Jul 2021 09:24:13 -0600
From:   Rob Herring <robh@...nel.org>
To:     Apurva Nandan <a-nandan@...com>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Pratyush Yadav <p.yadav@...com>,
        Michael Walle <michael@...le.cc>
Subject: Re: [PATCH] dt-bindings: mtd: spi-nand: Convert to DT schema format

On Sun, Jul 18, 2021 at 12:41:25AM +0000, Apurva Nandan wrote:
> Convert spi-nand.txt binding to YAML format with an added example.
> 
> Signed-off-by: Apurva Nandan <a-nandan@...com>
> ---
>  .../devicetree/bindings/mtd/spi-nand.txt      |  5 --
>  .../devicetree/bindings/mtd/spi-nand.yaml     | 74 +++++++++++++++++++
>  2 files changed, 74 insertions(+), 5 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.txt
>  create mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.txt b/Documentation/devicetree/bindings/mtd/spi-nand.txt
> deleted file mode 100644
> index 8b51f3b6d55c..000000000000
> --- a/Documentation/devicetree/bindings/mtd/spi-nand.txt
> +++ /dev/null
> @@ -1,5 +0,0 @@
> -SPI NAND flash
> -
> -Required properties:
> -- compatible: should be "spi-nand"
> -- reg: should encode the chip-select line used to access the NAND chip
> diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.yaml b/Documentation/devicetree/bindings/mtd/spi-nand.yaml
> new file mode 100644
> index 000000000000..366b86e1b19c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/spi-nand.yaml
> @@ -0,0 +1,74 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/spi-nand.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SPI NAND flash
> +
> +maintainers:
> +  - Apurva Nandan <a-nandan@...com>
> +
> +allOf:
> +  - $ref: "mtd.yaml#"
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: spi-nand

Drop 'oneOf' as there is only one.

> +
> +  reg:
> +    items:
> +      description:
> +        should encode the chip-select line used to access the NAND chip

Just:

reg:
  maxItems: 1

> +
> +  spi-max-frequency: true
> +  spi-rx-bus-width: true
> +  spi-tx-bus-width: true
> +
> +  partitions:
> +    type: object
> +
> +  '#address-cells': true
> +  '#size-cells': true
> +
> +patternProperties:
> +  # Note: use 'partitions' node for new users
> +  '^partition@':
> +    type: object
> +
> +  "^otp(-[0-9]+)?$":
> +    type: object
> +
> +additionalProperties: false

Just do:

additionalProperties:
  type: object

and then drop partitions, partition@, and ^otp(-[0-9]+)?$.

> +
> +examples:
> +  - |
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        flash@6 {
> +            #address-cells = <1>;
> +            #size-cells = <1>;
> +            compatible = "spi-nand";
> +            reg = <0x6>;
> +            spi-max-frequency = <42000000>;
> +
> +            partitions {
> +                compatible = "fixed-partitions";
> +                #address-cells = <1>;
> +                #size-cells = <1>;
> +
> +                partition@0 {
> +                    label = "boot";
> +                    reg = <0 0x200000>;
> +                };
> +
> +                partition@...000 {
> +                    label = "rootfs";
> +                    reg = <0x200000 0xce0000>;
> +                };
> +            };
> +        };
> +    };
> -- 
> 2.17.1
> 
>